active semi 2014 psg led general lighting applications released

ACT364 DESIGN GUIDE Jun 2014

Copyright © 2014 Active-Semi International, Inc. - - www.active-semi.com

Innovative PowerTM

AC/DC LED Lighting

Rev3.1 Apr 2011

www.active-semi.com

June 2014

www.active-semi.com

PRODUCT SELECTION GUIDE LED Lighting Reference Designs

Innovative LED Solutions Innovative LED Solutions

Table of Contents

ACT364 1W 350mA(3.5V) E27.……………………………………………………………..…………….………3

ACT364 1W 350mA(3.5V) E27 Non-isolated…….………...…….……………………………..…….…...…...5

ACT364 3W 700mA(4V) GU10..…………………………………….…………………………………...………..7

ACT364 3W 700mA(4V) GU10 Non-isolated…………….………………………………….………………….9

ACT364 3W 350mA(12V) GU10………………………….……….………………………………….………11

ACT364 3W 350mA(12V) GU10 Non-isolated..……….……….……………………………………………..13

ACT365 7.8W 350mA(26V) PAR30 ………………….….………………...…………………….……………...15

ACT365 7.8W 350mA(26V) PAR30 Non-isolated…….………….……….….………………….….………...17

ACT512 16.8W 700mA(24V) PAR38 ………………….….………………...………………………….…….19

ACT111A 4.8-30VDC (up to 1.5A) MR16……………………………...………………………………………..21

LED DESIGN GUIDE Innovative PowerTM Jun 2014

Copyright © 2014 Active-Semi International, Inc. - 2 - www.active-semi.com


Innovative PowerTM


(1.1)

OUTCV

SW

2

CSPOUTCC V

F

R

9.0396.0L

2

1I

Input Voltage LED(s) Output Voltage Power Output Topology Device

85 - 264VAC 1 3.5V 1W Flyback ACT364

E27 1x1W LED Lighting

Figure 1:

Schematic of LED Lighting Driver

Operation and Application

Figure 1 is the schematic of an offline LED driver using ACT364 to provide a power output of 3.5V, 350mA. This circuit is a typical flyback type power supply which includes the AC rectified circuit (BD1, C1), power drive circuit (BD pin, Q1), secondary rectified circuit (D3, C4) and the IC(ACT364) control circuit. ACT364 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and voltage without opto-coupler. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base driver for the NPN transistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the peak current sense pin. Through a patented PSR technology, this circuit

can provide drivers for one (min), or two (max) LED lights in series due to the wide VDD operation ranges.

Key Component Selection

The turn ratio of the primary turn and the secondary turn (NP/NS), together with the R7 sets the maximum output current value as shown in formula (1.1). The voltage setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in formula (1.2). NP/NS/NAUX (160/10/23) must be designed correctly to make sure it operates in DCM mode and it can supply either one to two LEDs in same circuit. A design value VOUTCV equal to 3.5V and IOUTCC-MIN equal to 350mA are used to do the design.

NS and NAUX are numbers of transformer secondary and auxiliary turns, and VSEC-R is the rectifier diode forward drop voltage at approximately 0.1A bias.

The peak current limit is set by (0.396×0.9) /RCS.

R_SECAUX

S

REFOUTCVV

N

N)

6R

5R1(VV (1.2)

C4

47µF/

10V

T1 EE10

L1

D3 SB240

R8

3kΩ

*R1

300kΩ

C1

4.7µF

400V

*C2

100pF

*D1 GS1M

FR1 10Ω/1W

BD1

MB6S

L

N

1

4

3

2

VDD

U1

ACT364

SOT23-6

Q1

D13003X

TO-92

R2

10MΩD2

LL4148

R3

22Ω

R4 22Ω

C3

4.7µF

25V

R7

2.8Ω

R6

9.2kΩ

GND CS

FB

SWBD

4

3 1

5

2 6

V+

GND

R5

52.3kΩ

1.5mH

Note: The *R1,*C2,*D1 is optional


Innovative PowerTM


Efficiency vs. Input Voltage

70.00

69.20

68.40

67.60

66.80

66.00

AC

T3

64

-00

1

Effic

iency (

%)

Output Current vs. Input Voltage

340

330

320

310

300

290

280

AC

T3

64

-00

2

Outp

ut

Curr

ent

(mA

) Typical performance Characteristics

EVALUATION KITS VIN I0 LED(s)

ACT364-LED01 85-264VAC 300-350mA 1 or 2

Bill of Materials PCB Top and Bottom Layers

Build Up

REF. DESCRIPTION MFTR.

C1 Capacitor,Electrolytic,4.7µF/400V,8×12mm KSC

C2 Capacitor,Ceramic,100pF/500V,1206,SMD POE

C3 Capacitor,Ceramic,47µF/25V,1206,SMD POE


BD1 Bridge Rectifier,600V/0.5A, MBS06, SDIP PANJIT

D1 Diode,U1tra Fast,GS1M,1000V/1.0A,SMA PANJIT

D2 General Rectifier, LL4148, 100V/1A PANJIT

D3 Diode,schottky,40V/2A,S240,SMA PANJIT

L1 Axial Inductor,1.5mH,0410,Dip SoKa

PCB1 PCB,L*W*T=25.5×14×1.6mm,Rev:A Jintong

FR1 Wire Round Resistor,1W,10ohm,KNP,5% TY-OHM

Q1 Transistor,HFE 15-25,NPN,D13003,TO-92 Huawai

R1 Chip Resistor, 00K ohm,0805,5% TY-OHM

R2 Chip Resistor,10M ohm,1206,5% TY-OHM

R3,4 Chip Resistor,22 ohm,0805,5% TY-OHM

R5 Chip Resistor,52.3K ohm,0805,1% TY-OHM


R7 Chip Resistor,2.8 ohm,1206,5% TY-OHM

R8 Chip Resistor, 3K ohm, 0805, 5% TY-OHM

T1 Transformer, Lp=4.2mH, EE10

U1 IC, ACT364US-T, SOT23-6 ACT

Transformer Specification

Note: P1 and P2 are Primary, S1 is Secondary (Bobbin: EE-10 Horizontal).

