圣邦微电子

SGM3727 High Efficiency, 38V Step-Up WLED Driver

GENERAL DESCRIPTION

The SGM3727 is a step-up DC/DC converter designed for driving the white LEDs with an externally programmable constant current. This device features integrated, 38V power MOSFET that is capable of driving up to 10 white LEDs in series, providing inherent current matching for uniform brightness. WLED brightness adjustment is easily achieved via a single wire interface, totally 32 brightness levels of LED Dimming.

The SGM3727 features a variety of protection circuits, including integrated over-voltage protection (OVP), soft-start, cycle-by-cycle current limiting, and thermal shutdown protection circuitry.

The SGM3727 has 1A current limit. It is available in Green TDFN-2×2-8L package. It operates over an ambient temperature range of -40 to +85.


PIN CONFIGURATIONS


FEATURES

• High-Efficiency Boost DC/DC WLED Bias Supply
• Internal 38V, 0.5Ω Power MOSFET
• Up to 10 Serial White LEDs per String
• Switch Current Limit: 1A
• Single Wire Interface 32 Brightness Levels for LED
   Dimming
• Programmable OVP Voltage
• Soft-Start Function
• No Leakage from VIN to GND through LED String
• Thermal Shutdown
• Cycle-by-Cycle Over-Current Protection
• -40
to +85 Operating Temperature Range
• Available in Green TDFN-2×2-8L Package

APPLICATIONS

TFT LCD Displays
Smart Phones
Portable Media Players
GPS/Personal Navigation Devices


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM3727YDE8G/TR Production TDFN-2×2-8L 8 Y -40℃ to +85℃ Samples

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