供应SG3138YTQ16G/TR

输入电压范围(V)  2.7 to 5.5
 静态电流(μA)  210
 关断电流(μA)  ＜1
 输出电压纹波(mVp-p )  
 效率(%)  85
 开关频率(kHz)  1000
 SHDN高电平(V)  1.2
 SHDN低电平(V)  0.6
 Vout启动时间(ms)  0.235
 封装形式  TQFN3×3-16L
The SGM3138 is a high performance white LED driver. It integrates current sources and automatIC mode selection charge pump. The part maintains the high efficiency by utilizing a 1×/1.5× fractional charge pump and low dropout current sources. The small equivalent 1× mode open loop resistance and ultra-low dropout voltage of current source extend the operating time of 1× mode and optimize the efficiency of Li-ion battery in white LED applications.

 

The SGM3138 supports up to 6 white LEDs and regulates a constant current which the initial value can be set by an internal resistor. The part implements a 4-bit DAC for brightness control. Users can easily configure the LED current from 1.25mA to 20mA by a serial pulse. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN/SET pin. There are totally 16 steps of current could be set by users. The operating voltage range is 2.7V to 5.5V. Internal soft start circuitry effectively reduces the in-rush current while both start-up and mode transition.

 

The SGM3138 is available in Green TQFN3×3-16L package and is rated over the -40°C to +85°C temperature range.