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