AP3612 datasheet(3/18 Pages) BCDSEMI

Part #	AP3612

Description	Boost Type LED Driver with 12-Channel Current Source

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Manufacturer	BCDSEMI [BCD Semiconductor Manufacturing Limited]

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Preliminary Datasheet

Boost Type LED Driver with 12-Channel Current Source

AP3612

Aug. 2012 Rev. 1. 1

BCD Semiconductor Manufacturing Limited

3

Pin Description

Pin Number

Pin Name

Function

HSOP-28

SOIC-24

28,1,2,3,4,5,

8,9,10,11,12 ,14

18,19,20,21, 22,23,

1, 2, 3, 4, 5, 7

CH1 to CH12

LED current sink. Leave the pin open directly

if not used

6, 21,25

NC

No connection

7, 20

24

GND

Ground pin

13

6

ISET

LED current setting pin. The corresponding

maximum current of all strings is set through

connecting a resistor from this pin to GND

15

8

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

16

9

RT

Frequency control pin

17

10

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 3

µA

18

11

CS

Power switch current sense input

19

12

OUT

Boost converter power switch gate output.

This pin output high voltage (5V/VIN-0.5V) to

drive the external N-MOSFET

22

13

VCC

5V linear regulator output pin. This pin should

be bypassed to GND (recommend to connect

with GND pin) with a ceramic capacitor

23

14

VIN

Supply input pin. A capacitor (typical 10

µF)

should be connected between the VIN and

GND to keep the DC input voltage constant

24

15

STATUS

LED operation status output

26

16

COMP

Soft-start and control loop compensation

27

17

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

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