DPA425PN

Product Summary

The DPA425PN is a Highly Integrated DC-DC Converter. The DPA425PN uses the same proven topology as TOPSwitch, costeffectively integrating the high voltage power MOSFET, PWMcontrol, fault protection and other control circuitry onto a singleCMOS chip. High performance features of the DPA425PN are enabled with threeuser configurable pins. The following transparent or built-in features are also provided:soft-start, cycle skipping down to zero load and hystereticthermal shutdown. In addition, all critical parameters (i.e.current limit, frequency, PWM gain) have tight temperatureand absolute tolerance, to simplify design and optimize systemcost.

Parametrics

DPA425PN absolute maximum ratings: (1)DRAIN Voltage : -0.3 to 220 V; (2)DRAIN Peak Current: 7 A; (3)CONTROL Voltage : -0.3 to 9 V; (4)CONTROL Current : 100 mA; (5)LINE SENSE Pin Voltage : -0.3 to 9 V; (6)EXTERNAL CURRENT LIMIT Pin Voltage : -0.3 to 9 V; (7)FREQUENCY Pin Voltage : -0.3 to 9 V; (8)Storage Temperature : -65 to 150℃; (9)Operating Junction Temperature: -40 to 150℃; (10)Lead Temperature: 260℃.

Features

DPA425PN features: (1)Eliminates 20-50 external components–saves space, cost; (2)Integrates 220 V high frequency MOSFET, PWM control; (3)Lower cost plastic DIP surface mount (G package)andthrough-hole (P package)options for designs≤35 W; (4)Eliminates all external current sensing circuitry; (5)Built-in auto-restart for output overload/open loop protection; (6)Pin selectable 300/400 kHz fixed frequency; (7)•Wide input (line)voltage range: 16-75 VDC; (8)Source connected tab reduces EMI; (9)Line under-voltage (UV)detection: meets ETSI standards; (10)Line overvoltage (OV)shutdown protection; (11)Low cost synchronous rectification: line UV/OV shut downlimits gate drive voltage range from transformer winding; (12)Fully integrated soft-start for minimum stress/overshoot; (13)Externally programmable current limit; (14)Supports forward or flyback topology; (15)Cycle skipping: regulation to zero load without pre-load; (16)Hysteretic thermal shutdown for automatic fault recovery.

Diagrams