深圳市广辉电子有限公司

 

  for Li-Io Battery Applications

 

GENERAL DESCRIPTION

 

The PT4412 is a series of White/Blue LED drivers. There is no external component needed, which helps to lower the system cost significantly. The circuit is optimized to provide over 90% efficiency. The PT4412 is ideal to drive white LEDs used for Li-ion battery powered LCD displays. The LED brightness can be adjusted in real time through a PWM signal at the EN pin. The target end applications are small color LCD displays in mobile phones, smart phone, digital cameras, PDA etc. PT4412 is available in SOT23-6 package.

 

FEATURES

 

¨          No external component required

¨          Fixed 20mA and 15mA sinking current

¨          Individual current sink circuit for each output to prevent short/open circuit on LEDs

¨          PTC LED current for luminosity compensation

¨          4 channels available

¨          PWM tuned LED brightness through EN pin

¨          Supply voltage range 2.7V~6.0V

¨          0.1uA standby current

 

APPLICATIONS

 

¨          Small Size Color LCD Backlights

¨          Mobile Phone, Smart Phone, PDA etc. Backlights

 

TYPICAL APPLICATIONS