DESCRIPTION

The NE/SE5560 is a control circuit for use in switched-mode power supplies. This single monolithic chip incorporates all the control and housekeeping (protection) functions required in switched-mode power supplies, including an internal temperature-compensated reference source, internal Zener references, sawtooth generator, pulse-width modulator, output stage and various protection circuits.

FEATURES

• Stabilized power supply

• Temperature-compensated reference source

• Sawtooth generator

• Pulse-width modulator

• Remote on/off switching

• Current limiting

• Low supply voltage protection

• Loop fault protection

• Demagnetization/overvoltage protection

• Maximum duty cycle clamp

• Feed-forward control

• External synchronization