BCD Semiconductor Manufacturing Limited AP3019A
The AP3019A is an inductor-based DC/DC converter designed to drive up to eight white LEDs in series for backlight. The AP3019A is available in standard SOT-23-6 and TSOT-23-6 packages.| Part No. | AP3019A |
|---|---|
| Datasheet | AP3019A Download |
| Manufacturer |  BCD Semiconductor Manufacturing Limited |
| Description | WHITE LED STEP-UP CONVERTER |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Only one feedback resistor is needed to control the LED current and obtain required brightness. A constant frequency 1.2MHz 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. AP3019A also provides a disable pin to ease its use for different systems. The output over-voltage protection is implemented in AP3019A. When any LED is broken or in other abnormal conditions, the output voltage will be clamped.FEATURES
● Inherently Uniform LED Current● High Efficiency up to 84%
● No Need for External Schottky Diode
● Output Over-voltage Protection (OVP)
● Fixed 1.2MHz Switching Frequency
● Uses Tiny 1mm Tall Inductor
● Requires Only 0.22µF Output Capacitor
APPLICATIONS
● Cellular Phones● Digital Cameras
● LCD modules
● GPS Receivers
● PDAs, Handheld Computers SOT-23-6 TSOT-23-6 Figure 1.
