poe synchronous flyback, ieee802.3at compliant, 3.3 v - 6 a · pdf fileobtain a flyback ccm...
Post on 16-Mar-2018
229 Views
Preview:
TRANSCRIPT
May 2015 DocID027783 Rev 1 1/31
31
AN4687Application note
PoE synchronous flyback, IEEE802.3at compliant, 3.3 V - 6 A PDconverter based on the PM8803 controller
Roberto Baragetti
Introduction
This document describes a reference design for a PoE+, high efficiency, 3.3 V - 6 A flyback converter based on the PM8803 PoE controller.
The PM8803 is highly integrated device embedding an IEEE802.3at compliant “Powered Device” (PD) interface together with a PWM controller and support for auxiliary sources.
The STEVAL-TSP009V2 reference design is based on an isolated flyback topology CCM converter with synchronous rectification and gate driver transformer. The same PCB can be populated in different ways to support various configurations and topologies (flyback with diode rectification, synchronous flyback with or without active clamp, self-driven synchronous flyback).
Figure 1. STEVAL-TSP009V2 evaluation board photo
www.st.com
Contents AN4687
2/31 DocID027783 Rev 1
Contents
1 Main characteristics and circuit description . . . . . . . . . . . . . . . . . . . . . 4
2 Schematic and BOM for 3.3 V at 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Measurements results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Efficiency comparison with three rectification bridge options . . . . . . . . . . 14
3.2 Converter efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 Voltage ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4 Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.5 Primary side waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.6 Secondary side waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.7 Load transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.8 PoE to auxiliary switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.9 Gloop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4 Support material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 PCB layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5 Electrical diagram general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
DocID027783 Rev 1 3/31
AN4687 List of figures
31
List of figures
Figure 1. STEVAL-TSP009V2 evaluation board photo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. STEVAL-TSP009V2 circuit schematic (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Figure 3. STEVAL-TSP009V2 circuit schematic (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Figure 4. Schematic Schottky bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 5. Schematic full active bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 6. Schematic half active bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Figure 7. Comparison efficiency bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Figure 8. Overall and DC/DC efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 9. Output voltage drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 10. Ripple on 3.3 V at 0.6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 11. Ripple on 3.3 V at 6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 12. Ripple before and after input filter with 3.3 V at 0.6 A
(measured on C26 and C28) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 13. Ripple before and after input filter with 3.3 V at 6 A
(measured on C26 and C28) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 14. Startup from Microsemi 9001G injector - 3.3 V at 0.6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 15. Startup from Microsemi 9001G injector - 3.3 V at 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 16. Startup from Microsemi 9501G injector - 3.3 V at 0.6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 17. Startup from Microsemi 9501G injector - 3.3 V at 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 18. Detail of the output voltage at startup with no load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 19. Detail of the output voltage at startup with 6 A load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 20. Primary steady state 0.6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 21. Primary steady state 6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 22. Detail of primary drain at 6 A load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 23. Secondary steady state 0.6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 24. Secondary steady state 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 25. Detail of secondary drain at 6 A load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Figure 26. Secondary steady state 0.6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 27. Secondary steady state 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 28. Detail of secondary drain at 6 A load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Figure 29. Gloop 48 V at 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 30. Gloop 48 V at no load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 31. Gloop 40 V at 6 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 32. Gloop 57 V at no load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 33. PCB top assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 34. PCB bottom assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 35. PCB layer 1 top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 36. PCB layer 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 37. PCB layer 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 38. PCB layer 4 bottom. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Figure 39. Schematic 1 of 2 (general) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 40. Schematic 2 of 2 (general) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Main characteristics and circuit description AN4687
4/31 DocID027783 Rev 1
1 Main characteristics and circuit description
The main characteristics (reference and electrical specifications) of the converter are listed in Table 1 and Table 2.
This document details the characteristics and performances of the PM8803 evaluation kit STEVAL-TSP009V2, which has been designed to cover a broad range of Power over Ethernet (PoE) applications.
The PM8803 is a highly integrated device embedding an IEEE802.3af/at compliant powered device (PD) interface together with a PWM controller and support for auxiliary sources.
Table 1. Reference
Reference code
Device PM8803
Evaluation board STEVAL-TSP009V2
Table 2. Electrical specification
Parameter Specifications
Input voltage supplies VIN [VDC] From 40 to 60 V
Auxiliary input voltage range From 30 to 60 V
Output voltage VOUT [VDC] 3.3 VDC ±5% at 6 A
Peak to peak output ripple < 25 mVPP
Efficiency DC-DC at full-load > 90%
Efficiency overall at full load > 87%
Transient response ∆VOUTPK to 50% load step < 250 mV
∆VOUT in load line case < 0.5%
GLOOP bandwidth > 4 kHz
GLOOP phase margin at 0 dB > 60 deg.
GLOOP dB margin at 0 deg. > 10 dB
DocID027783 Rev 1 5/31
AN4687 Main characteristics and circuit description
31
Even though PM8803 device can be configured to work in several isolated topologies, self-driven or a transformer gate driven; this application note focuses on a high efficiency isolated flyback converter topology with synchronous rectification, 3.3 V output voltage with 6 A output current capability.
Auxiliary sources can be connected to the board on two different input connectors. One input (AUX II) allows prevalence of the auxiliary sources with respect to the PoE, while the other input ( AUX I ) allows the usage of a wall adaptor with voltage lower than the internal PoE UVLO threshold and still benefits from the inherent inrush and DC current limit.
The possible configurations supported by the PM8803 demonstration kit as options on the same PCB are:
Alternative input bridge rectification: 4 possible options including standard diode bridges, discrete schottky diode bridges, half active bridges and full active bridges; schottky diode bridges are mounted on this eval board.
Optional 4 pairs detection circuit, to detect if power is provided on 2 pairs or on 4 pairs by a high power PSE source; this circuit is not used on this eval board.
Optional booster circuit, to increase the max. input current over 1A; this circuit is not used on this eval board.
Diode or synchronous rectification; 4 package options for the diode and 2 package options for the MOSFET;
Primary side snubber; 3 options included an active clamp; a simple R-C snubber is used on this eval board.
Power transformer; 3 size options for transformer gate driven solutions and 2 size options for self-driven applications.
The bill of material (BOM) in Table 3, provides the list of components to be mounted to obtain a flyback CCM converter with gate transformer driven synchronous rectifier, with 3.3 V output at a 6 A evaluation board.
