G5998 Global Mixed-mode Technology 8-CH Local Dimming LED Driver IC -- PWM waveform selection: front/middle/end alignment -- PWM phase-shift function (Software type) -- PWM scanning offset function External PWM mode -- Dimming frequency range: 100Hz ~ 25kHz -- Dimming resolution: 1% -- PWM phase-shift function (Hardware type) Provide for output channels Parallel Keep unused channel at ground Protection Function LED driver Input under voltage lockout (UVLO) LED Current Sink open circuit protection Thermal overload protection (OTP) LED Current Sink short circuit protection Current DAC control function 1 Features Input supply voltage (VIN): 3V~5.5V VIH : 1.6V VIL : 0.8V LED Driver 8 output channels Drive capability (Constant-Current Sink) from 5mA ~ 150mA Current accuracy ±3% and current balance ±2% maximum CSn voltage (18V) Low operation voltage (500mV ,@ 120mA) minimum on time 400nS (Tr < 80nS, Tf <80nS) minimum VFB feedback input and output(with a Gain value 3) Input Interface Serial digital interface HSC (High Speed Serial Control) External PWM input Analog Dimming input HSC/PWM mode selection Output PWM Control Two operation mode: HSC/PWM HSC mode -- Dimming frequency range: 40Hz ~ 1.92kHz -- Dimming resolution: 0.1% (CSn[9:0] = 10d’1) -- Dimming frequency function: 1x ~ 8x frame rate (frequency of YDIO) 2 General Description This specification describes a high constant-current driving, 8-channel, LED Driver with integrated high speed serial control (HSC) for LED backlight. Each channel has an individually adjustable 1024-step grayscale PWM brightness control (HSC mode) or direct controlled by external PWM signal or Analog Dimming signal (external PWM mode). Ordering Information TEST_MODE YDIO_OUT A3 25 VFB_OUT 26 GND 32 31 Pin Configuration SDA_OUT TQFN5X5-32 28 -40°C to +85°C 27 5998 G5998RA1U Note: RA: TQFN5X5-32 1: Bonding Code U: Tape & Reel FAULT PACKAGE (Green) SCL_OUT TEMP. RANGE 29 MARKING 30 CS1 1 24 A2 CS2 2 23 A1 CS3 3 22 A0 CS4 4 21 GND CS5 5 CS6 Thermal Pad 13 14 15 16 SDA EN ISET ADIM 12 PWMI 17 SCL 18 11 7 8 RSDT CS7 CS8 9 MODE 10 19 GND VIN 6 VFB_IN 20 PSEL/YDIO ORDER NUMBER G5998 TQFN5X5-32 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Jul 13, 2012 1