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SGM3123

所属分类:
LED驱动器
目标应用:
无线手机
MP3, MP4 and PMP
手机
便携式通信设备
数码相机
摄像机
掌上电脑
手持终端
LED /显示背光驱动器
LED用于相机闪光灯
电池供电设备
  • 产品参数
  • 描述
  • 特性

The SGM3123 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 SGM3123 uses an internal resistor to set the bias current for four LEDs, which are matched to ±5%. The SGM3123'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 SGM3123 requires only a 40mV dropout voltage at a 20mA load on each output to match the LED brightness.
The SGM3123 is available in Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40°C to +85°C.
Support up to 4 LEDs
Low 40mV Dropout at 20mA
Less than ±5% LED Current Matching
Simple LED Brightness Control
Low Shutdown Current
2.5V to 5.0V Supply Voltage Range
Thermal Shutdown Protection
Operating Temperature Range: -40℃ to +85℃
Available in Green TQFN-3×3-16L Package