Mobile phone battery charger Solution

PLD6N18V10 ----White LED Driver With Digital and PWM Brightness Control

Time:2013-3-1 16:35:57

With a 40-V rated integrated switch FET, the PLD6N18V10 is a boost converter that drives LEDs in series. The boost converter runs at 600kHz fixed switching frequency to reduce output ripple, improve conversion efficiency, and allows for the use of small external components.

The default white LED current is set with the external sensor resistor Rset, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled using the 1-wire digital interface
(Easyscale protocol) through the CTRL pin. Alternatively, a pulse width modulation (PWM) signal can be applied to the CTRL pin through which the duty cycle determines the feedback reference voltage. In either digital or PWM mode, the PLD6N18V10 does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the TPS61160/1 to prevent the output voltage from exceeding the IC's absolute maximum voltage ratings during open LED conditions.2.7V to 18V Input Voltage Range

  • 38V Open LED Protection
  • 200mV Reference Voltage With ±2% Accuracy
  • Flexible Digital and PWM Brightness Control
  • Built-in Soft Start
  • Up to 90% Efficiency
  • 2mm × 2mm × 0.8mm 6-pin QFN Package With Thermal Pad