ITEM DESCRIPTION CONDITION LIMITS

1 Electrical Strength 50Hz, 1 minute, from Primary and Secondary

3kVAC

2 P1 Inductance Inductance between pin 4 and pin 1 at 1VAC & 1kHz

4.2mH ± 7%

3 P1 Leakage Inductance

Inductance between pin 4 and pin 1 with pins 3-2 and 8-5 shorted

75µH

Electrical Specifications

26mm

14

mm

115VAC 230VAC

90

Input Voltage

110 130 150 170 190 210 230 250

90

Input Voltage

110 130 150 170 190 210 230 250 270

VIN 85VAC VIN 115VAC VIN 230VAC VIN 264VAC

Pin4

Pin2

P1

S1

P2

Pin1

Pin3Pin8

Pin7

Pin2SH1NC

Pin4

S1

8

P1

1

4

P2

3

2

SH1

7

NC

Core(SH2)

Pin4

Reverse

WINDING

TERMINAL

TURNS

WIRE INSULATION

START FINISH TYPE SIZE × QTY

LAYER THICK/WIDE LAYER

P1 1 4 160 2UEW 0.1Φ×1 3 25µ/8.5mm 2

SH2 2 Open 16 2UEW 0.1Φ×3 1 25µ/8.5mm 2

S1 8 7 10 TEXE

Reverse 0.35Φ×1 1 25µ/8.5mm 2

P2 3 2 23 2UEW 0.1Φ×2 2 25µ/8.5mm 2

SH2 Core 4 1 Copper

Wire 0.18Φ×1 1 25µ/8.5mm 2


Innovative PowerTM


(1.1)

OUTCV

SW

2

CSPOUTCC V

F

R

9.0396.0L

2

1I


85 - 264VAC 1 3.5V 1W buck ACT364

E27 1x1W LED Lighting Non-isolated

Figure 1:



Figure 1 is the schematic of an offline LED driver using ACT364 to provide a power output of 3.5V, 350mA. This circuit is tapped buck power supply which includes the AC rectified circuit (BD1, C1), power drive circuit (BD pin, Q1), secondary rectified circuit (D3, C4) and the IC(ACT364) control circuit. ACT364 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and voltage without opto-coupler. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base driver for the NPN transistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the peak current sense pin. Through a patented PSR technology, this circuit can provide

drivers for one (min), or two (max) LED lights in series due to the wide VDD operation ranges.


The turn ratio of the primary turn and the secondary turn (NP/NS), together with the R7 sets the maximum output current value as shown in formula (1.1). The voltage setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in formula (1.2). NP/NAUX

(160/23) must be designed correctly to make sure it operates in DCM mode and it can supply either one to two LEDs in same circuit. A design value VOUTCV equal to 3.5V and IOUTCC-MIN equal to 350mA are used to do the design.



R_SECAUX

S

REFOUTCVV

N

N)

6R

5R1(VV (1.2)

C4

47µF

10V

T1 EE10

L1

R8

3kΩ

*R1

300kΩ

C1

4.7µF

400V

*C2

100pF

*D1 GS1M

FR1 10Ω 1W

BD1

MB6S

L

N

1

4

3

2

VDD

U1

ACT364

SOT23-6

Q1

D13003X

TO-92

R2

10MΩD2

LL4148

R3

22Ω

R4 22Ω

C3

4.7µF

25V R7

2.8Ω

R6

9.2kΩ

GND CS

FB

SWBD

4

3 1

5

2 6

V+

GND

R5

52.3kΩ

1.5mH


D2

SB240


Innovative PowerTM


Typical performance Characteristics


ACT364-LED02 85-264VAC 300-350mA 1 or 2


Build Up






BD1 Bridge Rectifier,600V/0.5A, MBS06, SDIP PANJIT








R1 Chip Resistor, 00K ohm,0805,5% TY-OHM






R8 Chip Resistor, 3K ohm, 0805, 5% TY-OHM

T1 Transformer, Lp=4.2mH, EE10



ITEM DESCRIPTIO

N CONDITION LIMITS


3kVAC

2 P1+P2 Inductance Inductance between pin 8 and pin 1 at 1VAC & 1kHz

4.2mH ± 7%

3 P1+P2 Leakage Inductance

Inductance between pin 4 and pin 8 with pins 3-2 .

75µH


26mm

14

mm

P1

1

4

P3

3

2

SH1

NC

Core(SH2)

Pin4

8

P2

Pin4

Pin2

P1

P2

P3

Pin1

Pin3

Pin8

Pin4

Pin2SH1NC

Pin4 Pin4(SH2)

WINDING

TERMINAL

TURNS

WIRE INSULATION



P1 1 4 150 2UEW 0.1Φ×1 3 25µ/8.5mm 2

P2 4 8 10 2UEW 0.3Φ×1 1 25µ/8.5mm 2

SH1 2 NC 16 2UEW 0.1Φ×3 1 25µ/8.5mm 2

P3 3 2 23 2UEW 0.1Φ×2 2 25µ/8.5mm 2

SH2 Core 4 1 Copper

Wire 0.18Φ×1 1 25µ/8.5mm 2

Note: P1,P2 ,and P3 are Primary (Bobbin: EE-10 ;Vertical).

Figure 2

Figure 1


Innovative PowerTM


R_SECAUX

S

REFOUTCVV

N

N)

6R

5R1(VV (1.2)

OUTCV

SW

2

CSPOUTCC V

F

R

9.0396.0L

2

1I

(1.1)


85 - 264VAC 1 4V 3W Flyback ACT364

GU10 1x3W LED Lighting

Figure 1:

Typical Application Circuit


Figure 1 is the schematic of an offline LED driver using ACT364 to provide a power output of 4V, 650mA. This circuit is a typical flyback type power supply which includes the AC rectified circuit (BD1, L1, C1), primary snubber circuit (D1, R1, C2), power drive circuit (BD pin ,Q1), secondary rectified circuit (D3, C4) and the IC control circuit. ACT364 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and voltage without Opto-couple. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base drive for the NPN transistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the peak current sense pin. Through a patented PSR

technology, this circuit can provide drivers one 3W LED lights in series due to the wide VDD operation ranges.


The turn ratio of the primary turn and the secondary turn (NP/NS), together with the R7 sets the maximum output current value as shown in formula (1.1). The voltage setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in formula (1.2). NP/Ns/NAUX (160/7/22) must be designed correctly to make sure it operates in DCM mode and it can supply one LEDs in same circuit. A design value VOUTCV equal to 4V and IOUTCC_MIN equal to 650mA are used to do the design.



