4通道 20mA LDO LED背光驱动IC PT4412

PT4412
4通道 20mA LDO LED背光驱动IC
White/Blue LED Driver   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

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