MC33370T

The MC33370T is belongiong to new MC33370 series which are monolithic high voltage power switching regulators. The regulators integrate the required converter functions and a unique programmable state controller, accepting a simple and economical power system solution for office automation, consumer, and industrial products. The device can offer an output power in excess of 150 W with a fixed AC input of 100 V, 115 V, or 240 V, and in excess of 90 W with a variable AC input that ranges from 85 V to 265 V.

Features of the MC33370T are:(1)programmable state controller to implement 4 methods of On/Off control of the con verter;(2)on-chip 700 V SENSEFET power switch circuit;(3)rectified AC line source operation from 85 V to 265 V;(4)on-chip 700 V active off-line start-up circuit;(5)latching PWM for double pulse suppression;(6)cycle-by-Cycle current limiti ng;(7)input undervoltage lockout with hysteresis;(8)internal thermal shutdown.

The specification of the MC33370T can be summarized as:(1):max power switch voltage is 700V;(2):peak switch curr ent is 0.9A to 3.3A;(3):typical duty cycle ranges from 0.9% to 74%;(4):on resistance for series is 3 to 12; (5): control scheme is fixed frequency PWM, voltage mode;(6):frequency is 100 kHz;(7):frequency tolerance(@ TJ=25°C)is ±10% ;(8):packaging is TO-220 5-Pin and DIP 8*;(9):tab connection is TO-220 heat sink connected to GND pin. etc.