C4

47µF/10V

T1 EE10

L1

D3 S240 SMD

R8

2K/0805

*R1

300K/

0805

C1

4.7µF/400V

8×12

*C2

101/500V 1206

*D1 GS1M SMA

FR1 10/1W

BD1

MBS06 SMD

L

N

1

4

3

2

VDD

U1

ACT364

SOT23-6

1

Q1

D13003X

TO-92

R2

10M/1206

D2

LL4148

R3

22R/0805

R4 22R/0805

C3

4.7µF/25V

1206R7

2R/1206

R6

9.88K/0805

GND CS

FB

SWBD

2

3

4

5

8

4

3 1

5

2 6

V+

GND

R5

51.6K/0805

1.5mH 0410


Innovative PowerTM



Build up


Input Voltage

90 110 130 150 170 190 210 230 250

AC

T3

64

-00

1

Effic

iency (

%)

Output Current vs. Input Voltage

VOUT1 = 1.8V

AC

T3

64

-00

2

Outp

ut

Curr

ent

(mA

)


Typical Performance Characteristics


ACT364-LED03 85-264VAC 650-750mA 1

P1 and P2 are Primary, S1 is Secondary (Bobbin: EE-10 Vertical)



3kVAC


3.2mH ± 7%



75µH


3 LEDs 115VAC 230VAC

85VAC 115VAC 230VAC 264VAC

720

700

680

660

640

620




C3 Capacitor,Ceramic,4.7µF/25V,1206,SMD POE


BD1 Bridge Rectifier,600V/0.5A,MBS06,SDIP PANJIT


D2 General Rectifier,LL4148,100V/1A PANJIT






R1 Chip Resistor,300K ohm,0805,5% TY-OHM





R7 Chip Resistor,2 ohm,1206,5% TY-OHM


T1 Transformer,Lp=3.2mH,EE10

U1 IC,ACT364US-T,SOT23-6 ACT

WINDING

TERMINAL

TURNS

WIRE INSULATION



P1 1 4 160 2UEW 0.1Φ×1 3 25µ/8.5mm 2

SH2 2 NC 16 2UEW 0.1Φ×3 1 25µ/8.5mm 2

S1 8 7 7 TEXE

Reverse 0.35Φ×1 1 25µ/8.5mm 2

P2 3 2 22 2UEW 0.1Φ×2 2 25µ/8.5mm 2

SH2 Core 4 1 Copper

Wire 0.18Φ×1 1 25µ/8.5mm 2

26mm

14

mm

70.00

69.20

68.40

67.60

66.80

66.00

115VAC 230VAC

90

Input Voltage

110 130 150 170 190 210 230 250 270

Pin4

Pin2

P1

S1

P2

Pin1

Pin3Pin8

Pin7

Pin2SH1NC

Pin4

S1

8

P1

1

4

P2

3

2

SH1

7

NC

Core(SH2)

Pin4

Reverse


Innovative PowerTM


R_SECAUX

S

REFOUTCVV

N

N)

6R

5R1(VV (1.2)

OUTCV

SW

2

CSPOUTCC V

F

R

9.0396.0L

2

1I

(1.1)


85 - 264VAC 1 4V 3W buck ACT364

GU10 1x3W LED Lighting Non-isolated

Figure 1:

Typical Application Circuit


Figure 1 is the schematic of an offline LED driver using ACT364 to provide a power output of 4V, 650mA. This circuit is tapped buck power supply which includes the AC rectified circuit (BD1, L1, C1), primary snubber circuit (D1, R1, C2), power drive circuit (BD pin ,Q1), secondary rectified circuit (D3, C4) and the IC control circuit. ACT364 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and voltage without Opto-couple. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base drive for the NPN transistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the peak current sense pin. Through a patented PSR

technology, this circuit can provide drivers one 3W LED lights in series due to the wide VDD operation ranges.


The turn ratio of the primary turn and the secondary turn (NP/NS), together with the R7 sets the maximum output current value as shown in formula (1.1). The voltage setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in formula (1.2). NP/NAUX

(160/22) must be designed correctly to make sure it operates in DCM mode and it can supply one LEDs in same circuit. A design value VOUTCV equal to 4V and IOUTCC_MIN equal to 650mA are used to do the design.



C4

47µF

10V

T1 EE10

L1

R8

2kΩ

*R1

300kΩ

C1

4.7µF

400V

*C2

100pF

*D1 GS1M

FR1 10Ω/1W

BD1

MB6S

L

N

1

4

3

2

VDD

U1

ACT364

SOT23-6

Q1

D13003X

TO-92

R2

10MΩD2

LL4148

R3

22Ω

R4 22Ω

C3

4.7µF

25V R7

2Ω

R6

9.88kΩ

GND CS

FB

SWBD

4

3 1

5

2 6

V+

GND

R5

51.6kΩ

1.5mH


D3

SB240


Innovative PowerTM



Build up




ACT364-LED04 85-264VAC 650-750mA 1



3kVAC


3.2mH ± 7%


Inductance between pin 1 and pin 8 with pins 2-3

75µH









D2 General Rectifier,LL4148,100V/1A PANJIT

D3 Diode,schottky,40V/2A,SB240,SMA PANJIT










R7 Chip Resistor,2 ohm,1206,5% TY-OHM



U1 IC,ACT364US-T,SOT23-6 ACT

26mm

14

mm

P1

1

4

P3

3

2

SH1

NC

Core(SH2)

Pin4

8

P2Pin4

Pin2

P1

P2

P3

Pin1

Pin3

Pin8

Pin4

Pin2SH1NC

Pin4 Pin4(SH2)

Figure 1

Figure 2 WINDING

TERMINAL

TURNS

WIRE INSULATION



P1 1 4 153 2UEW 0.1Φ×1 3 25µ/8.5mm 2

P2 4 8 7 2UEW 0.35Φ×1 1 25µ/8.5mm 2

SH1 2 NC 16 2UEW 0.1Φ×3 1 25µ/8.5mm 2

P3 3 2 22 2UEW 0.1Φ×2 2 25µ/8.5mm 2

SH2 Core 4 1 Copper

Wire 0.18Φ×1 1 25µ/8.5mm 2

Note: P1,P2, and P3 are Primary (Bobbin: EE-10; Vertical).

