GENERAL DEscriptION
The SGM3727 is a high efficiency current-regulated white LED driver with a boost DC/DC converter. With an internal 38V/1A power MOSFET, the SGM3727 supports up to 10 white LEDs in series and achieves uniform brightness. 32-step LED current can be set by a serial pulse signal into the EN/SET pin.
The SGM3727 includes a comprehensive set of protection features such as over-voltage protection, cycle-by-cycle current limit and thermal shutdown. Built-in soft-start circuitry avoids excessive inrush current during startup.
The SGM3727 is available in a Green TDFN-2×2-8L package. It operates over an ambient temperature range of -40℃ to +85℃.
FEATURES
Integrated 38V/1A Switch with 0.5Ω On-Resistance
High Efficiency Boost Bias Supply
Support up to 10 LEDs in Series per String
32-Step LED Brightness Control through One-Wire Interface
Automatic Soft-Start for Reducing Inrush Current
No Leakage from VIN to GND through LED String
Protection Features
Programmable Over-Voltage Protection
Cycle-by-Cycle Current Limit
Thermal Shutdown
-40℃ to +85℃ Operating Temperature Range
Available in a Green TDFN-2×2-8L Package
APPLICATIONS
Smart Phones and Portable Media Players
TFT LCD Displays
GPS/PND