Schematic and BOM for 3.3 V at 6 A AN4687
6/31 DocID027783 Rev 1
2 Schematic and BOM for 3.3 V at 6 A
2.1 Schematic
Figure 2. STEVAL-TSP009V2 circuit schematic (1 of 2)
R37
0R0
1206
R1
75R
0603
C12
2.2n
F18
122K
V
C9
2.2n
F18
122K
V
R32
15K
0805
C14
1nF
10%
0603
100V
D1
STT
H30
2SS
MC
C16
1nF
10%
0805
100V
R2
75R
0603
C18
0.1u
F 10
%08
0510
0V
TP22
Red
R5
75R
0603
C5
10nF
10%
0603
100V
C7
10nF
10%
0603
100V
R26
0R0
1206
D12
STP
S2H
100A
SMA
D7
STP
S2H
100A
SM
A
R12
50R
0
1206
D14
STPS
2H10
0AS
MA
J2 SP
1 2 3
TP24
BLA
CK
R17
0R01
206
R11 75R
0603
R12 75R
0603
TP3
BLA
CK
J4
DAT
A O
UTP
UT
1 2 3 4 5 6 7 8
910
D4
STP
S2H
100A
SM
A
R7
75R
0603
R13
75R
0603
J3
DAT
A &
PO
WE
R IN
PUT
1 2 3 4 5 6 7 8
910
C8
10nF
10%
0603
100V
D8
STP
S2H
100A
SM
A
R10
75R
0603
C21
1nF
10%
0603
100V
T1
ETH
1-46
0
2322 242120196 5 47 3 128910
1817161514131112
R43
0R0
1206
D11
SM
AJ5
8AS
MA
D17
STP
S2H
100A
SM
A
TP2
Red
TP23
BLA
CK
D9
STPS
2H10
0AS
MA
D13
STP
S2H
100A
SM
A
C6
10nF
10%
0603
100V
PO
E+F SS VSS VSSVSSVSSVS SVSS VSSVS SVSSVSSVSSVSSVSS VSSVSSVSSVS SVSSVSSVS SV
Cha
ssis
Cha
ssis
Cha
ssis
Cha
ssis
Cha
ssis
Cha
ssis
RTN
PO
E+F
VS
S
SP
AU
X 1
IXUAro latnorf tupn i yrailixuA
GSPG17042015DI1215
DocID027783 Rev 1 7/31
AN4687 Schematic and BOM for 3.3 V at 6 A
31
Figure 3. STEVAL-TSP009V2 circuit schematic (2 of 2)
Pow
ercir
cuit
Ou
tpu
tFi
lter Fe
edba
ckci
rcui
t
48V
AU
X2
Inpu
tFilt
er
NO
TEfo
rR
esis
tors
Whe
reno
tind
icat
edth
ebo
dyis
0603
and
tole
ran
ce5%
NO
TEfo
rC
apac
itors
Whe
reno
tind
icat
ed th
ebo
dyis
0603
and
the
volta
geis
50V
NO
TETh
eA
RTN
isa
dedi
cate
dpl
ane
ofsi
gnal
grou
ndth
atw
illbe
conn
ecte
dto
the
RTN
pow
ergr
ound
plan
ecl
ose
topi
n4
and
9of
PM
8803
NO
TEfo
r Ju
mpe
rsJM
1an
dJM
2M
ove
the
shor
ton
both
jum
pers
atth
esa
me
time:
-sh
ort
betw
een
pin
1an
d2
whe
nus
edA
UX
2in
put
-sh
ort
betw
een
pin
2an
d3
whe
nus
edA
UX
1in
put.
Aux
iliary
pres
ent
T2P
pres
ent
VSS
POE+
F
SP
SA
T2P
SP
VC T2P
VC
SA
VSS
RTN
ARTN
ARTN
RTN
ARTN
RTN
RTN
RTN
RTN
ARTN
RTN
R23
100R
1206
D32
MM
3Z15
VT1
SOD
323
R90
750R
R94
21K-
1%1%
TP5
Red
C53
1uF
C44
0.1u
F
Q17
Si4
848D
YSO
84
5 123
678
TP4
Red
R93
510R
R51
15K
0805
D57
BAT4
6JSO
D32
3
JM1
Jum
per-
dopp
io
1
2
3
C60 1nF
0805
100VR58
27K
C36
0.1u
D34 BA
T46J
SOD
323
C27
22uF
1206
16V
C30
150p
F08
0510
0V
R44
1K
C35
22uF
1206
16V
D39
BA
T46J
SOD
323
Q18
MM
BT39
04LT
1SO
T23
TP6
Red
C59
1uF
25V
0603
C67 22uF
1206
16V
TP9
Red
D28
BAT4
6JSO
D32
3
C28
2.2u
1210
100V
R91 10R
J5
11
22
C50
100n
F
R10
710
K
R66
10R
TP8
BLAC
K
R84 0R
0
C33
22uF
1206
16V
D36
BAT4
6JSO
D32
3
TP10
Red
TP14
Red
R12
2 0R0
C55
100p
F
R72
120K
-1%
1%
R13
1
30R
9 1
%R
0805
C61
2.2n 18
12
2KV
U1
PM
8803
HTS
SOP2
0-LA
RG
E
VDD
12D
ET13
SP14
CLS
15G
AT1
5R
TN4
CS
3
ARTN
8
DC
CL
16SA
17D
T18
T2P
20
RTN
9
GAT
27
VC6
ExPad21
VSS
10
VB2
CTL
1
FRS
19
VDD
11
TP11
BLAC
K
C41
1uF
25V
0603
U3
Fairc
hild
FO
D81
7AS
41 2
3
D20
Aux
det
C29
2.2u
1210
100V
R10
124
.9K-
1%1%
TP15
Red
R62
10R
C48
1uF
25V
0603
R45
24.9
K
C19
10nF
TP19
BLAC
K
R96
0R0
C34
330u
F
8x10
.216
V
T8
CO
ILC
RAF
T D
A231
9-AL
4 631
TP18
Red
R89 4.
3K
C69
10nF
C56
47nF
U4
TS43
1AIL
TSO
T23-
5
3 5
4 12
U7
Fairc
hild
FO
D81
7AS
41 2
3
R10
90.
30 o
hm -
1%12
06
C39
1uF
25V
0603
R10
3
510R
TP12
BLAC
K
D21
STT
H30
2SSM
C
Q12
Pow
erFL
AT™
5x6
STL
66N
3LLH
5
4
5123
678
TP21
Red
R27
27K
R11
73.
3K
C38
10nF
C64
2.2u
1210
100V
J1 SA
1 2 3
D26
Out det
L510
uH
MSS
7341
-103
ML
12
C45
0.1u
F
R10
80.
30 o
hm -
1%12
06
U2
Fairc
hild
FO
D81
7AS
41 2
3
R11
112
.4K-
1%1%
R83
10K
D44
T2P
det
R10
44.