680685690695700705710715720725730735740

90 115 160 230 264

Ou

tpu

t C

urr

en

t(m

A)

Input Voltage

Output Current VS.Load

66.00%

68.00%

70.00%

72.00%

74.00%

76.00%

78.00%

110 135 160 185 210 235

Eff

icie

ncy

Vin

Average Efficiency Vs Vin

Efficiency Vs Vin 115V,230"



Innovative PowerTM

OUTCV

SW

2

CSPOUTCC V

F

R

9.0396.0L

2

1I

(1.1)


85 - 264VAC 3 12V 3W Flyback ACT364

GU10 3x1W LED Lighting

Figure 1:



Figure 1 is the schematic of an offline LED driver using ACT364 to provide a power output of 12V, 350mA. This circuit is a typical flyback type power supply which includes the AC rectified circuit (BD1, C1, L1), primary snubber circuit (D1, R1, C2), power drive circuit (BD pin, Q1), secondary rectified circuit (D3, C4) and the IC control circuit. ACT364 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and voltage without Opto-coupler. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base drive for the NPN transistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the

peak current sense pin. Through a patented PSR technology, this circuit can provide drivers for two (min), or three (max) LED lights in series due to the wide VDD operation ranges.


The turn ratio of the primary turn and the secondary turn (NP/NS), together with the R7 sets the maximum output current value as shown in formula (1.1). The voltage setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in formula (1.2). NP/NS/NAUX (160/20/24) must be designed correctly to make sure it operates in DCM mode and it can supply either two or three LEDs in same circuit. A design value VOUTCV equal to 12V and IOUTCC MIN equal to 300mA are used to do the design.

NS and NAUX are numbers of transformer secondary and auxiliary turns, and VSEC R is the rectifier diode forward drop voltage at approximately 0.1A bias.

The peak current limit is set by (0.396×0.9)/RCS.

R_SECAUX

S

REFOUTCVV

N

N)

6R

5R1(VV (1.2)

C4

10µF

16V

L1

R8

10kΩ

*R1

300kΩ

C1

4.7µF

400V

*C2

100pF

*D1 GS1M

FR1 10Ω/1W

BD1

MB6S

L

N

1

4

3

2

VDD

U1

ACT364

SOT23-6

Q1

D13003X

TO-92

R2

10MΩD2

LL4148

R3

22Ω

R4 22Ω

C3

4.7µF

25V R7

1.4Ω

R6

9.2kΩ

GND CS

FB

SWBD

4

3 1

5

2 6

V+

GND

R5

52.3kΩ

1.5mH


C5

2.2µF

400V

T1 EE10

D3 SB2B0



Innovative PowerTM


Build Up




ACT364-LED05 85-264VAC 280-350mA 2 or 3

Note: P1 and P2 are Primary, S1 is Secondary (Bobbin: EE-10 Vertical).



3kVAC


2.1mH ± 7%



75µH



76

74

72

70

68

AC

T3

64

-00

1

Effic

iency (

%)


115VAC 230VAC

Output Current vs. Load 360

350

340

330

320

310

300

290

280

AC

T3

64

-00

2

Outp

ut

Curr

ent

(mA

)






C5 Capacitor,Electrolytic,2.2µF/400V,6.2×12mm KSC








Q1 Transistor,HFE15-25,NPN,D13003,TO-92 Huawai










26mm

14

mm

WINDING

TERMINAL

TURNS

WIRE INSULATION



P1 1 4 160 2UEW 0.1Φ×1 3 25µ/8.5mm 2

SH1 2 Open 16 2UEW 0.1Φ×3 1 25µ/8.5mm 2

S1 8 7 20 TEXE

Reverse 0.25Φ×1 1 25µ/8.5mm 2

P2 3 2 24 2UEW 0.1Φ×2 2 25µ/8.5mm 2

SH2 Core 4 1 Copper

Wire 0.18Φ×1 1 25µ/8.5mm 2

90

Input Voltage

110 130 150 170 190 210 230 250

90

Input Voltage

110 130 150 170 190 210 230 250

230VAC 115VAC

270


Pin4

Pin2

P1

S1

P2

Pin1

Pin3Pin8

Pin7

Pin2SH1NC

Pin4

S1

8

P1

1

4

P2

3

2

SH1

7

NC

Core(SH2)

Pin4

Reverse


Innovative PowerTM


OUTCV

SW

2

CSPOUTCC V

F

R

9.0396.0L

2

1I

(1.1)


85 - 264VAC 3 12V 3W buck ACT364

GU10 3x1W LED Lighting No-isolated

Figure 1:



Figure 1 is the schematic of an offline LED driver using ACT364 to provide a power output of 12V, 350mA. This circuit is tapped buck power supply which includes the AC rectified circuit (BD1, C1, L1), primary snubber circuit (D1, R1, C2), power drive circuit (BD pin, Q1), secondary rectified circuit (D3, C4) and the IC control circuit. ACT364 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and voltage without Opto-coupler. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base drive for the NPN transistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the

peak current sense pin. Through a patented PSR technology, this circuit can provide drivers for two (min), or three (max) LED lights in series due to the wide VDD operation ranges.


The turn ratio of the primary turn and the secondary turn (NP/NAUX), together with the R7 sets the maximum output current value as shown in formula (1.1). The voltage setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in formula (1.2). NP/NAUX

(160/24) must be designed correctly to make sure it operates in DCM mode and it can supply either two or three LEDs in same circuit. A design value VOUT-

CV equal to 12V and IOUTCC MIN equal to 300mA are used to do the design.

NS and NAUX are numbers of transformer secondary and auxiliary turns, and VSEC R is the rectifier diode forward drop voltage at approximately 0.1A bias.

The peak current limit is set by (0.396×0.9)/RCS.

R_SECAUX

S

REFOUTCVV

N

N)

6R

5R1(VV (1.2)

C4

10µF

16V

T1 EE10

L1

R8

10kΩ

*R1

300kΩ

C1

4.7µF

400V

*C2

100pF

*D1 GS1M

FR1 10Ω/1W

BD1

MB6S

L

N

1

4

3

2

VDD

U1

ACT364

SOT23-6

Q1

D13003X

TO-92

R2

10MΩD2

LL4148

R3

22Ω

R4 22Ω

C3

4.7µF

25V R7

1.4Ω

R6

9.2kΩ

GND CS

FB

SWBD

4

3 1

5

2 6

V+

GND

R5

52.3kΩ

1.5mH


D3

SB2B0

C5

2.2µF

400V


Innovative PowerTM



Build Up




ACT364-LED06 85-264VAC 280-350mA 2 or 3

Note: P1 and P2 and P3 are Primary (Bobbin: EE-10 ;Vertical).



