厂商：Freescale
类别：16位单片机
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：SSD(可控硅输出光电耦合器)
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特点 Up to 80% Efficiency Inherently Matched LED Current Drives Five White LEDs from 2VDrives Six White LEDs from 2.7VDrives Eight White LEDs from 3V Adjustable Control of LED Current Disconnects LEDs In Shutdown1.2MHz Fixed Frequency SwitchingUses Tiny Ceramic CapacitorsUses Tiny 1mm-Tall Inductors Regulates Current Even When V IN > V OUT Operates with V IN as Low as 1V Low Profile (1mm) ThinSOT? Package典型应用典型应用描述With an input voltage range of 1V to 10V, the device works from a variety of input sources. The LT1932 accurately regulates LED current even when the input voltage is higher than the LED voltage, greatly simplifying battery-powered designs. A single external resistor sets LED current between 5mA and 40mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal. When the LT1932 is placed in shutdown, the LEDs are disconnected from the output, ensuring a quiescent current of under 1μA for the entire circuit. The device’s 1.2MHz switching frequency permits the use of tiny, low profile chip inductors and capacitors to minimize footprint and cost in space-conscious portable applications.