SGM3139B.pdf
No.10883
● 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 Package
The SGM3139B is a 6-channel ultra low dropout constant source parallel LED driver. The SGM3139B uses an internal resistor to set the bias current for six LEDs, which are matched to ±3%. The SGM3139B 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 SGM3139B requires only a 35mV dropout voltage at a 20mA load. The feature makes SGM3139B ideal for battery-operated systems, such as personal digital assistants.
The SGM3139B is available in Green TQFN-3×3-16L package and is specified over an ambient temperature range of -40℃ to +85℃.
