al8820 for non- dimmable mr16 led driver solution
TRANSCRIPT
AL8820 for non-dimmable MR16 LED Driver
The Diodes Advantage
Input voltage: Typ AC12V;
Output Current accuracy: ±3% ;
High Power Factor: >0.9 ;
High operation frequency : up to 1Mhz;
Integrated NMOS
Protection: OTP, UVLO, Soft Start
Boost stage Protection: OVP ； Buck stage Protection: Short /open load protection
High electronic transformer compatibility
Device
Min Input
Voltage
Max Input
VoltageVOUT
Mos DriveVolta
ge
SwitchCurrent
Integrated MOS RDS(ON)
Feedback
Voltage
Switching
Frequency
Package
V V V V A mΩ V kHz
AL8820 5 35 ADJ VCC 3 200 1.22 <1MHZ SO8-EP
What’s HOT
Test Item List
Test item Test condition Spec Test Value
Input Voltage With ET 208-253VacOutput voltage With ET 10v 10VOutput current With ET 650ma 650mAOutput Power With ET 6.5W 6.5w
Efficiency without ET （ 12vac ） 78%With ET ~71%
PF With ET >0.9Line regulation With ET < 0.94%Load regulation With ET < 2.0%
output current ripple With ET <10%
output open protection functionwith ET Ok
without ET （ 12vac ） Okoutput open power loss Without ET （ 12vac ） 0-0.1W
output short protectionwith ET Ok
without ET （ 12vac ） okoutput open power loss without et （ 12vac ） 0.7W
Case temperature Ta=30°C 77.7CThermal Shutdown TOTSD 165
Thermal Shutdown Hysteresis THYS 20
EMI 12Vac/60hzEN55022
(30M-1GHZ)
PASS
Schematic
L1
L2
L3
D1 D2
D3 D4
D5
D6
CS12
FB3
CMP4
VCC7 G
ND
9
CS25
SW28
VIN6
SW11
u1AL8820
C1C2 C3
C4
C5
C6 C7
C8
R1
R2
R3 R4
Rcs
C9 C10
F1
Fuse 1
R6
R7
Lm3
Lm4
GNDGND
GND
GND
GND
GND
FB
FB
led+
led-
SGND
Rcs1
Notes: C9,C10,Lm3,R4,C4 ,C7 no connected.
BOM – Total 26 Components including AL8820, BOM < $0.7
components price quantity cost(RMB)D1,D2,D3,D4
D5,D6B240 0.12 6
$ 0.120 R1 50K,0603 0.01 1 $ 0.002 R2 3K,0603 0.01 1 $ 0.002
R6,R7 0.3ohm,1206 0.01 2 $ 0.003 RCS1 0.3ohm ,1206 0.01 1 $ 0.002 RCS 0.4ohm,1206 0.01 1 $ 0.002 R3 500ohm,0603 0.01 1 $ 0.002 R4 NC 0 0 $ - C1 220uf/35v 0.3 1 $ 0.050 C2, 2.2uf/50v,1206 0.035 1 $ 0.006
C3,C7 100nf/50v,0603 0.01 2 $ 0.003 C5,C6 1uf/16V,0603 0.03 2 $ 0.010
C8 10uf/35v,0805 0.04 1 $ 0.007 C4,C9,C10, NC 0 0 $ -
L12uH/ color ring
inductance0.1 1
$ 0.017 L2 10uh/2A 0.5 1 $ 0.083 L3 100uh/1.2A 0.5 1 $ 0.083
Lm3 NC 0 0 $ - Lm4 1206 120ohm@100MHZ 0.04 1 $ 0.007 F1 Fuse 0.1 1 $ 0.017 U1 AL8820 1
total 26$0.414
(without PCB and U1 )
200 210 220 230 240 250 2600.64
0.66
0.68
0.70
0.72
0.74
0.76
Eff
Input voltage
OSRAM PHILIPS IBL
InputVoltage
(Vac)
Efficiency@230V to 12Vac electrical
transformer
OSRAM (HTM
70/230-240)
Philips (ET-E 105)
IBL(4104.0
0 ）
208 65.75% 66.69% 69.90%
220 68.51% 67.61% 70.69%
230 69.18% 68.18% 71.03%
240 69.67% 69.01% 72.20%
253 70.30% 69.09% 72.65%
Efficiency with ET
200 210 220 230 240 250 2600.90
0.92
0.94
0.96
0.98
1.00
PF
Input voltage
OSRAM PHILIPS IBL
InputVoltag
e(Vac)
PF@230V to 12Vac electrical
transformer
OSRAM
(HTM 70/230-
240)
Philip(ET-E 105)
IBL(4104.0
0 ）
208 0.9726
0.9786
0.9758
220 0.9686
0.9784
0.9731
230 0.9643
0.9828
0.9772
240 0.9593
0.9807
0.9736
253 0.9516
0.9805 0.97
PF with ET
200 210 220 230 240 250 260645
650
655
660
ou
tpu
t cu
rre
nt
Input voltage
OSRAM PHILIPS IBL
InputVoltag
e(Vac)
Output Current(mA)@230V to 12Vac
electrical transformer
OSRAM
(HTM 70/230-
240)
Philip(ET-E 105)
IBL(4104.0
0 ）
208 653.22
653.79
655.21
220 652.54 654 653.9
230 653.39
