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The MC33363B is a monolithic high voltage switching regulator that is specifically designed to operate from a rectified 240 Vac line source. This integrated circuit features an on--chip 700 V/1.0 A SENSEFET? power switch, 500 V active off--line startup FET, duty cycle controlled oscillator, current limiting comparator with a programmable threshold and leading edge blanking, latching pulse width modulator for double pulse suppression, high gain error amplifier, and a trimmed internal bandgap reference. Protective features include cycle--by--cycle current limiting, input undervoltage lockout with hysteresis, overvoltage protection, and thermal shutdown. This device is available in a 16--lead dual--in--line and wide body surface mount packages.

Features

? On--Chip 700 V, 1.0 A SENSEFET Power Switch

? Rectified 240 Vac Line Source Operation

? On--Chip 500 V Active Off--Line Startup FET

? Latching PWM for Double Pulse Suppression

? Cycle--By--Cycle Current Limiting

? Input Undervoltage Lockout with Hysteresis

? Over--Voltage Protection

? Trimmed Internal Bandgap Reference

? Internal Thermal Shutdown

? These are Pb--Free Devices*