TOP252 Ver la hoja de datos (PDF) - Power Integrations, Inc

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TOP252

AC/DC Converters Off-Line Switcher IC 26W/64W PK

Power Integrations, Inc 

TOP252-262

Section List

Functional Block Diagram ........................................................................................................................................ 4

Pin Functional Description ....................................................................................................................................... 6

TOPSwitch-HX Family Functional Description ........................................................................................................ 7

CONTROL (C) Pin Operation..................................................................................................................................... 8

Oscillator and Switching Frequency........................................................................................................................... 8

Pulse Width Modulator ............................................................................................................................................. 9

Maximum Load Cycle............................................................................................................................................... 9

Error Amplifier........................................................................................................................................................... 9

On-Chip Current Limit with External Programmability................................................................................................ 9

Line Undervoltage Detection (UV)............................................................................................................................ 10

Line Overvoltage Shutdown (OV)............................................................................................................................. 11

Hysteretic or Latching Output Overvoltage Protection (OVP)................................................................................... 11

Line Feed-Forward with DCMAX Reduction............................................................................................................... 13

Remote ON/OFF and Synchronization..................................................................................................................... 13

Soft-Start................................................................................................................................................................ 13

Shutdown/Auto-Restart.......................................................................................................................................... 13

Hysteretic Over-Temperature Protection.................................................................................................................. 13

Bandgap Reference................................................................................................................................................ 13

High-Voltage Bias Current Source........................................................................................................................... 13

Typical Uses of FREQUENCY (F) Pin ....................................................................................................................... 15

Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins ........................................... 16

Typical Uses of MULTI-FUNCTION (M) Pin ............................................................................................................ 18

Application Examples ............................................................................................................................................... 21

A High Efficiency, 35 W, Dual Output – Universal Input Power Supply...................................................................... 21

A High Efficiency, 150 W, 250-380 VDC Input Power Supply................................................................................... 22

A High Efficiency, 20 W Continuous – 80 W Peak, Universal Input Power Supply.................................................... 23

A High Efficiency, 65 W, Universal Input Power Supply............................................................................................ 24

Key Application Considerations ............................................................................................................................... 25

TOPSwitch-HX vs.TOPSwitch-GX........................................................................................................................ . 25

TOPSwitch-HX Design Considerations ................................................................................................................... 26

TOPSwitch-HX Layout Considerations.................................................................................................................... 27

Quick Design Checklist........................................................................................................................................... 31

Design Tools........................................................................................................................................................... 31

Product Specifications and Test Conditions .......................................................................................................... 32

Typical Performance Characteristics ..................................................................................................................... 39

Package Outlines ..................................................................................................................................................... 43

Part Ordering Information ........................................................................................................................................ 47

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Rev. H 06/13

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