7K-1
%
1%
R80
27R
C37 22uF
1206
16V
TP20
Red
Q16
MM
BT39
06LT
1SO
T23
D52 BA
T46J
SOD
323
R65
1K
R49
0R0
1206
R53 1R
0
0805
R38
1k
C68 22uF
1206
16V
C26
33uF
- 20
%10
0V10
x10.
2
R70
10K-
1%1%
TP13
Red
C22
TBD
1812
2KV
R64
0R0
C54
470p
C49
3.3n
F
R21 220R
1206
R95
24.9
K-1
%1%
R11
91K
R99 47K
T5
CO
ILC
RAF
T JA
4173
- AL
4 516 9
2
7 10
R54 0R
012
06
C40
1uF
25V
0805
C23
470n
F 1
0% 50V
0603
R92
10R
R08
05
L60.
33uH
DO
1813
-331
ML
12
TP16
Red
R52
1K
TP7
Red
C31
1.5n
F
0805
R11
2N
M1%
JM2
Jum
per-
dopp
io
1
2
3
R9
1K 1
%R
0603
D40
BA
T46J
SOD
323
GSPG20042015DI1120
Schematic and BOM for 3.3 V at 6 A AN4687
8/31 DocID027783 Rev 1
2.2 Bill of material
Table 3. STEVAL-TSP009V2 evaluation board BOM
Item Ref. Description Value PCB footprint Supplier Voltage
1 C5 Ceramic Capacitor 10 nF - 10% C0603 TDK 100 V
2 C6 Ceramic Capacitor 10 nF - 10% C0603 TDK 100 V
3 C7 Ceramic Capacitor 10 nF - 10% C0603 TDK 100 V
4 C8 Ceramic Capacitor 10 nF - 10% C0603 TDK 100 V
5 C9 Ceramic Capacitor 2.2 nF C1812 AVX 2 kV
6 C12 Ceramic Capacitor 2.2 nF C1812 AVX 2 kV
7 C14 Ceramic Capacitor 1 nF - 10% C0603 TDK 100 V
8 C16 Ceramic Capacitor 1 nF - 10% C0805 TDK 100 V
9 C18 Ceramic Capacitor 0.1 µF - 10% C0805 TDK 100 V
10 C19 Ceramic Capacitor 10 nF C0603 Several 50 V
11 C21 Ceramic Capacitor 1 nF - 10% C0603 TDK 100 V
12 C22 Ceramic Capacitor TBD C1812 AVX 2 kV
13 C23 Ceramic Capacitor 470 nF - 10% C0603 Several 50 V
14 C26 Aluminium Capacitor 33 µF - 20% C-POL8-10Panasonic
EEEFK2A330P100 V
15 C27 Ceramic Capacitor 22 µF C1206Murata -
GRM31CR61C226ME15L
16 V
16 C28 Ceramic Capacitor 2.2 µF C1210Murata -
GRM32ER72A225KA35L
100 V
17 C29 Ceramic Capacitor 2.2 µF C1210Murata -
GRM32ER72A225KA35L
100 V
18 C30 Ceramic Capacitor 150 pF C0805 TDK 100 V
19 C31 Ceramic Capacitor 1.5 nF C0805 Several 50 V
20 C33 Ceramic Capacitor 22 µF C1206Murata -
GRM31CR61C226ME15L
16 V
21 C34 Aluminium Capacitor 330 µF C-POL8-10Panasonic
EEEFK1C331P16 V
22 C35 Ceramic Capacitor 22 µF C1206Murata -
GRM31CR61C226ME15L
16 V
23 C36 Ceramic Capacitor 0.1 µF C0603 Several 50 V
24 C37 Ceramic capacitor 22 µF C1206Murata -
GRM31CR61C226ME15L
16 V
DocID027783 Rev 1 9/31
AN4687 Schematic and BOM for 3.3 V at 6 A
31
25 C38 Ceramic capacitor 10 nF C0603 Several 50 V
26 C39 Ceramic capacitor 1 µF C0603 KEMET 25 V
27 C40 Ceramic capacitor 1 µF C1206 KEMET 25 V
28 C41 Ceramic capacitor 1 µF C0603 KEMET 25 V
29 C44 Ceramic capacitor 0.1 µF C0603 Several 50 V
30 C45 Ceramic capacitor 0.1 µF C0603 Several 50 V
31 C48 Ceramic capacitor 1 µF C0603 KEMET 25 V
32 C49 Ceramic capacitor 3.3 nF C0603 Several 50V
33 C50 Ceramic capacitor 100 nF C0603 Several 50 V
34 C53 Ceramic capacitor 1 µF C0603 KEMET 25 V
35 C54 Ceramic capacitor 470 p C0603 Several 50 V
36 C55 Ceramic capacitor 100 pF C0603 Several 50 V
37 C56 Ceramic capacitor 47 nF C0603 Several 50 V
38 C59 Ceramic capacitor 1 µF C0603 KEMET 25 V
39 C60 Ceramic capacitor 1 nF C0805 TDK 100 V
40 C61 Ceramic capacitor 2.2 nF C1812 AVX 2 kV
41 C64 Ceramic capacitor 2.2 µF C1210Murata -
GRM32ER72A225KA35L
100 V
42 C67 Ceramic capacitor 22 µF C1206Murata -
GRM31CR61C226ME15L
16 V
43 C68 Ceramic capacitor 22 µF C1206Murata -
GRM31CR61C226ME15L
16 V
44 C69 Ceramic capacitor 10 nF C0603 Several 50 V
45 D1 Diode STTH302S SMC STM
46 D4 Schottky diode STPS2H100A SMA STM
47 D7 Schottky diode STPS2H100A SMA STM
48 D8 Schottky diode STPS2H100A SMA STM
49 D9 Schottky diode STPS2H100A SMA STM
50 D11 TVS diode SMAJ58A SMA STM
51 D12 Schottky diode STPS2H100A SMA STM
52 D13 Schottky diode STPS2H100A SMA STM
53 D14 Schottky diode STPS2H100A SMA STM
54 D17 Schottky diode STPS2H100A SMA STM
55 D20 Diode LED Aux det KA-3528SGT Kingbright
Table 3. STEVAL-TSP009V2 evaluation board BOM (continued)
Item Ref. Description Value PCB footprint Supplier Voltage
Schematic and BOM for 3.3 V at 6 A AN4687
10/31 DocID027783 Rev 1
56 D21 Diode STTH302S SMC STM
57 D26 Diode LED Out det KA-3528SGT Kingbright
58 D28 Schottky Diode BAT46J SOD323 STM
59 D32 Zener diode MM3Z15VT1 SOD323 Onsemi
60 D34 Schottky diode BAT46J SOD323 STM
61 D36 Schottky diode BAT46J SOD323 STM
62 D39 Schottky diode BAT46J SOD323 STM
63 D40 Schottky diode BAT46J SOD323 STM
64 D44 Diode LED T2P det KA-3528SGT Kingbright
65 D52 Schottky diode BAT46J SOD323 STM
66 D57 Schottky diode BAT46J SOD323 STM
67 JM1 Connector Jumper-doppio 3PIN-P254 Several
68 JM2 Connector Jumper-doppio 3PIN-P254 Several
69 J1 Connector SAP-JACK-RAPC722
Several
70 J2 Connector SPP-JACK-RAPC722
Several
71 J3 ConnectorData & power
inputRJ45-8PIN Molex
