SGM3139

SGM3139 6-Channel 1-Wire Dimming LED Driver with Ultra Low Dropout Current Source GENERAL DESCRIPTION FEATURES The SGM3139 is a 6-channel ultra low dropout constant source parallel LED driver. The SGM3139 uses an internal resistor to set the bias current for six LEDs, which are matched to ±3%. The SGM3139 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 SGM3139 requires only a 35mV dropout voltage at a 20mA load. The feature makes SGM3139 ideal for battery-operated systems, such as personal digital assistants. ● Ultra Low Dropout: 35mV/20mA ● Support up to 6 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 and TDFN-3×3-10L Packages TYPICAL APPLICATION The SGM3139 is available in Green TQFN-3×3-16L and TDFN-3×3-10L packages and is specified over an ambient temperature range of -40℃ to +85℃. APPLICATIONS Wireless Handsets MP3, MP4, and PMP Cellular Phones Portable Communication Devices Digital Cameras, Camcorders PDAs, Palmtops, and Handy Terminals Battery-Powered Equipment 2.5V to 5.0V VIN 1µF Pulse Inpput 12 n=16 SGM3139 PGND EN/SET AGND LED1 LED2 LED3 LED4 LED5 LED6 SG Micro Corp www.sg-micro.com REV. A. 3 SGM3139 6-Channel 1-Wire Dimming LED Driver wi...