GENERAL DEscriptION
The SGM37603A is a high efficiency 3-string white LED driver with a 1.2MHz boost converter. The supply voltage operates from 3V to 24V. The SGM37603A is capable of driving up to 8 LEDs in series for 40mA maximum LED current per string while achieving high conversion efficiency. An adaptively current-regulated method allows different LED string voltages while LED current remains in regulation. The LED current is programmed through an I2C interface or a PWM signal input. These features make it optimized for compact solutions and ideal for LCD display backlighting.
The SGM37603A 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.
FEATURES
12-Bit Resolution for Dimming Control
Up to 90% Boost Efficiency
Switching Frequency: 1.2MHz
Support 1 to 3 LED Strings in Parallel at Maximum 29.5V Output
11% LED Current Matching across Process, Voltage and Temperature at ILED = 12.21μA
1% LED Current Matching across Process, Voltage and Temperature at ILED = 25mA
11% LED Current Accuracy across Process, Voltage and Temperature at ILED = 12.21μA
3% LED Current Accuracy across Process, Voltage and Temperature at ILED = 25mA
PWM Dimming Interface
Programmable I2C Interface
Phase Shift Function
Hybrid PWM + Current Dimming for Higher LED Driver Optical Efficiency
Low EMI by Conducting Ringing Cancelling
Protection Features
Over-Voltage Protection
Over-Current Protection
Thermal Shutdown
APPLICATIONS
Power Source for Smart Phone and Tablet Backlighting