BCD Semiconductor Manufacturing Limited AP3036
The AP3036/A is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series for backlight.GENERAL DESCRIPTION
Only one feedback resistor is needed to control the LED current and obtain required brightness. A constant frequency 1.0MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall inductor and 0.22µF output capacitor for a typical application is sufficient. Additionally, the Schottky diode in boost circuit is integrated on this chip. The AP3036/A also provides a disable pin to ease its use for different systems. The output over-voltage protection is implemented in AP3036/A. When any LED is broken or in other abnormal conditions, the output voltage will be clamped. The AP3036/A is available in standard SOT-23-6 and TSOT-23-6 packages.FEATURES
● Inherently Uniform LED Current● High Efficiency up to 84%
● No Need for External Schottky Diode
● Output Over-voltage Protection (OVP)
● Fixed 1.0MHz Switching Frequency
● Uses Tiny 1mm Tall Inductor
● Requires Only 0.22µF Output Capacitor
● High Frequency Dimming Control
APPLICATIONS
● Cellular Phones● Digital Cameras
● LCD Modules
● GPS Receivers
● PDAs, Handheld Computers SOT-23-6 TSOT-23-6 Jul.