The SGM37604A is an ultra-compact, highly efficient, 4-string white-LED driver designed for LCD display backlighting. The device operates over the 3V to 24V input voltage, it can power up to 8 series LEDs at up to 40mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input. The SGM37604A is available in Green WLCSP-1.78×1.36-12B and TDFN-3×3-12L packages. It operates over the -40℃ to +85℃ temperature range.
11% Matched Current Sinks across Process, Voltage and Temperature at ILED = 12.21μA
1% Matched Current Sinks across Process, Voltage and Temperature at ILED = 25mA
11% Current Sink Accuracy across Process, Voltage and Temperature at ILED = 12.21μA
3% Current Sink Accuracy across Process, Voltage and Temperature at ILED = 25mA
12-Bit Dimming Resolution
Up to 90% Solution Efficiency
Drive from 1 to 4 Parallel LED Strings at Up to 29.5V
PWM Dimming Input
I2C Programmable
Phase Shift Function
Hybrid PWM + Current Dimming for Higher LED Driver Optical Efficiency
1.2MHz Switching Frequency
Low EMI by Conducting Ringing Cancelling
Over-Voltage Protection
Over-Current Protection
Thermal Shutdown Protection
Power Source for Smart Phone and Tablet Backlighting
