圣邦微电子

SGM3127 White LED Driver with Low Dropout Current Source

GENERAL DESCRIPTION

The SGM3127 low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. It is optimized for low power keypad and portable backlighting applications.

The SGM3127 uses an internal resistor to set the bias current for four LEDs, which are matched to ±5%. The SGM3127's advantages over ballast resistors include much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency.

The SGM3127 requires only a 50mV dropout voltage at a 30mA load on each output to match the LED brightness.

The SGM3127 is available in Green SOT-23-6 package. It operates over an ambient temperature range of -40 to +85.


PIN CONFIGURATIONS


FEATURES

• Support up to 4 LEDs
• Low 50mV Dropout at 30mA
• Less than ±5% LED Current Matching
• Simple LED Brightness Control
• Low Shutdown Current
• 2.5V to 5.5V Supply Voltage Range
• Thermal Shutdown Protection
• Operating Temperature Range: -40
 to +85
• Available in Green SOT-23-6 Package

APPLICATIONS

Wireless Handsets
MP3, MP4, and PMP
Cellular Phones
Portable Communication Devices
Digital Cameras, Camcorders
PDAs, Palmtops, and Handy Terminals
LED/Display Back Light Driver
LEDs for Camera Flash
Battery-Powered Equipment


ORDERING INFORMATION

Part Number Status Package Pins Pb-Free Temp Range
SGM3127YN6G/TR Production SOT-23-6 6 Y -40℃ to +85℃ Samples

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