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KTZ8850

1-Channel LED Driver plus 2-Channel LCD Panel Bias

Features Request Datasheet

        • Wide input range: 3.0V~5.5V

        • High efficiency step-up LED driver with dual output regulator for LCD bias power

        • Drive up to 10 series LEDs or 2 parallel strings of 8 series LEDs

        • Backlight efficiency: up to 86%

        • Highly integrated 40V Power MOSFET

        • Flexible dimming control

          • 256-step I2C Controlled or
          • High resolution PWM from 5kHz to 100kHz
        • High accuracy across full load range

        • Programmable LED open-circuit (OVP)/Short protection

        • Low 200mV feedback voltage

        • 1MHz High switching frequency

        • Internal over voltage protection (default 36V)

        • Programmable dual Bias output regulator based on single inductor solution

        • Charge pump PFM mode at light load

        • LCD Bias efficiency up to 90%

        • Wide dual output voltage range: +/-4.0V to +/-6.3V (100mV/step)

        • Typ. 2% output voltage accuracy

        • Maximum peak output current up to 80mA

        • Active output discharge function

        • Low quiescent current

        • Cycle-by-cycle inductor current limit

        • 1 µA shutdown current

        • Pb-free Packages: WLCSP-18

        • -40°C to +85°C Temperature Range

Applications

  • Smartphone

  • Tablet Backlight

  • Netbook/Notebook Backlight

  • PDA/GPS Backlight; Portable Media Player

Key Electrical Specifications

Vin(Min) Vin(Max) Number of LEDs/Channel Channels Control Type Package
3V 5.5V 10, 8 1/2 I2C WLCSP-18 2.47 x 1.27

Typical Application Diagram

KTZ8850

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