AP3064

Document number: DS37485 Rev. 2 - 2

2 of 20

www.diodes.com

September 2015

© Diodes Incorporated

AP3064

Typical Applications Circuit

L

D1

13X4

ON OFF

R15

EN

RT

COMP

VCC

STATUS

GND

ISET

DIM

CH1

OVP

CS

OUT

VIN

CH4

ON OFF

47

mH

STATUS

0.3

W

22

mF

1M

36k

10k

22

mF

10k

120k

2.2

mF

100k

1k

0.22

mF

Q1

300k

600

W@100MHz

22

mF

0.3

W

FB

NC

R7

R8 10k

300k

R14

0

W

NC

C

820pF

Pin Description

Pin Number

Pin Name

Function

SOIC-16

/PSOP-16

DIP-16

QFN-

4×4-16

1

1

3

CH4

LED current sink 4. Leave the pin open directly if not used

2

3

5

ISET

LED current setting pin. The corresponding maximum current of all 4 strings

is set through connecting a resistor from this pin to GND

3

2

4

OVP

Over voltage protection pin. When the OVP pin voltage exceeds 2.0V, the

OVP is triggered and the power switch is turned off. When the OVP pin

voltage drops below hysteresis voltage, the OVP is released and the power

switch will resume normal operation

4

4

6

RT

Frequency control pin

5

5

7

EN

ON/OFF control pin. Forcing this pin above 2.4V enables the IC while below

0.5V shuts down the IC. When the IC is in shutdown mode, all functions are

disabled to decrease the supply current below 3µA

6

6

8

CS

Power switch current sense input

7

7

9

OUT

Boost converter power switch gate output. This pin output high voltage

8

8

10

VCC

5V linear regulator output pin. This pin should be bypassed to GND

(recommend to connect with GND pin) with a ceramic capacitor

9

9

11

VIN

Supply input pin. A capacitor (typical 10µF) should be connected between

10

10

12

STATUS

LED operation status output

11

11

13

COMP

Soft-start and control loop compensation

12

12

14

DIM

PWM dimming control pin.

Adding a PWM signal to this pin to control LED dimming. If not used, connect

it to the high level