厂商：Freescale
类别：16位单片机
厂商：Linear
类别：功率放大器
厂商：Harting
类别：D类微型连接器
厂商：CooperBussmann
类别：阵列/信号变压器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
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封装管脚图产品描述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.产品特性Support up to 4 LEDsLow 40mV Dropout at 20mALess than ± 5% LED Current MatchingSimple LED Brightness ControlLow Shutdown Current2.5V to 5.0V Supply Voltage RangeThermal Shutdown ProtectionOperating Temperature Range: -40 ℃ to +85 ℃Available in Green TQFN-3 × 3-16L Package