Preliminary Datasheet

2

Jan. 2010 Rev. 1. 0

BCD Semiconductor Manufacturing Limited

WHITE LED STEP-UP CONVERTER

AP3033

Figure 2. Pin Configuration of AP3033 (Top View)

Pin Configuration

Pin Description

Pin Number

Pin Name

Function

1

SW

Switch Pin. Connect external inductor and Schottky

2

GND

Ground Pin

3

FB

Voltage Feedback Pin. Reference voltage is 200mV

4

CTRL

Enable and Dimming Control Pin. Connect to a high input to enable the IC or a low input to

disable the IC. If logic low time is more than about 0.45ms and then enable the IC, the

AP3033 will soft start to protect system departments. If logic low time is less than about

0.45ms and then enable the IC, the AP3033 will hold on standby mode and start directly to

achieve high frequency dimming

5

OV

through a resistor divider to set the OVP voltage. On OVP condition, the output voltage will

be clamped

Input Supply Pin. Must be locally bypassed

(TSOT-23-6)

SW

GND

FB

OV

CTRL

KT Package

1

2

34

5

Pin 1 Dot by Marking

6