72 J4 Connector Data output RJ45-8PIN Molex
73 J5 ConnectorMOR-10X10.5-
P5-2PINMOR-2POLI-508 Several
74 L5 Inductor 10 µHMSS7341-
103MLCoilcraft
75 L6 Inductor 0.33 µH DO1813H Coilcraft
76 Q12 MOSFET STL66N3LLH5PowerFLAT™
5x6STM
77 Q16 MOSFET MMBT3906LT1 SOT23 Several
78 Q17 MOSFET Si4848DY so8pwrpak-SO8 VISHAY
79 Q18 MOSFET MMBT3904LT1 SOT23 Several
80 R1 Resistor 75 R R0603 Several
81 R2 Resistor 75 R R0603 Several
82 R5 Resistor 75 R R0603 Several
83 R7 Resistor 75 R R0603 Several
84 R9 Resistor 1K - 1% R0603 Several
85 R10 Resistor 75 R R0603 Several
86 R11 Resistor 75 R R0603 Several
Table 3. STEVAL-TSP009V2 evaluation board BOM (continued)
Item Ref. Description Value PCB footprint Supplier Voltage
DocID027783 Rev 1 11/31
AN4687 Schematic and BOM for 3.3 V at 6 A
31
87 R12 Resistor 75 R R0603 Several
88 R13 Resistor 75 R R0603 Several
89 R17 Resistor 0R0 R0805 Several
90 R21 Resistor 220 R R1206 Several
91 R23 Resistor 100 R R1206 Several
92 R26 Resistor 0R0 R1206 Several
93 R27 Resistor 27 K R0603 Several
94 R32 Resistor 15 K R0805 Several
95 R37 Resistor 0R0 R1206 Several
96 R38 Resistor 1 k R0603 Several
97 R43 Resistor 0R0 R0805 Several
98 R44 Resistor 1 k R0603 Several
99 R45 Resistor 24.9 k R0603 Several
100 R49 Resistor 0R0 R1206 Several
101 R51 Resistor 15 K R0805 Several
102 R52 Resistor 1 K R0603 Several
103 R53 Resistor 1R0 R1206 Several
104 R54 Resistor 0R0 R1206 Several
105 R58 Resistor 27 K R0603 Several
106 R62 Resistor 10 R R0603 Several
107 R64 Resistor 0R0 R0603 Several
108 R65 Resistor 1 K R0603 Several
109 R66 Resistor 10 R R0603 Several
110 R70 Resistor 10 K-1% R0603 Several
111 R72 Resistor 120 K-1% R0603 Several
112 R80 Resistor 27 R R0805 Several
113 R83 Resistor 10 K R0603 Several
114 R84 Resistor 0R0 R0603 Several
115 R89 Resistor 4.3 K R0603 Several
116 R90 Resistor 750 R R0603 Several
117 R91 Resistor 10 R R0603 Several
118 R92 Resistor 10 R R0805 Several
119 R93 Resistor 510 R R0603 Several
120 R94 Resistor 21 K-1% R0603 Several
121 R95 Resistor 24.9 K-1% R0603 Several
Table 3. STEVAL-TSP009V2 evaluation board BOM (continued)
Item Ref. Description Value PCB footprint Supplier Voltage
Schematic and BOM for 3.3 V at 6 A AN4687
12/31 DocID027783 Rev 1
122 R96 Resistor 0R0 R0603 Several
123 R99 Resistor 47 K R0603 Several
124 R101 Resistor 24.9 K-1% R0603 Several
125 R103 Resistor 510 R R0603 Several
126 R104 Resistor 4.7 K-1% R0603 Several
127 R107 Resistor 10 K R0603 Several
128 R108 Resistor 0.30 Ω - 1% R1206 Bourns
129 R109 Resistor 0.30 Ω - 1% R1206 Bourns
130 R111 Resistor 12.4 K-1% R0603 Several
131 R112 Resistor NM R0603 Several
132 R117 Resistor 3.3 K R0603 Several
133 R119 Resistor 1K R0603 Several
134 R122 Resistor 0R0 R0603 Several
135 R125 Resistor 0R0 R1206 Several
136 R131 Resistor 30R9 -1% R0805 Several
137 TP2 Test point Red TH-5013 Keystone
138 TP3 Test point Black TH-5013 Keystone
139 TP4 Test point Red TH-5013 Keystone
140 TP5 Test point Red TH-5013 Keystone
141 TP6 Test point Red TH-5013 Keystone
142 TP7 Test point Red TH-5013 Keystone
143 TP8 Test point Black TH-5013 Keystone
144 TP9 Test point Red TH-5013 Keystone
145 TP10 Test point Red TH-5013 Keystone
146 TP11 Test point Black TH-5013 Keystone
147 TP12 Test point Black TH-5013 Keystone
148 TP13 Test point Red TH-5013 Keystone
149 TP14 Test point Red TH-5013 Keystone
150 TP15 Test point Red TH-5013 Keystone
151 TP16 Test point Red TH-5013 Keystone
152 TP18 Test point Red TH-5013 Keystone
153 TP19 Test point Black TH-5013 Keystone
154 TP20 Test point Red TH-5013 Keystone
155 TP21 Test point Red TH-5013 Keystone
156 TP22 Test point Red TH-5013 Keystone
157 TP23 Test point Black TH-5013 Keystone
Table 3. STEVAL-TSP009V2 evaluation board BOM (continued)
Item Ref. Description Value PCB footprint Supplier Voltage
DocID027783 Rev 1 13/31
AN4687 Schematic and BOM for 3.3 V at 6 A
31
158 TP24 Test point Black TH-5013 Keystone
159 T1 Data transfo ETH1-460 ETH1-460 Coilcraft
160 T5 Power transfoCOILCRAFT JA4173 - AL
PA2328NL Coilcraft
161 T8 Power transfoCOILCRAFT DA2319-AL
DA2318-AL Coilcraft
162 U1 Controller IC PM8803HTSSOP20-
LARGESTM
163 U2 OptocouplerFairchild
FOD817ASFOD817 Fairchild
164 U3 OptocouplerFairchild
FOD817ASFOD817 Fairchild
165 U4 Voltage reference TS431AILT SOT23-5L STM
166 U7 OptocouplerFairchild
FOD817ASFOD817 Fairchild
Table 3. STEVAL-TSP009V2 evaluation board BOM (continued)
Item Ref. Description Value PCB footprint Supplier Voltage
Measurements results AN4687
14/31 DocID027783 Rev 1
3 Measurements results
