Power Integrations DPA423R

Description
The DPA-Switch™ IC family is a highly integrated solution for DC-DC conversion applications with 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 (e.g. current limit, frequency, PWM gain) have tight temperature and absolute tolerance, to simplify design and reduce system cost.

Features
Highly Integrated Solution
Eliminates up to 50 external components-saves space, cost
Integrates 220 V high frequency MOSFET, PWM control
Lower cost plastic DIP surface mount (G package) and through-hole (P package) options for designs <35 W
Thermally efficient TO-263-7C (R package) option for high power applications
Superior Performance and Flexibility
Eliminates all external current sensing circuitry
Built-in auto-restart for output overload/open loop protection
Pin selectable 300/400 kHz fixed frequency
Wide input (line) voltage range: 16-75 VDC
Externally programmable current limit
Source connected tab reduces EMI
Line undervoltage (UV) detection: meets ETSI standards
Line overvoltage (OV) shutdown protection
UV/OV limits gate drive voltage for synchronous rectification
Fully integrated soft-start for minimum stress/overshoot
Supports forward or flyback topology
Cycle skipping: regulation to zero load without pre-load
Hysteretic thermal shutdown for automatic fault recovery
RoHS complant P and G package options
EcoSmart-Energy Efficient
Extremely low consumption at no-load
Cycle skipping at light load for high standby efficiency

Applications
PoE applications, VoIP phones, WLAN, security cameras
Telco central office equipment xDSL, ISDN, PABX
Distributed power architectures (24 V/48V bus)
Industrial controls