Diodes AP3033 - Manual

Preliminary Datasheet
1
Jan. 2010 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
WHITE LED STEP-UP CONVERTER AP3033
General Description
The AP3033 is an inductor-based DC/DC boost con-
verter designed to drive LED arrays. 1.3A switching
current allows AP3033 to be used in different 7' to 10'
LCD panel backlights (3S8P LED arrays typically).
A constant frequency 1MHz PWM control scheme is
employed in this IC, which means tiny external com-
ponents can be used. Specifically, 1mm tall 10
µ H
inductor and 10 µ F output capacitor for the typical
application is sufficient.
The over output voltage protection is equipped in
AP3033, which protects the IC under open load condi-
tion. The AP3033 includes UVLO, soft-start, standby
mode, current limit and OTSD to protect the circuit.
The AP3033 is available in standard TSOT-23-6 pack-
age.
Features
· Up to 92% Efficiency
(V
IN
=9V, I
OUT
=160mA)
· Up to 88% Efficiency
(V
IN
=5V, I
OUT
=160mA)
· Fast 1MHz Switching Frequency
· Wide Input Voltage Range: 3V to 16V
· Low 200mV Feedback Voltage
· Output Over Voltage Protection
· Cycle by Cycle Current Limit: 1.3A
· High Frequency PWM Dimming
· Built-in Soft-start
· Built-in Thermal Shutdown Function
· Under Voltage Lockout
Applications
· 7' to 10' LCD Panels
· Digital Photo Frame
· GPS Receiver
· Netbook
· PDVD
Figure 1. Package Type of AP3033
TSOT-23-6