3.1 Efficiency comparison with three rectification bridge options
STEVAL-TSP009V2 provides different rectification bridge options: single Schottky diode, half active bridge, full active bridge and diode bridge. They are alternatively usable thanks the options available on the STEVAL-TSP009V2 demo’s PCB. Efficiency measurements have been executed to compare the different characteristics cost/efficiency through three different rectification bridge options. Here below the schematics:
Figure 4. Schematic Schottky bridge
R37
0R01206
R3215K0805
D13STPS2H100ASMA
R26
0R01206
D8STPS2H100ASMA
TP2Red
C15NM0805
TP3BLACK
D12STPS2H100ASMA
D14STPS2H100ASMA
D17STPS2H100ASMA
D9STPS2H100ASMA
D4STPS2H100ASMA
D1
STTH302SSMC
J2
SP
123
D7STPS2H100ASMA
T1 pin.4 T1 pin.10T1 pin.1 T1 pin.7SP
POE+F
VSS
AUX 1
GSPG22042015DI1500
DocID027783 Rev 1 15/31
AN4687 Measurements results
31
Figure 5. Schematic full active bridge
Figure 6. Schematic half active bridge
C77NM
R291M
0603
Q4P-Ch. 100V
SO8
4
51
6 7 8
2 3
R37
0R01206
R20200K
0603
C75NM
R19200K0603
D3
MM3Z15VT1SOD323
R34
1M0603
R281M
0603R311M
0603
R26
0R01206
R3215K0805
Q7N-Ch. 100V
SO8
4
51 2 3
6 7 8
R40200K
0603
R25200K0603
R39200K0603
C79NM
D6MM3Z15VT1SOD323
R301M
0603
R361M
0603
D2MM3Z15VT1SOD323
Q1P-Ch. 100V
SO8
4
51
6 7 8
2 3
C73NM
D15MM3Z15VT1SOD323
C15
NM0805
R42200K0603
C78NM
D18MM3Z15VT1SOD323
D19MM3Z15VT1SOD323
D5MM3Z15VT1SOD323
C72NM
Q5N-Ch. 100V
SO8
4
51 2 3
6 7 8
TP3BLACK
Q6N-Ch. 100V
SO8
4
51 2 3
6 7 8
D16MM3Z15VT1SOD323
R41200K0603
R351M0603
R331M
0603
C76NM
C74NM
TP2Red
D1
STTH302SSMC
Q2P-Ch. 100V
SO8
4
51
6 7 8
2 3
J2
SP
123
Q3P-Ch. 100V
SO8
4
51
6 7 8
2 3
R22200K0603
Q8N-Ch. 100V
SO8
4
51 2 3
6 7 8
SP
T1 pin.4 T1 pin.10
T1 pin.1 T1 pin.7
POE+F
VSS
AUX 1
GSPG22042015DI1505
R26
0R01206
R331M
0603
C76NM
D7STPS2H100ASMA
C15NM0805
R40200K0603
R42200K0603
C78NM
TP2Red
R39200K0603
Q6N-Ch. 100V
SO8
4
51 2 3
6 7 8 Q8N-Ch. 100V
SO84
51 2 3
6 7 8
R41200K0603
J2
SP
123
R341M
0603
R361M
0603
D1
STTH302SSMC
D16MM3Z15VT1SOD323
D18MM3Z15VT1SOD323
Q5N-Ch. 100V
SO8
4
51 2 3
6 7 8
C79NM
D8STPS2H100ASMA
D15MM3Z15VT1SOD323
R37
0R01206
C77NM
D4
STPS2H100ASMA
TP3BLACK
R3215K0805
R351M
0603
D19MM3Z15VT1SOD323
D9STPS2H100ASMA
Q7N-Ch. 100V
SO8
4
51 2 3
6 7 8
SP
T1 pin.4 T1 pin.10T1 pin.1 T1 pin.7
VSS
POE+F
AUX 1
GSPG22042015DI1510
Measurements results AN4687
16/31 DocID027783 Rev 1
The measurement has been executed providing a 48 V on the RJ45 connector and connecting the Poe+/Vss (TP22 vs TP23) with external electronic load with different current values to cover around 40 W of input power.
Figure 7. Comparison efficiency bridge
Figure 7 shows the input stage efficiency comparison with three different bridge rectification type. The green line shows the efficiency of the Schottky diode bridge option, the cheaper of them, populated with four Schottky diodes STPS2H100A of each bridge. The yellow line shows the efficiency of the full active bridge, the most efficient, using two 100 V - 240 mΩ, P-channel MOSFET on high side and two 100 V - 65 mΩ N-channel MOSFET on low side of each bridge. The red line shows the half active bridge solution, which represent a right compromise in term of cost vs. efficiency.
Changing the input bridge it is possible to gain up to 2% about on the overall converter efficiency.
96.0%
96.5%
97.0%
97.5%
98.0%
98.5%
99.0%
99.5%
100.0%0
100
200
300
400
500
600
700
800
Efficiency [%]
Input Current [mA]
Efficiency Data Transfo + Bridge
Schottky Diode Bridge
Full Active Bridge
Half Active Bridge
DocID027783 Rev 1 17/31
AN4687 Measurements results
31
3.2 Converter efficiency
Figure 8. Overall and DC/DC efficiency
Figure 8 shows overall and DC/DC efficiencies for the converter at 48 Vindc.
The dotted green line is the STEVAL-TSP009V2 DC-DC efficiency. The measurement has been executed supplying 48 V to the input RJ45 connector J1 and measuring the input voltage by TP22/TP23, input voltage of DC/DC converter stage. Figure 8 shows also the overall efficiency comparison measured with the same DC-DC converter stage connected to the three different rectification bridge stages previously mentioned.
Please note that:
Overall efficiency includes all loss from RJ45 to the output voltage rail.
DC/DC efficiency is a figure of merit of the converter standalone and typically does not include the losses associated to the PoE interface section that are: the RJ45 connector, data transformer, bridges, power consumption of the I/F of the PM8803 device.
On the STEVAL-TSP009V2 eval board is mounted the simple Schottky diodes bridge solution (green line).
