厂商：Freescale
类别：16位单片机
厂商：Littelfuse
类别：瞬态抑制二极管
类别：TVS二极管
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
类别：晶闸管
厂商：Realtek
类别：音频编解码器
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特点 Drives External Power MOSFET with External I SENSE Resistor Application Input Voltage Limited Only by External Power ComponentsSenses Output Voltage Directly from Primary Side Winding—No Optoisolator RequiredAccurate Regulation Without User TrimsRegulation Maintained Well into Discontinuous ModeSwitching Frequency from 50kHz to 250kHz with External CapacitorAvailable in 16-Pin SO and SSOP PackagesOptional Load CompensationOptional Undervoltage Lockout典型应用典型应用描述The LT1725 has a number of features not found on most other switching regulator ICs. By utilizing current mode switching techniques, it provides excellent AC and DC line regulation. Its unique control circuitry can maintain regulation well into discontinuous mode in most applications. Optional load compensation circuitry allows for improved load regulation. An optional undervoltage lockout pin halts operation when the application input voltage is too low. An optional external capacitor implements a soft-start function. A 3V output is available at up to several mA for powering primary side application circuitry.