3kVAC


2.1mH ± 7%


Inductance between pin 1 and pin 8 with pins 2-3 . shorted

75µH







C5 Capacitor,Electrolytic,2.2µF/400V,6.2×12mm KSC




D3 Diode,schottky,200V/1A,SB2B0,SMA PANJIT




Q1 Transistor,HFE15-25,NPN,D13003,TO-92 Huawai










26mm

14

mm

WINDING

TERMINAL

TURNS

WIRE INSULATION



P1 1 4 140 2UEW 0.1Φ×1 3 25µ/8.5mm 2

P2 4 8 20 2UEW 0.3Φ×1 1 25µ/8.5mm 2

SH1 2 NC 16 2UEW 0.1Φ×3 1 25µ/8.5mm 2

P3 3 2 24 2UEW 0.1Φ×2 2 25µ/8.5mm 2

SH2 Core 4 1 Copper

Wire 0.18Φ×1 1 25µ/8.5mm 2

Figure 1

Figure 2

P1

1

4

P3

3

2

SH1

NC

Core(SH2)

Pin4

8

P2Pin4

Pin2

P1

P2

P3

Pin1

Pin3

Pin8

Pin4

Pin2SH1NC

Pin4 Pin4(SH2)

70.00%72.00%74.00%76.00%78.00%80.00%82.00%84.00%86.00%

110 135 160 185 210 235

Eff

icie

ncy

Vin

Average Efficiency Vs Vin

Efficiency Vs Vin 115V,230"

300305310315320325330335340345350

90 115 160 230 264

Ou

tpu

t C

urr

en

t(m

A)

Input Voltage

Output Current VS.Load


Innovative PowerTM


(2)

(1)

Input Voltage LED(s) Output Voltage Power Output Topology Device Transformer

85 - 264VAC 7 26V 7.8W Flyback ACT365 EE16

PAR30 7x1W LED Lighting

Figure 1:


Operation and Application Figure 1 is the schematic of LED lighting us-

ing ACT365 to provide output power of 26V300mA with PF>0.77.This circuit is a typical flyback power supply which includes the AC rectified circuit(BD1,C2, C3),power drive circuit (BD pin, Q1),power factor rectified circuit (D1-D3,C2,C3),secondary rectified circuit (D6, C7,C8) and the IC control circuit. ACT365 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and volt-age without Opto-coupler. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base drive for the NPN tran-sistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the peak current sense pin. Resistance of R10 determines the output DC cord compensation percentage. Through a patented PSR technology, this cir-cuit can provide drivers for five(min), or seven (max) LED lights in series due to the wide VDD operation ranges.

Key Component Selection The maximum output current is decided by formula (1).

Lp is the transformer inductance value, Rcs is the current sense resistor, which is shown as R9 in the schematic. Fsw is the switching

frequency, which design value is 75kHz. η is the overall system efficiency, which value is approximately equal to 75%. Voutcc is the output voltage, which setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in for-mula (2).

Np/Ns/Naux (102/23/13) must be designed correctly to ensure it operates in DCM in all conditions. A design value Voutcc equal to 26V and Ioutcc_min equal to 300mA are used to do the design. Ns and Naux are number of turns of secondary and auxiliary of the transformer. VSEC_R is the forward volt-age drop of the output rectifier diode at ap-proximately 0.1A bias. The peak current limit is set by (0.396×0.9)/Rcs.

)V

F()

R

396.0*9.0(L

2

1I

OUTCC

SW2

CS

POUTCC

R_SEC

AUX

S

6

5REFOUTCC V

N

N)

R

R1(VV

T1 EE16

D6 HER104

VDDU1

ACT365

1

R1 22Ω

C5

10µF/

35V R9

0.67Ω

R6

8.66kΩ

GND CS

FB

SWBD

4

2

5

10

9

6

8 1

5

2,4,7 3

V+

GND

R7 5MΩ

R5

51.1kΩ

D2 1N4007

R3

300kΩ

C4

1000pF/

1KV

C6

C9

102/400VAC

LED1

LED7DB1

B6S

C2

22

µF

/40

0V

C3

22u

F/4

00

V

D1

1N

40

07

D3

1N

40

07

D5

FR

10

2

R8 5MΩ

R10 330kΩ

R4

22

Ω

Q1

13

00

3

D4 FR107

R11

C7

47

µF

/50V

C8

47µ

F/5

0V

10Ω 1000pF

F1 1A 250V

L

C1-2

0.1

µFL1 1.5mH

L2 680µH

R12 4k

C1

-1 0

.1µ

F

R13

10kΩ

N


Innovative PowerTM


EVALUATION KITS

VIN VO Io

ACT365-LED01 85-264VAC 26V 300-400mA

Bill of Materials

Build up

REF DESCRIPTION MFTR

C1-1/2 X1 Capacitor,0.1µF/400V,13x6x11mm USE

C2,C3 Capacitor,Electrolytic, 22µF/250V, 10x14mm KSC

C4 Capacitor,Ceramic,1000pF/1KV, DIP POE

C5 Capacitor,Electrolytic,10µF/35V, 5x11mm KSC

C6 Capacitor,Ceramic,1000pF/50V,1206 POE

C7,C8 Capacitor,Electrolytic, 47µF/50V, 6.3x12mm KSC

C9 Y cap,1000pF/275V,Dip USE

BD1 Bridge,B6S,600V/0.5A,MDI,SMD PANJIT

D1~D3 Fast Recovery Rectifiers,1N4007, DO-41 Good-Ark

D4 Fast Recovery Rectifier ,FR107,DO-41 Good-Ark


D6 Efficiency Rectifiers, 300V/1A ,HER104, DO-41 Good-Ark L1 Axial Inductor,1.5mH, ¢5x7mm,Dip SoKa

L2 I-shaped Inductor,680µH,0410,Dip SoKa

Q1 Transistor, HFE 20-25 NPN, D13003, TO-126 Huawei

PCB1 PCB, ACT365_LED_01,Rev:A Jintong

F1 Fuse:3.15A 250V 3.6*10mm With Pigtail walter

R1,R4 Chip Resistor, 22Ω, 0805, 5% TY-OHM

R3 Chip Resistor, 300kΩ, 1W, 5% TY-OHM

R5 Chip Resistor, 51.1kΩ, 0805,1% TY-OHM

R6 Chip Resistor, 8.66kΩ, 0805, 1% TY-OHM

R7,R8 Chip Resistor, 5MΩ, 0805 , 5% TY-OHM

R9 Chip Resistor, 0.67Ω, 1206,1% TY-OHM

R10 Chip Resistor, 330kΩ, 1/4W, 5% TY-OHM

R11 Chip Resistor, 10Ω, 0805, 5% TY-OHM


R13 Chip Resistor, 10kΩ, 0805, 5% TY-OHM

T1 Transformer, Lp=1.0mH, EE16, Vertical

U1 IC, ACT365SH-T ,SOP-8

Transformer Specifica-

Note: SH1,SH2,and SH3 are shielding; P1 and P2 are Primary, S1 is Secondary (Bobbin: EE-16, Vertical).



