Diodes AP3032 User Manual download pdf

Data Sheet

WHITE LED STEP-UP CONVERTER AP3032

Dec. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

General Description

The AP3032 is an inductor-based DC/DC boost

converter designed to drive up to 4 rows of LEDs

with 7 series for each in parallel for backlight.

A constant frequency 1MHz PWM control scheme is

employed in this IC, which means tiny external

components can be used. Specifically, 1mm tall

6.8μH inductor and 1µF aluminum output capacitor

for the typical application is sufficient.

The over output voltage protection is equipped in

AP3032, which protects the IC under open load

condition. The AP3032 includes UVLO, soft-start,

stand-by mode, current limiting and OTSD to protect

the circuit under over load condition

The AP3032 is available in SOT-23-6 package.

Features

•

Efficiency Up to 81%（V

=5V, I

OUT

=80mA）

• Drives up to 4 Rows of WLEDs with 7 Series

for Each in Parallel (V

=5V)

• Fast 1 MHz Switching Frequency

• Wide Input Voltage Range: 2.7V to 9V

• Low Feedback Voltage: 200mV

• Output Over Voltage Protection

• Cycle-by-cycle Current Limit: 1.4A

• Built in Soft-start

• Built in Standby-mode to Achieve High

• Frequency PWM Dimming

• Built in Thermal Shutdown Function

• Under Voltage Lockout

Applications

• 7’ to 10’ LCD Panels

• Digital Photo Frame

• GPS Receiver

Figure 1. Package Type of AP3032

SOT-23-6

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