TOP264(2010) データシートの表示（PDF） - Power Integrations, Inc

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TOP264
(Rev.:2010)

Integrated Off-Line Switcher with EcoSmart® Technology for Highly Effcient Power Supplies

Power Integrations, Inc 

TOP264-271

Section List

Functional Block Diagram ........................................................................................................................................ 3

Pin Functional Description ....................................................................................................................................... 3

TOP264-271 Functional Description ......................................................................................................................... 4

CONTROL (C) Pin Operation..................................................................................................................................... 5

Oscillator and Switching Frequency.......................................................................................................................... 5

Pulse Width Modulator ............................................................................................................................................ 5

Maximum Duty Cycle................................................................................................................................................ 6

Error Amplifier........................................................................................................................................................... 6

On-Chip Current Limit with External Programmability................................................................................................ 6

Line Undervoltage Detection (UV).............................................................................................................................. 6

Line Overvoltage Shutdown (OV).............................................................................................................................. 7

Hysteretic or Latching Output Overvoltage Protection (OVP)..................................................................................... 7

Line Feed-Forward with DCMAX Reduction................................................................................................................. 8

Remote ON/OFF ...................................................................................................................................................... 8

Soft-Start.................................................................................................................................................................. 9

Shutdown/Auto-Restart (for OCP, SCP, OPP)......................................................................................................... 10

Hysteretic Over-Temperature Protection (OTP)........................................................................................................ 10

Bandgap Reference................................................................................................................................................ 10

High-Voltage Bias Current Source........................................................................................................................... 10

Typical Uses of FREQUENCY (F) Pin ....................................................................................................................... 12

Typical Uses of VOLTAGE MONITOR (V) and EXTERNAL CURRENT LIMIT (X) Pins .......................................... 13

Application Examples ............................................................................................................................................... 15

Low No-load, High Efficiency, 65 W, Universal Input Adapter Power Supply...................................................................... 15

Very low No-load, High Efficiency, 30 W, Universal Input, Open Frame, Power Supply............................................................... 17

Key Application Considerations .............................................................................................................................. 18

TOPSwitch-JX vs.TOPSwitch-HX........................................................................................................................ . 18

TOP264-271 Design Considerations ...................................................................................................................... 18

TOP264-271 Layout Considerations....................................................................................................................... 20

Quick Design Checklist........................................................................................................................................... 21

Design Tools........................................................................................................................................................... 21

Product Specifications and Test Conditions .......................................................................................................... 23

Typical Performance Characteristics ..................................................................................................................... 30

Package Outlines ..................................................................................................................................................... 34

Part Ordering Information ........................................................................................................................................ 35

2

Rev. B 03/10

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