AP3031A Datasheet, PDF (1/11 Pages) BCD Semiconductor Manufacturing Limited – WHITE LED STEP-UP CONVERTER

WHITE LED STEP-UP CONVERTER
General Description
Features
Data Sheet
AP3031A
The AP3031A is an inductor-based DC/DC boost con-
verter designed to drive LED arrays. 1.2A switching
current allows AP3031A to be used in series 10 LEDs
application 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 22µH
inductor and 0.47µF output capacitor for the typical
application is sufficient.
The over output voltage protection is equipped in
AP3031A, which protects the IC under open load con-
dition. The AP3031A includes UVLO, soft-start, cur-
rent limit and OTSD to protect the circuit.
· Fast 1MHz Switching Frequency
· Wide Input Voltage Range: 2.7V to 16V
· Low 200mV Feedback Voltage
· Output Over Voltage Protection:36V
· Cycle by Cycle Current Limit: 1.2A
· Built-in Soft-start
· Built-in Standby Mode to Achieve High Fre-
quency PWM Dimming
· Built-in Thermal Shutdown Function
· Under Voltage Lockout
Applications
The AP3031A is available in standard SOT-23-6 pack- ^{· Digital Photo Frame}
age.
· GPS Receiver
· EPC
· PDVD
May 2009 Rev. 1. 1
SOT-23-6
Figure 1. Package Type of AP3031A
BCD Semiconductor Manufacturing Limited
1