3kVAC


1.0mH ± 7%


Inductance between pins 2 and pin 5 with pins 4-1 and 8-10 shorted

75µH


WINDING

TERMINAL

TURNS

WIRE INSULATION


LAYER THICK/WIDE LAYE

R

SH1 4 NC 14 2UEW 0.12Φ*4 1 0.025*8.5W 2

P1 2 5 102 2UEW 0.23Φ*1 3 0.025*8.5W 2

SH2 4 NC 14 2UEW Reverse 0.12Φ*4 1 0.025*8.5W 2

S1 8 10 23 TEX-E 0.35Φ*1 1 0.025*8.5W 2

P2 1 4 13 2UEW 0.12Φ*2 1 0.025*8.5W 2

SH3 core 4 3 conductor 0.15Φ*1 1 0.025*10 8


S1

10

P2

1

4

P1

5

2

SH

1 8

NC NC

SH

2

Core

SH3

Reverse

Pin4

NC

Pin4

SH1

S1

P2

Pin4

108

SH2

Pin2

Pin5

Pin4NC

Pin1

P1

Pin4

Core

PCB Layout

EFFICIENCY

LINE AND LOAD REGULATION

PFC TEST

HARMONIC CURRENT

200

220

240

260

280

300

320

340

360

380

90 115 230 264

Io(m

A)

Input voltage(V)

CV Regulation


Innovative PowerTM


(2)

(1)


85 - 264VAC 7 26V 7.8W Flyback ACT365 EE16

PAR30 7x1W LED Lighting Non-isolated

Figure 1:


Operation and Application Figure 1 is the schematic of LED lighting using ACT365 to provide output power of 26V300mA with PF>0.77.This circuit is a typical flyback power supply which includes the AC rectified circuit(BD1,C2, C3),power drive circuit (BD pin, Q1),power factor rectified circuit (D1-D3,C2,C3),secondary rectified circuit (D6, C7,C8) and the IC control circuit. ACT365 is a Primary Side Regulator (PSR) so that the power supply unit can regulate current and volt-age without Opto-coupler. Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the base drive for the NPN tran-sistor. Pin 1 is the switching pin. Pin 5 is the feedback pin that senses the output current and output voltage. Pin 6 is the peak current sense pin. Resistance of R10 determines the output DC cord compensation percentage. Through a patented PSR technology, this cir-cuit can provide drivers for five(min), or seven (max) LED lights in series due to the wide VDD operation ranges.


Lp is the transformer inductance value, Rcs is the current sense resistor, which is shown as R9 in the schematic. Fsw is the switching

frequency, which design value is 75kHz. η is the overall system efficiency, which value is approximately equal to 75%. Voutcc is the output voltage, which setting is through the flyback voltage of auxiliary winding and the feedback resistor R5, R6 as shown in for-mula (2).

Np/Ns/Naux (102/23/13) must be designed correctly to ensure it operates in DCM in all conditions. A design value Voutcc equal to 26V and Ioutcc_min equal to 300mA are used to do the design. Ns and Naux are number of turns of secondary and auxiliary of the transformer. VSEC_R is the forward volt-age drop of the output rectifier diode at ap-proximately 0.1A bias. The peak current limit is set by (0.396×0.9)/Rcs.

)V

F()

R

396.0*9.0(L

2

1I

OUTCC

SW2

CS

POUTCC

R_SEC

AUX

S

6

5REFOUTCC V

N

N)

R

R1(VV

VDDU1

ACT365

R1 22R

C5

10µF/

35V R9

0.67Ω

R6

8.66kΩ

GND CS

FB

SWBD

6

8 1

5

2,4,7 3

R7 5MΩ

R5

51.1kΩ

R3

300kΩ

C4

1000pF/

1kV

D5

FR

10

2

R8 5MΩ

R10 330kΩ

R4

22

Ω

Q1

13

00

3

D4 FR107

C7

47µF

50V

V+

GND

C8

47µF

50V

LED1

LED7

T1 EE16

D6

SB2B0R13

10kΩ

D2 1N4007DB1

B6S

C2

22µ

F/4

00

V

C3

22

uF

/40

0V

D1

1N

40

07

D3

1N

40

07

F1 1A 250V

L

C1

-2 0

.1µ

FL1 1.5mH

L2 680µH

R12 4k

C1-1

0.1

µF

N


Innovative PowerTM


EVALUATION KITS

VIN VO Io

ACT365-LED02 85-264VAC 26V 300-400mA

Bill of Materials

Build up


C1-1/2 X1 Capacitor,0.1µF/400V,13x6x11mm USE

C2,C3 Capacitor,Electrolytic, 22µF/250V, 10x14mm KSC

C4 Capacitor,Ceramic,1000pF/1KV, DIP POE

C5 Capacitor,Electrolytic,10µF/35V, 5x11mm KSC

C6 Capacitor,Ceramic,1000pF/50V,1206 POE

C7,C8 Capacitor,Electrolytic, 47µF/50V, 6.3x12mm KSC

C9 Y cap,1000pF/275V,Dip USE

BD1 Bridge,B6S,600V/0.5A,MDI,SMD PANJIT

D1~D3 Fast Recovery Rectifiers,1N4007, DO-41 Good-Ark



D6 Efficiency Rectifiers, 300V/1A ,HER104, DO-41 Good-Ark L1 Axial Inductor,1.5mH, ¢5x7mm,Dip SoKa

L2 I-shaped Inductor,680µH,0410,Dip SoKa

Q1 Transistor, HFE 20-25 NPN, D13003, TO-126 Huawei

PCB1 PCB, ACT365_LED_01,Rev:A Jintong

F1 Fuse:3.15A 250V 3.6*10mm With Pigtail walter

R1,R4 Chip Resistor, 22Ω, 0805, 5% TY-OHM

R3 Chip Resistor, 300kΩ, 1W, 5% TY-OHM

R5 Chip Resistor, 51.1kΩ, 0805,1% TY-OHM


R7,R8 Chip Resistor, 5MΩ, 0805 , 5% TY-OHM

R9 Chip Resistor, 0.67Ω, 1206,1% TY-OHM

R10 Chip Resistor, 330kΩ, 1/4W, 5% TY-OHM



R13 Chip Resistor, 10kΩ, 0805, 5% TY-OHM

T1 Transformer, Lp=1.0mH, EE16, Vertical

U1 IC, ACT365SH-T ,SOP-8


Note: SH1,SH2,and SH3 are shielding; P1,P2 and P3 are Primary, (Bobbin: EE-16, Vertical).