Thanks to the bridge rectification options foreseen on the pcb it is then possible to select the best compromise cost/efficiency depending on the target request.
75.0%
77.5%
80.0%
82.5%
85.0%
87.5%
90.0%
92.5%
95.0%
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Efficiency
Iout [mA]
3.3 Vout Overall and DC/DC Efficiency
Overall with Schottky
Overall FAB
Overall HAB
DC-DC
Measurements results AN4687
18/31 DocID027783 Rev 1
Figure 9. Output voltage drift
3.3 Voltage ripple
Above measurements are referred at the output voltage ripple.
3.330
3.332
3.334
3.336
3.338
3.340
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Output Voltage
Iout [mA]
3.3 Vout changhe with load
drift 3V3 at 48V
Figure 10. Ripple on 3.3 V at 0.6 A Figure 11. Ripple on 3.3 V at 6 A
DocID027783 Rev 1 19/31
AN4687 Measurements results
31
In Figure 12 and Figure 13 a measurement of the ripple on the input voltage has been done, to give an indication of the noise at the input of the converter.
3.4 Startup
Figure 12. Ripple before and after input filter with 3.3 V at 0.6 A (measured on C26 and C28)
Figure 13. Ripple before and after input filter with 3.3V at 6A (measured on C26 and C28)
Figure 14. Startup from Microsemi 9001G injector - 3.3 V at 0.6 A
Figure 15. Startup from Microsemi 9001G injector - 3.3 V at 6 A
Measurements results AN4687
20/31 DocID027783 Rev 1
Figure 16. Startup from Microsemi 9501G injector - 3.3 V at 0.6 A
Figure 17. Startup from Microsemi 9501G injector - 3.3 V at 6 A
Figure 18. Detail of the output voltage at startup with no load
Figure 19. Detail of the output voltage at startup with 6 A load
DocID027783 Rev 1 21/31
AN4687 Measurements results
31
3.5 Primary side waveforms
Figure 20. Primary steady state 0.6 A Figure 21. Primary steady state 6 A
Figure 22. Detail of primary drain at 6 A load
Measurements results AN4687
22/31 DocID027783 Rev 1
3.6 Secondary side waveforms
3.7 Load transients
Figure 23. Secondary steady state 0.6 A Figure 24. Secondary steady state 6 A
Figure 25. Detail of secondary drain at 6 A load
Figure 26. Secondary steady state 0.6 A Figure 27. Secondary steady state 6 A
DocID027783 Rev 1 23/31
AN4687 Measurements results
31
3.8 PoE to auxiliary switchover
In Figure 28 is shown a smooth transition from a PoE line set to 54 V toward an auxiliary adapter at 44 V; the output voltage is maintained stable during the transition.
3.9 Gloop
Figure 28. Detail of secondary drain at 6 A load
Figure 29. Gloop 48 V at 6 A Figure 30. Gloop 48 V at no load
Gloop 48V 6AMag [B/A] (dB)
30.000
-30.000
24.000
18.000
12.000
6.000
0.000
-6.000
-12.000
-18.000
-24.000
Phase [B-A] (deg)
100.000
-100.000
80.000
60.000
40.000
20.000
0.000
-20.000
-40.000
-60.000
-80.000
1 k 10 k 100 k
1 2
01/23/14 09:46:34
M1 M2Frequency 4.68 kHz 20.30 kHzMagnitude -0.001 dB -10.094 dBPhase 67.018 deg -0.024 deg
Gloop 48V 0AMag [B/A] (dB)
30.000
-30.000
24.000
18.000
12.000
6.000
0.000
-6.000
-12.000
-18.000
-24.000
Phase [B-A] (deg)
100.000
-100.000
80.000
60.000
40.000
20.000
0.000
-20.000
-40.000
-60.000
-80.000
1 k 10 k 100 k
1 2
01/23/14 09:51:50
M1 M2Frequency 5.71 kHz 26.12 kHzMagnitude -0.002 dB -11.404 dBPhase 69.669 deg -0.013 deg
Measurements results AN4687
24/31 DocID027783 Rev 1
Figure 31. Gloop 40 V at 6 A Figure 32. Gloop 57 V at no load
Gloop 40V 6AMag [B/A] (dB)
30.000
-30.000
24.000
18.000
12.000
6.000
0.000
-6.000
-12.000
-18.000
-24.000
Phase [B-A] (deg)
100.000
-100.000
80.000
60.000
40.000
20.000
0.000
-20.000
-40.000
-60.000
-80.000
1 k 10 k 100 k
1 2
01/23/14 09:49:07
M1 M2Frequency 4.00 kHz 19.54 kHzMagnitude -0.001 dB -10.901 dBPhase 64.426 deg -0.010 deg
Gloop 57V 0AMag [B/A] (dB)
30.000
-30.000
24.000
18.000
12.000
6.000
0.000
-6.000
-12.000
-18.000
-24.000
Phase [B-A] (deg)
100.000
-100.000
80.000
60.000
40.000
20.000
0.000
-20.000
-40.000
-60.000
-80.000
1 k 10 k 100 k
1 2
01/23/14 09:53:09
M1 M2Frequency 6.27 kHz 26.28 kHzMagnitude -0.002 dB -10.647 dBPhase 69.901 deg -0.018 deg
DocID027783 Rev 1 25/31
AN4687 Support material
31
4 Support material
4.1 PCB layers
Figure 33. PCB top assembly
Figure 34. PCB bottom assembly
Support material AN4687
26/31 DocID027783 Rev 1
Figure 35. PCB layer 1 top
Figure 36. PCB layer 2
Figure 37. PCB layer 3
DocID027783 Rev 1 27/31
