DPA425R Power Integrations, DPA425R Datasheet - Page 2

IC CONV DC-DC DPA SWITCH TO263-7

DPA425R

Manufacturer Part Number
DPA425R
Description
IC CONV DC-DC DPA SWITCH TO263-7
Manufacturer
Power Integrations
Series
DPA-Switch®r
Datasheets

Specifications of DPA425R

Applications
Converter, Power Over Ethernet and Telecom Applications
Voltage - Input
16 ~ 75 V
Number Of Outputs
1
Voltage - Output
220V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (6 leads + tab, variant)
Mounting Style
SMD/SMT
For Use With
DAK-21A - KIT DESIGN ACCELERATOR DPA SW
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Rev. S 12/07
Functional Block Diagram ....................................................................................................................................... 3
Pin Functional Description ...................................................................................................................................... 3
DPA-Switch Family Functional Description ............................................................................................................ 4
Using Feature Pins ..................................................................................................................................................... 8
Typical Uses of FREQUENCY (F) Pin ...................................................................................................................... 11
Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins ....................................................... 11
Application Examples .............................................................................................................................................. 14
Key Application Considerations .............................................................................................................................. 16
Product Specifi cations and Test Conditions .......................................................................................................... 21
Typical Performance Characteristics .................................................................................................................. 27
Part Ordering Information ....................................................................................................................................... 30
Package Outlines .................................................................................................................................................... 31
2
CONTROL (C) Pin Operation .................................................................................................................................... 4
Oscillator and Switching Frequency .......................................................................................................................... 5
Pulse Width Modulator & Maximum Duty Cycle ........................................................................................................ 5
Minimum Duty Cycle and Cycle Skipping ................................................................................................................. 6
Error Amplifi er .......................................................................................................................................................... 6
On-chip Current Limit with External Programmability ................................................................................................ 6
Line Under-Voltage Detection (UV) ............................................................................................................................ 6
Line Overvoltage Shutdown (OV) .............................................................................................................................. 6
Line Feed-Forward with DC
Remote ON/OFF ...................................................................................................................................................... 7
Synchronization ........................................................................................................................................................ 7
Soft-Start ................................................................................................................................................................. 8
Shutdown/Auto-Restart ........................................................................................................................................... 8
Hysteretic Over-Temperature Protection ................................................................................................................... 8
Bandgap Reference ................................................................................................................................................. 8
High-Voltage Bias Current Source ............................................................................................................................ 8
FREQUENCY (F) Pin Operation ................................................................................................................................ 8
LINE-SENSE (L) Pin Operation ................................................................................................................................. 9
EXTERNAL CURRENT LIMIT (X) Pin Operation ......................................................................................................... 9
DPA-Switch Design Considerations ........................................................................................................................ 16
DPA-Switch Layout Considerations ........................................................................................................................ 18
Quick Design Checklist .......................................................................................................................................... 19
Design Tools .......................................................................................................................................................... 20
DPA422-426
MAX
Reduction ................................................................................................................ 6
Section List
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