描述 Description

The SMP402, intended for non-isolated ISDN telecommunications power supply applications, combines a high voltage power MOSFET switch with a switchmode power system controller in a monolithic integrated circuit. Few external components are required to implement a low cost power supply which meets stringent ISDN specifications. High frequency operation reduces total power supply size.

Product Highlights

Integrated Power Switch and CMOS Controller

? Output power > 1 W from 48 VDC input

? Adjustable output voltage

? Integrated solution minimizes overall size

High-voltage, Low-capacitance MOSFET Output

? Designed for ISDN T1 telecommunications applications

? Low capacitance allows for high frequency operation

High-voltage Buck Regulator

? Internal pre-regulator self-powers the IC on start-up

? Designed for low power consumption

? Minimum external parts required

Built-In Self-protection Circuits

? Undervoltage lockout

? Thermal shutdown

? Input polarity/level sense