AN4687 Support material
31
Figure 38. PCB layer 4 bottom
Electrical diagram general AN4687
28/31 DocID027783 Rev 1
5 Electrical diagram general
Figure 39. Schematic 1 of 2 (general)
Q3
SO
8
4
51678
23
D1
STT
H30
2SS
MC
D25
<Des
crip
tion>
41
32
-+
Q22
2N70
02
D6
SO
D32
3
R13 75R
0603
R7
75R
0603
C5
10nF
0603
100V
D33
BAT
46J
SO
D32
3
R41
0603
C73
D5
SO
D32
3
D13
SM
AS
TPS
2H10
0A
R2
75R
0603
R31
0603
Q6
SO
8 4
5 123
678
D14
SM
AS
TPS
2H10
0A
J4
DAT
A O
UTP
UT
1 2 3 4 5 6 7 8
910
R29
0603
Q2
SO
8
4
51678
23
C74
C13
NM
0603
100V
D8
SM
AS
TPS
2H10
0A
D47
BAT
46J
SO
D32
3
R36
0603
R30
0603
U12
Sha
rp P
C3H
7 - N
M41 2
3
C6
10nF
0603
100V
Q7
SO
8
4
5 123
678
J2 SP
1 2 3
D56
MM
3Z15
VT1
SO
D32
3
Q5
SO
8
4
5 123
678
C14
1nF
0603
100V
R6
1M 0603
D11
SM
AJ5
8AS
MA
R5
75R
0603
D18
SO
D32
3
D12
SM
AS
TPS
2H10
0A
R24
1M 0603
D48
BAT
46J
SO
D32
3
T11
Puls
e P
E65
855N
L - N
M
4
3 2
1
R19
0603
R28
0603
Q1
SO
84
51678
23
R32
15K
0805
D50
4P d
et
R43
0R12
06
C79
R34
0603
R35
0603
D9
SM
AS
TPS
2H10
0A
C77
C72
D3
SO
D32
3
D15
SO
D32
3
D4
SM
AS
TPS
2H10
0A
D19
SO
D32
3D49
BAT
46J
SO
D32
3
U6
Fairc
hild
FO
D81
7AS
41 2
3
C7
10nF
0603
100V
T2
Wur
th 7
4422
6S -
NM
2
34
1
R55
1M 0603
T1
ETH
1-46
0
2322 242120196 5 47 3 128910
181716151413
1112
R20
0603
R16
NM
0805
TP22
Red
R37
0R0
1206
R10 75R
0603
C20
NM
0603
100V
Q4
SO
84
51678
23
D10 NM
SM
AR12
50R
1206
C9
2.2n
F
1812
2KV
C17
NM
0805
100V
R46 47K
D17
SM
AS
TPS
2H10
0A
R8
1M 0603
R25
0603
R10
00N
M
0603
R11 75R
0603
C15
NM
0805
C76
R15
NM
0805
C12
2.2n
F
1812
2KV
TP3
BLA
CK
C8
10nF
0603
100V
D24
<Des
crip
tion>
4
1
3
2
-+
R47
3K3
R26
0R0
1206
C21
1nF
0603
100V
R14
NM
1206
R42
0603
D29
BAT
46J
SO
D32
3
R17
0R12
06
J3
DAT
A &
PO
WE
R IN
PU
T
1 2 3 4 5 6 7 8
910
R33
0603
C75
R12 75R
0603
R40
0603
TP24
BLA
CK
C78
C16
1nF
0805
100V
D7
SM
AS
TPS
2H10
0A
D30
BAT
46J
SO
D32
3
TP23
BLA
CK
Q8
SO
8 4
5 123
678
R1
75R
0603
TP2
Red
D16
SO
D32
3
C18
0.1u
F08
0510
0V
D2
SO
D32
3
R22
0603
TP25
Red
R39
0603
SS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS V
F+EOP
F+EOP
F+EOP
Cha
ssis
Cha
ssis
Cha
ssis
Cha
ssis
Cha
ssis
Cha
ssis
RTN
RTN
PO
E+F
VS
S
Vout
SP
PO
E+F
VS
S
Inpu
t Com
mon
Mod
e Fi
lter
Opt
iona
l 4
pairs
det
ectio
n ci
rcui
t
AUX
1
Auxi
liary
inpu
t fro
ntal
or A
UX
I
4 pa
irs d
etec
tion
sign
al
DocID027783 Rev 1 29/31
AN4687 Electrical diagram general
31
Figure 40. Schematic 2 of 2 (general)
Q19
MM
BT39
04LT
1SO
T23
TP9
Red
C42
NM
16V
0603
TP11
BLAC
K
R96
0R
Q25
TSSO
P6
3
561
4
2
D46
STPS
8L30
DEE
Pow
erFL
AT 3
x3
D22
STPS
15L4
5CB
DPA
K
A1 K
A2
R117
5.1K
R130
100K
R127
1M
C62
NM
0805
100V
R60
0R
R112
15K
1%
T5
Coilc
raft
HA
3691
-AL
4 516 9
2
7 10
C28
2.2u
1210
100V
D42
NM
SMA
T8CO
ILCR
AFT
DA
2319
-AL
4 631
L70.
33uH
DO
3316
P-10
3ML
12
R56
NM
D52 BA
T46J
SOD
323
C26
33uF
100V
10x1
0.2
R70
21K
1%
C49
10nF
D32
MM
3Z15
VT1
SOD
323
U11
Shar
p PC
3H7
41 2
3
U5
TS24
31A
ILT
SOT2
3
1 3
2
R84 0R
C61
2.2n
1812
2KV
U3
Fairc
hild
FO
D81
7AS
41 2
3
D20
Aux
det
R62
10R
U10
Shar
p PC
3H7
41 2
3
TP5
Red
D28
BAT4
6J
SOD
323
R107
10k
R122 0R
D45
STPS
15L3
0CD
JFPo
wer
FLAT
5x6
A1 K
A2
Q9
MM
BT39
06LT
1 N
MSO
T23
C39
1uF
16V
0603
R108
0.30
ohm
1206
TP13
Red
R92
22R
R080
5
R48
0R
R080
5
R93
1K
R51
15K
0805
R58
27K
R44
1K
R91
10
R67
NM 1%
R89
3.3K
C69
10nF
C45
0.1u
F
T4
PA01
84-P
ulse
1 854
TP20
Red
D23
NM
SMA
C43
NM
4x6
25V
R23
220
1206
C60
1nF 08
05100V
Q18
MM
BT39
04LT
1SO
T23
C71
470p
F50
V
Q11
TBD
SOT2
31
3 2
T9
COIL
CRA
FT G
A32
78-B
L
4 125
711 81210 93 6
TP15
Red
C32
NM
0805
TP12
BLAC
K
R100 NM
C68
10uF
1206
16V
R21 22
012
06
TP4
Red
T7
COIL
CRA
FT P
OE1
3P
4 123
987 10
D39
BAT4
6J
SOD
323
TP8
BLAC
K
C38
10nF
R80
10R
R73
NM
132
R53
10R
0805
C47
NM
R52
1K
D55
MM
3Z15
VT1
SOD
323
Q17
Si48
48D
YSO
84
5 123
678
J5
11
22
C41
1uF
16V
0603
R129
100K
R109
0.30
ohm
1206
D21
STTH
302S
SMC
C24
NM
0805
L510
uH
MSS
7341
-103
ML
12
D44
T2P
det
C37
10uF
1206
16V
R49
0R 1206
R38
1k
R997 N
M 1% R998 N
M 1%
C59
1uF
16V
0603
C63
2.2u
1210
100V
TP10
Red
T6
COIL
CRA
FT P
OE3
00F-
50L
4 12 5
711 812 10 9
3 6
R45
33K
R27
27k
Q16
MM
BT39
06LT
1SO
T23
C22
TBD
1812
2KV
R99
47K
R54
0R 1206
C40
NM
16V
0805
D38 BA
T46J
SOD
323
JM2
Jum
per-
dopp
io
1
2
3
R9 1K 1
%r0
603
D40
BAT4
6JSO
D32
3
R59
0R 1206
R102
NM
0805
1%
C55
100p
F
R131
30R9
1%
r080
5
R101
24.9
K1%
C19
NM
R57
NM
L60.
