Preliminary Datasheet WHITE LED STEP-UP CONVERTER General Description
The AP3019 is an inductor-based DC/DC converter designed to drive up to five white LEDs in series for backlight.
Only one feedback resistor is needed to control the LED current and obtain satisfied brightness.
A constant frequency 1.
0MHz PWM control scheme is employed in this IC, which means the tiny external components can be used.
In fact, 1mm tall inductor and 0.
22µF output capacitor for the typical application is very appropriate.
Additionally, the
schottky diode in boost circuit is integrated in this chip.
AP3019 also provides a disable port to ease its use for different systems.
The over output voltage protection is ...