厂商：Freescale
类别：16位单片机
厂商：Yageo
类别：通孔电阻器
厂商：AKM
类别：数字音频编解码器
厂商：Realtek
类别：音频编解码器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：Renesas
类别：32位SuperH单片机
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封装管脚图产品描述The SGM3131 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 SGM3131 supports up to 4 white LEDs and regulates a constant current which the initial value can be set by an external resistor. The part implements a 4-bit DAC for brightness control. Users can easily configure the LED current from 0.5mA to 30mA by a serial pulse. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN 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 load is disconnected from VIN while shutdown and the shutdown current is less than 1μA.SGM3131 is available in Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40°C to +85°C.产品特性Input Voltage Range : 2.7V to 5.5VDrives up to 4 LEDs at 30mA EachLED Brightness Control Through Single Wire Interface16-Step Brightness ControlHigh Efficiency by Fractional Conversion with 1× and 1.5× ModesSwitching Frequency: 1MHzRegulated Output Current with 1% MatchingInternal Softstart Limits Inrush CurrentLow Input Ripple and Low EMIOver Current and Over Temperature ProtectedUnder Voltage Lockout with HysteresisOperating Temperature Range: -40°C to +85°CAvailable in Green TQFN-3×3-16L Package