AP3068 datasheet(2/15 Pages) BCDSEMI

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Preliminary Datasheet

WHITE LED DRIVER FOR LCD PANEL BACKLIGHT

AP3068

May. 2010

Rev. 1.3

BCD Semiconductor Manufacturing Limited

Pin Configuration

G Package

(TSSOP-28 (EDP))

Figure 2. Pin Configuration of AP3068 (Top View)

Pin Description

Pin Number

Pin Name

Function

PGND2

Power ground pin of current sink section

2,3,4,5,

25,26,27,28

CH1 to CH8

White LED cathode connection pin. The current of each channel

can be set from 5mA to 100mA. The channels can be paralleled

for higher current application. These pins should be connected to

GND if not used

PWM

PWM dimming control pin. Add a PWM signal to this pin to

realize PWM dimming control

FBX

This pin is an interface terminal. Connect it with current sink

device for parallel application. Leave it unconnected if not used

ISET

LED current setting pin. An external resistor can be connected to

this pin to set LED current, the full-scale current can be adjusted

from 5mA to100mA

FB2

Feedback pin. This pin is an interface terminal, which samples the

voltage of each channel, and outputs the lowest voltage to DC/DC

controller

FB1

Voltage feedback pin of the boost controller section. The reference

voltage is 500mV

AP3068 Arkusz danych(PDF) 2 Page - BCD Semiconductor Manufacturing Limited