3kVAC


2.0mH ± 7%


Inductance between pins 2 and pin8 with pins 4-1 shorted

75µH


WINDING

TERMINAL

TURNS

WIRE INSULATION



R

SH1 4 NC 14 2UEW 0.12Φ*4 1 0.025*8.5W 2

P1 2 5 80 2UEW 0.2Φ*1 2 0.025*8.5W 2

P2 5 8 23 2UEW 0.35Φ*1 1 0.025*8.5W 2

SH2 4 NC 14 2UEW 0.12Φ*4 1 0.025*8.5W 2

S1 8 10 23 2UEW 0.35Φ*1 1 0.025*8.5W 2

P3 1 4 13 2UEW 0.12Φ*2 1 0.025*8.5W 2



PCB Layout

EFFICIENCY


PFC TEST

HARMONIC CURRENT

P3

1

4

P1

5

2

SH

1

NC NC

SH

2

Core

SH3

Pin4

8

P2

NC

Pin4

SH1

P2

P3

Pin4

85

SH2

Pin2

Pin5

Pin4NCPin1

P1

Pin4

Core


Innovative PowerTM


(2)


85 - 264VAC 7 24V 16.8W Flyback ACT512 EF20

PAR38 7x3W LED Lighting

Figure 1:


Operation and Application Figure 1 is the schematic of LED lighting using ACT512 to provide output power of 24V700mA with PF>0.9.This circuit is a typical flyback power sup-ply which includes the AC rectified circuit(D1-D4,C1A, C1),power drive circuit (GATE pin, Q1),power factor rectified circuit (D9-D11,C1A,C1),secondary rectified circuit (D8, C9,C10) and the IC control circuit. ACT512 is a CCM & Quasi-Resonant PWM Controller . Pin 4 and Pin 2 are the VDD and ground pins to provide power for the IC. Pin 3 is the gate drive pin for the MOSFET. Pin 1 is the Current Sense Pin. Pin 5 is the Valley Detector Pin. Pin 6 is the Feedback Pin.

This circuit can provide drivers for five (min), or seven (max) LED lights in series due to the wide VDD operation ranges. Accurate current control is through R12/R13 and LM358 control circuit.


Its output voltage or number of LED is roughly decided by formula (2).

The transformer design procedure can refer to the design example section of ACT512 DS. In this design, Np/Ns/Naux is set as 80/36/25 to ensure it operates in CCM to im-prove efficiency. Independent Output Short Protection, OTP, OVP, Brown Out Protection, Rcs Short/Open Protection, Transformer Winding Short Protection, Output Diode Short/Open Protection, Open Loop Protec-tion, are integrated to protect damage on cir-cuits and LED die itself.

C9

470µF

35V

L1

UU9.8

30mH

D8 SB10200

R17

5KΩ

R2

510kΩ

C3

1000pF

C1

22µF

250V

CS

U1

ACT512US-T

SOT23-6

GND FB

VDDGATE

1

3 4

2

GND

VDET5

R6 1.1ΩR1

1MΩ

R2

1MΩ

D5

RS1M

D6

RS1M

R5

4.7Ω

C7

100pF

50V

C4

6.8µF

35VR8

8.25kΩ

R7

54.9kΩ

R4 100Ω

U4

TL431A

C8

1000pF/200VR24 10Ω

C10

470µF

35V

NTC

5RS5C

L

N

D1-D4

R11

3.3kΩ

6

D11

Q1

4N65

CX1

0.1uF

400V

F1

2A

250Vac

TVS

10471

U2B

R12 0.22Ω

R18 20kΩ

R14

18kΩ

C12

0.1µF

50V

CY1

2200pF

400Vac

R10

22Ω

R9

330Ω

D7

L4148

V+

LF2

200µH

Bead T3.5*9

D9

D10

C1A

22µF

250V

8

7

6

5 4

3

2

1VCC

OUT2

IN2-

IN2+ GND

IN1+

IN1-

OUT1

L2 3uH

U2A

U3

LM358R19

1kΩ

R23

20kΩ

R20

10kΩ

R21

88.7kΩ

C11 0.1µF

R22

510Ω

R15

14KΩ

R16

470Ω

R13 0.22Ω

D9

13R//12R15R

16R5.2Ioutcc

13R//12R*Io*

20R

21R

20R

20R21R*5.2Voutcv

(1)


Innovative PowerTM


EVALUATION KITS

VIN VO Io

ACT512-LED01 85-264VAC 24V 700-720mA

Bill of Materials

Build up


Note: SH1,SH2are shielding; P1,P2 and P3 are Primary, (Bobbin: EF-20, level).



