MAX17061A

19-4485; Rev 0; 2/09 www.DataSheet4U.com KIT ATION EVALU E L B AVAILA 8-String White LED Driver with SMBus for LCD Panel Applications General Description Features o Accurate Dimming Control Using SMBus, PWM Interface o Dimming Range with 8-Bit Resolution o Adjustable DPWM Frequency with 1.5% Accuracy o Up to Eight Parallel Strings Multiple SeriesConnected LEDs o ±1.5% Current Regulation Accuracy Between Strings o Low String Feedback Voltage: 625mV at 25mA LED Current o Full-Scale LED Current Adjustable from 15mA to 30mA, or Preset 25mA o Open and Short LED Protections o Output Overvoltage Protection o 0.15Ω Internal HV Power MOSFET (45V max) o Wide Input-Voltage Range from 4.5V to 26V o 500kHz/750kHz/1MHz Selectable Switching Frequency o Small 28-Pin, 4mm x 4mm, Thin QFN package MAX17061A The MAX17061A is a high-efficiency driver for white lightemitting diodes (LEDs). It is designed for large liquidcrystal displays (LCDs) that employ an array of LEDs as the light source. An internal switch current-mode step-up controller drives the LED array, which can be configured for up to eight strings in parallel and 10 LEDs per string. Each string is terminated with ballast that achieves ±1.5% current-regulation accuracy between strings, ensuring even LED brightness. The MAX17061A has a wide inputvoltage range from 7.5V to 26V, and provides a fixed 25mA or adjustable 15mA to 30mA full-scale LED current. The MAX17061A internally generates a DPWM signal for accurate WLED dimming contr...