652.54
653.22
240 653.58
652.32
653.55
253 653.6 653.06 653.8
Line Regulation with ET
OutputVoltage
(V)
Output Current（ mA）@2
30V to 12Vac electrical transformer
OSRAM (HTM
70/230-240)
Philip(ET-E 105)
)
IBL(4104.0
0 ）
6.7 660.87 660.34 660.43
10 652 653.4 653.54
13.4 645 650.14 647.06
6 7 8 9 10 11 12 13 14640
645
650
655
660
665
670
ou
tpu
t cu
rre
nt
output voltage
OSRAM PHILIPS IBL
Load Regulation with ET
Electronic Transformers (230VAC to 12VAC) Performance
Result Brand Model
1 OSRAMET-Z 60
(20-60W)Y
2 OSRAMHTM 70/230-240
(20-70W)Y
3 PhilipsET-E 105(50-105w)
Y
4 PhilipsPrimaline 70 230-
240(20-70w)
Y
5
SELF( 宁波赛
尔富 )
SET105F-2(35-105W)
Y
6 上海申油NO modelInformation
(50w)Y
7 IBL 4104.00 Y
Y stand for NO flicker N stand for flicker
Transformer Compatibility
Electronic Transformers (230VAC to 12VAC) Performance
Result Brand Model
8 佛山照明 EA-HF50(20-50w)
Y
9 OPPLEDB35-220/12
(20-35w)Y
10 三雄 . 极光
(20-60w) Y
11 阳光ET-60E
（ 20-60w ） Y
220Vac to 12Vac electronic transformer compatibility
Electronic Transformers (120VAC to 12VAC) Performance Result
(No flicker) Brand Model
1 LIGHTECHLET75(75W)
Y
2 LIGHTECHLET75 (75W)
Y
3 LIGHTECHLET303 (300W)
Y
4 HatchRS12-60M
(60W)Y
5 HATCHRS12-150
(150W)Y
6 HATCHRS12-30M-LED
(30w)Y
7 Hatch VS12-60W
(60W)Y
Transformer Compatibility
Y stand for NO flicker N stand for flicker
120Vac to 12Vac electronic transformer compatibility
El ectroni c Transformer
Boost ci rcui t
Buck Ci rcui t
120Vac/ 230Vac
Vet
I et
Vboost
VledI l ed
Figure1 Bench circuit with ET
Bench Circuit
Steady State Waveform with ET
Vinac=208Vac Vinac=230Vac Vinac=253Vac
With OSRAM (HTM 70/230-240) and 3LEDS in series
Vinac=208Vac Vinac=230Vac Vinac=253Vac
With Philips (ET-E 105) and 3LEDS in series
Vet Iet Vboost Iled
Vinac=208Vac Vinac=230Vac Vinac=253Vac
With IBL （ 4104.00 ） and 3LEDS in series
Vet Iet Vboost Iled
Steady State Waveform with ET
Start-up Waveform with ET
Vinac=208Vac @ T=40.61ms Vinac=230Vac Vinac=253Vac
With OSRAM (HTM 70/230-240) and 3 LEDS in series
With Philips((ET-E 105) ) and 3LEDS in series
Vinac=208Vac Vinac=230Vac Vinac=253Vac
Vet Iet Vboost Iled
Vinac=208Vac Vinac=230Vac Vinac=253Vac
With IBL （ 4104.00 ） and 3LEDS in series
Vet Iet Vboost Iled
Start-up Waveform with ET
With OSRAM (HTM 70/230-240)
With Philips (ET-E 105)
Vet Iet Vboost Iled
Steady State Waveform with ET and different load
With 2LEDS in series With 3LEDS in series With 4LEDS in series
With 2LEDS in series With 3LEDS in series With 4LEDS in series
Steady State Waveform with ET at Different Load
With 2LEDS in series With 3LEDS in series With 4LEDS in series
With IBL （ 4104.00 ） Vet Iet Vboost Iled
With OSRAM (HTM 70/230-240) Vet Iet Vboost Iled
Open Load Operation Waveform
Short load operation waveform Open load to reload waveform
Short Load Operation Waveform
With OSRAM (HTM 70/230-240)
Short load operation waveform
Vet Iet Vboost Iled
Short load to reload waveform
Thermal Test
IC case temperature =77.7°C ； Ambient temperature=28.2°C
With OSRAM (HTM 70/230-240) and 3LEDS in series
IC
Rectifier
Rectifier
Test condition:
Input voltage :12Vac/60hz;
Output load:3LEDs in series
EMI
Summary
compatible with most of electronic transformers
High PF
High Efficiency
Good line regulation and load regulation
Has output open / short and OTP protection
Low output current ripple