33uH
DO
1813
-331
ML
12
TP16
Red
C51
47nF
1206
200V
C44
0.1u
F
Q10 TB
DD
Pack
13
3
2
2
JM1
Jum
per-
dopp
io
1
2
3
Q14
MM
BT39
04LT
1SO
T23
C25
NM
R98
0R
U7
Fairc
hild
FO
D81
7AS 4
1 23
TP21
Red
C64
2.2u
1210
100V
C54
470p
R119
1K
R90
680R
D41
BAT4
6J
SOD
323
TP14
Red
U1
PM88
03H
TSSO
P20-
LARG
E
VDD
12
DET
13
SP14
CLS
15
GAT
15
RTN
4
CS3
ART
N8
DCC
L16
SA17
DT
18
T2P
20
RTN
9
GAT
27
VC6
Ex Pad21
VSS
10
VB2
CTL
1
FRS
19
VDD
11
C48
1uF
16V
0603
TP19
BLAC
K
D31
BAT4
6J
NM
SOD
323
U9
Shar
p PC
3H7
41 2
3
R111
12.4
k1%
R83
10K
C31
1nF
0805
D57
BAT4
6JSO
D32
3
C67
10uF
1206
16V
D51 BA
T46J
SOD
323
Q21
IRF6
216P
bFSO
8
4
5 123
678
R999
NM
1%
U4
TS43
1AIL
TSO
T23-
5
3 5
4 12
D26
Out det
R97 NM
TP7
Red
R94
21k
1%
C53
1uF
C30
100p
F08
0510
0V
D36
BAT4
6JSO
D32
3
D54
BAT4
6JSO
D32
3
C29
2.2u
1210
100V
R106
10K
T10
COIL
CRA
FT F
A27
06-B
L
NM
4 125
711 81210 93 6
Q12
STL6
6N3L
LH5
Pow
er F
lat 5
x6
4
5123
678
J1 SA
1 2 3
R65
1K
R95
24.9
K1%
C57
0.1u
F
R128
NM
D34 BA
T46J
SOD
323
C27
10uF
1206
16V
C35
10uF
1206
16V
R71
NM
TP6
Red
C50
0.1u
F
R66
10R
R18
NM
1206
C70
1 nF 50
V06
03
C34
330u
F
8x10
.26.
3V
C66
NM
C56
47nF
C46
NM
Q15
MM
BT39
04LT
1 N
MSO
T23
C36
0.1u
D35
BAT4
6J N
MSO
D32
3
D43
STPS
2L30
UF
SMB
Q20
Si23
25D
SSO
T23
1
3 2
Q13 TB
DSO
T223
13
3
2
2
R72
100k
1%
Q24 STS4
NF1
00SO
8
4
51
6 7 8
2 3
U2
Fairc
hild
FO
D81
7AS 4
1 23
R104
4.7K
1%
TP17
Red
R64 0R
C23
470n
F 1
0% 50V
0603
C33
10uF
1206
16V
Q23
MM
BTA
92SO
T23
TP18 Re
d
R103
510R
D53
BAT4
6JSO
D32
3
R126
100K
D37
BAT4
6JSO
D32
3
RTN
ART
N
ART
N
RTN
ART
N
RTN
RTN
RTN
RTN
ART
N
RTN
VSS
POE+
F SP
SA
T2P
SP
VAU
X
VAU
X
SA
VC T2P
P_dr
ain
P_so
urce
P_ga
te
P_dr
ain
P_so
urce
P_ga
te
VC
Ano
deKa
thod
e
Kath
ode
Ano
de
Vaux
P
RTN
Vin
Vin
P_dr
ain
Vaux
P
RTN
Kath
ode
Vo
Vgat
e
Vgat
e
SA
VSS
Vo
VSS
POE+
F
Vout
Pow
er c
ircui
t
Out
put F
ilter Fe
edba
ck c
ircui
t
48V
AU
X 2
Inpu
t Filt
er
Boos
ter
NO
TE fo
r Res
isto
rs W
here
not
indi
cate
d th
e bo
dy is
060
3 an
d to
lera
nce
5% N
OTE
for C
apac
itors
Whe
re n
ot in
dica
ted
the
body
is 0
603
and
the
volta
ge is
50V
NO
TE
The
ART
N is
a d
edic
ated
pla
ne o
f sig
nal g
roun
d th
at w
ill b
e co
nnec
ted
to th
e RT
N p
ower
gro
und
plan
e cl
ose
to p
in 4
and
9 o
f PM
8803
Opt
ion
Activ
e Cl
amp
Prev
eder
e fo
otpr
int 1
206,
0805
pe
r C40
I fo
otpr
int d
evon
o es
sser
e il
piu'
pos
sibi
le s
ovra
ppos
ti,
al fi
ne d
i min
imiz
zare
lo
spaz
io u
sato
.
Opt
o :u
n fo
otpr
int n
ell'a
ltro
SOT2
3-6L
Alte
rnat
ive
mos
fet
pack
ages
Alte
rnat
ive
diod
e pa
ckag
es
NO
TE fo
r Jum
pers
JM1
and
JM2
Mov
e th
e sh
ort o
n bo
th ju
mpe
rs a
t the
sam
e tim
e: - s
hort
bet
wee
n pi
n 1
and
3 w
hen
used
AU
X2 in
put
- sho
rt b
etw
een
pin
2 an
d 3
whe
n us
ed A
UX1
inpu
t.
For P
M88
03C
only
Prev
eder
e fo
otpr
int 1
206
e 12
10 p
er C
51
NM
NM
Auxi
liary
pre
sent
T2P
pres
ent
Opt
ion
Boos
ter
Opt
ion
Sel
f Driv
en 2
alte
rnat
ive
pow
er tr
ansf
orm
er
NM
NM
Revision history AN4687
30/31 DocID027783 Rev 1
6 Revision history
Table 4. Document revision history
Date Revision Changes
25-May-2015 1 Initial release.
DocID027783 Rev 1 31/31
AN4687
31
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2015 STMicroelectronics – All rights reserved
top related