DPA423PN

Product Summary

The DPA423PN is a Highly Integrated DC-DC Converter IC for Power over Ethernet & Telecom DC-DC. The DPA423PN is a highly integrated solution for DC-DC conversion applications for 16-75 VDC input. DPA-Switch uses the same proven topology as TOPSwitch, cost effectively integrating a power MOSFET, PWM control, fault protection and other control circuitry onto a single CMOS chip. High performance features are enabled with three user configurable pins. Hysteretic thermal shutdown is also provided. In addition, all critical parameters of the DPA423PN have tight temperature and absolute tolerance, to simplify design and reduce system cost. The applications of the device include PoE applications, VoIP phones, WLAN, security cameras, Telco central office equipment: xDSL, ISDN, PABX, Distributed power architectures (24 V/48 V bus) and Industrial controls.

Parametrics

DPA423PN absolute maximum ratings: (1)DRAIN Voltage: -0.3 V to 220 V; (2)DRAIN Peak Current: 1.75 A; (3)CONTROL Voltage: -0.3 V to 9 V; (4)CONTROL Current: 100 mA; (5)LINE SENSE Pin Voltage: -0.3 V to 9 V; (6)EXTERNAL CURRENT LIMIT Pin Voltage: -0.3 V to 9 V; (7)FREQUENCY Pin Voltage: -0.3 V to 9 V; (8)Storage Temperature: -65 to 150℃; (9)Operating Junction Temperature: -40 to 150℃; (10)Lead Temperature: 260℃.

Features

DPA423PN features: (1)minates all external current sensing circuitry; (2)Built-in auto-restart for output overload/open loop protection; (3)Pin selectable 300/400 kHz fixed frequency; (4)Wide input (line) voltage range: 16-75 VDC; (5)Externally programmable current limit; (6)Source connected tab reduces EMI; (7)Line under-voltage (UV) detection: meets ETSI standards; (8)Line overvoltage (OV) shutdown protection; (9)UV/OV limits gate drive voltage for synchronous rectification; (10)Fully integrated soft-start for minimum stress/overshoot; (11)Supports forward or flyback topology; (12)Cycle skipping: regulation to zero load without pre-load; (13)Hysteretic thermal shutdown for automatic fault recovery; (14)RoHS compliant P, G and S package options.

Diagrams