SGM3132

SGM3132 4-Channel 1-Wire Dimming LED Driver with Ultra-Low Dropout Current Source GENERAL DESCRIPTION The SGM3132 is a 4-channel ultra-low dropout constant source parallel LED driver. The SGM3132 uses an internal resistor to set the bias current for four LEDs. The SGM3132 incorporates a single wire interface to program the output current at 16 continuous steps. It has an internal deglitch circuit for filtering the noise of the EN input. The SGM3132 requires only a 35mV dropout voltage at a 20mA load. The feature makes SGM3132 ideal for battery-operated systems, such as personal digital assistants. The SGM3132 is available in Green TQFN-3×3-16L, TDFN-2×2-8L and MSOP-8 packages and is specified over an ambient temperature range of -40℃ to +85℃. FEATURES ● Ultra-Low Dropout: 35mV/20mA ● Support up to 4 LEDs ● LED Sink Current 20mA ● ±3% LED Current Matching ● Deglitch Circuit ● Thermal Shutdown Protection ● 16-Step Brightness Control ● No EMI and Switch Noise ● Operating Temperature Range: -40℃ to +85℃ ● Available in Green TQFN-3×3-16L, TDFN-2×2-8L and MSOP-8 Packages APPLICATIONS Wireless Handsets MP3, MP4, and PMP Cellular Phones Portable Communication Devices Digital Cameras, Camcorders PDAs, Palmtops, and Handy Terminals Battery-Powered Equipment TYPICAL APPLICATION 2.5V to 5.0V 1μF VIN PGND Pulse Inpput 12 n≤16 SGM3132 LED1 EN LED2 LED3 AGND LED4 SG Micro Corp www.sg-micro.com JANUARY 2013 – REV. A. 2 SGM3132 4-Channel 1-Wire Dimming LED Driver with Ultra-...