3kVAC


0.82mH ± 7%


Inductance between pins 2 and pin3 with pins 4-1 shorted

75µH


WINDING

TERMINAL

TURNS

WIRE INSULATION



R

P1 3 5 40 2UEW 0.28Φ*1 1 0.025*11W 2

SH1 NC 1 0.9 copper 10mm 1 0.025*11W

S1 9 10 36 TEX-E 0.4Φ*1 2 0.025*11W 2

P2 4 1 25 2UEW 0.15Φ*2 1 0.025*11W 2

P3 5 2 40 2UEW 0.28Φ*1 1 0.025*11W 2



PCB Layout

EFFICIENCY


PFC TEST

HARMONIC CURRENT


IC1 IC, ACT512, SOT23-6 Active-Semi

C1A Capacitor, Electrolytic, 22µF/250V, 10 × 16mm KSC

C1 Capacitor, Electrolytic,22µF/250V, 10 × 16mm KSC

C3 Capacitor, Ceramic,1000pF/0.5KV,SMD POE

C4 Capacitor, Electrolytic,6.8µF/35V,5*11mm KSC

C7 Capacitor, Ceramic, 1000PF/50V,0805,SMD POE

C8 Capacitor, Ceramic, 1000PF/100V,0805,SMD POE

C9,C10 Capacitor, Electrolytic,470µF/35V,8*16mm POE

C11,C12 Capacitor, Ceramic,0.1uF/50V,0805,SMD POE

D1-D4,D9-D11 Diode, 1N4007,1A1000V DO-41 Good-Ark

D5,D6 RS1M SMD Good-Ark

D7 Diode L4148 SMD Good-Ark

D8 Diode, Schottky, 200V/10A, SBR10200, DO-220 Good-Ark

LF1 CM Inductor, 20mH, UU9.8 SoKa

LF2 Axial Inductor, 0.55*5T, 5*7,Dip 200uH SoKa

L2 DM Inductor, 3µH, R5 SoKa

Q1 Mosfet Transisor, 04N65, TO-220 ST

PCB1 PCB, L*W*T =49x68x1.6mm, Cem-1, Rev:A Jintong

F1 Fusible, 2A/250V TY-OHM

R1,R2 Chip Resistor,1M, SMD 0805, 5% TY-OHM

R3 metal Resistor,400K Ω,1206,5% TY-OHM


R5 Chip Resistor,4.7Ω, 0805, 5% TY-OHM

R6 Chip Resistor,1Ω,1206, 1% TY-OHM

R7 Chip Resistor, 78KΩ, 0805, 1% TY-OHM

R8 Chip Resistor, 11.7KΩ, 0805, 1% TY-OHM

R9 Chip Resistor, 330Ω,0805, 5% TY-OHM

R10 Chip Resistor, 22Ω,0805, 5% TY-OHM

R11 Chip Resistor, 6KΩ,0805, 5% TY-OHM

R12,R13 Chip Resistor, 0.22Ω, 1206, 5% TY-OHM

R14 Chip Resistor, 18KΩ, 0805, 5% TY-OHM

R15 Chip Resistor,14KΩ, 0805,5% TY-OHM

R16 Chip Resistor,510Ω, 0805,1% TY-OHM

R17 Chip Resistor,5KΩ, 0805, 5% TY-OHM

R18,R23 Chip Resistor,20KΩ, 0805, 5% TY-OHM

R19 Chip Resistor,1KΩ, 0805, 5% TY-OHM





T1 EF20 ACT

CX1 X capacitance, 0.1µF/400V,X1

NTC Thermistor, SC053

TVS Varistor, 7D471

CY1 Y capacitance, 1000pF/400V,Y1 SEC

IC2 Opto-coupler, PC817C CTR=200 dip-4 Sharp

IC3 IC LM358 SOP-8 ST

IC4 Voltage Regulator, TL431A, Vref=2.5V TO-92 ST

P13

10

9P24

SH1

S1

1

NC

P352

5

1

S1

P2

2

5

P1

3

SH

1

NC

4

1

P3

9

10

ACT111A High Efficiency, Low Cost HB LED Lighting

Design Features

For AC input, if a conventional step-down line trans-

former is used, a low cost IN4001can be used for D1-D4.

However, if a high frequency electronic transformer is

used, a Schottky diode such as SS14 should be used for

high efficiency operation. For input and output capaci-

tors, small size and low ESR ceramic capacitor is pre-

ferred.

PC Board Layout Guidance

Place input capacitor (C1) to IN pin, inductor (L1) and

diode (D5) to SW pin as close as possible to reduce the

voltage ringing at these pins. Place the current sense

resistor (R2 ) close to FB pin. Minimize ground noise by

connecting high current ground returns, the input capaci-

tor ground lead, and the output filter ground lead to a

single point (star ground configuration). There are two

power loops in normal operation, one is formed when the

SW is high and the high current flows through input ca-

pacitor (C1), internal MOSFET, inductor(L1), LEDs,

RSENSE(R2) to ground. The other loop is through inductor

(L1), LEDs, RSENSE(R2), ground to diode(D5). Make these

loop areas as small as possible to minimize noise inter-

action.

95% Efficiency

4.8V to 30V Input and up to 1.5A Output

1.4 MHz Switching & Small SOT23-6 Package

PWM (0-100%, 0.1-10kHz) Dimming

Thermal Shutdown & Short Circuit Protection


The bridge rectifier is for AC input only. The DC input is

directly connected to IN and ground. The ACT111A has an

under-voltage lockout (UVLO) at 4.0V with 250mV hys-

teresis. When input voltage falls below 4.0V, SW stops

switching. The device is activated as input voltage goes

higher than 4.2V.

The LED output current is sensed by a resistor in series

with the LED. The ACT111A precisely regulates the LED

current by the internal EA and 0.1V reference. The aver-

age LED current is determined by the equation: ILED =0.1V/

RSENSE.

The ACT111A allows dimming with a PWM signal at the

DIM pin. A signal level above 1.5V enables switching and

turns LED on. To turn off the LED current, the signal level

has to be below 1.52V. The dimming signal frequency

range is from 100Hz to 10kHz.A 200kΩ resistor is needed

to connect between FB pin RSENSE. A 100pF capacitor is

recommended to connect from the FB pin to ground.

Input Voltage LED # Output Current VFB Topology

4.8 – 30VDC 1-6 1.5A 100mV Buck

An inductor with RMS rating greater than load current

and its saturation current at least 30% higher should be

used. Inductance value is selected to make its ripple

current 20-30% of the load current. A Schottky diode

(D5) is usually used for better efficiency as long as the

breakdown voltage can withstand the maximum output

voltage. The forward current rating of the diode must

be at least equal to the maximum LED current.


Circuit Bottom View Circuit Top View

Innovative PowerTM


ACT111A High Efficiency, Low Cost HB LED Lighting

Bill of Materials

PCB Bottom Layer

Typical performance characteristics

Ref. Description Mftr

C1 Capacitor Tantalum,100uF/16V, D Case AVX

C2 Capacitor, Ceramic,0.01uF/50V,0603 POE

C3 Capacitor, Ceramic,100pF/25V,0603 POE

C4 Capacitor Ceramic,10uF/16V,1206 AVX

D1-D4 Diode shottoky, 40V/1A, SS14, SMA PANJIT

D5 Schottky Barrier Rectifier,SR24,40V/2.0A,SMB PANJIT

ZD1 Diode Zener,GLZ13A,13V, 0.5W, MINI-MELF PANJIT

R1 Meter Film Resistor, 30KΩ,0603, 5% TY-OHM

R2 Meter Film Resistor, 0.28Ω,1206, 1% TY-OHM

R4 Meter Film Resistor, 510Ω,1206, 5% TY-OHM

L1 SMD Power Inductor,SR0604220ML,10uH,±20% QianRu

U1 IC,ACT111,SOT23-6 Active

Schematic ( VIN=12VDC or AC, 3x350mA LEDs )

PCB Top Layer

Innovative PowerTM


active semi 2014 psg led general lighting applications released

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