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Product attributes Property Value
Manufacturer Power Integrations
Product Series TOPSwitch®-HX
Packaging Tube |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 700V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 78%
Frequency - Switching 66kHz, 132kHz
Power (Watts) 21 W
Fault Protection Current Limiting, Over Temperature, Over Voltage
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Through Hole
Package / Case 7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Supplier Device Package eSIP-7C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Power Integrations TOP252EN from the TOPSwitch®-HX series is an isolated Flyback offline switcher with an integrated 700V breakdown power switch. It delivers up to 21 W with selectable 66kHz or 132kHz switching frequency and 78% maximum duty cycle. Current limiting, over temperature, and over voltage protection ensure safe operation across a -40°C to 150°C junction temperature range in a 7-SSIP package.

  • 700V integrated switch for robust offline isolation.
  • Selectable 66kHz or 132kHz switching frequency for design flexibility.
  • 78% maximum duty cycle for efficient energy transfer.
  • Current limiting, over temperature, and over voltage protection.
  • Wide -40°C to 150°C junction temperature range.

Isolated Flyback Power Supplies

With a 700V integrated switch and isolated Flyback topology, the TOP252EN suits low-to-mid power AC-DC supplies up to 21 W. Selectable 66kHz or 132kHz switching and 78% max duty cycle give designers flexibility in transformer and EMI trade-offs.

Consumer Electronics Adapters

The integrated power switch simplifies isolated adapter designs, reducing external component count while maintaining galvanic isolation between mains and output.

Industrial and Appliance Bias Rails

The -40°C to 150°C junction temperature range supports reliable operation in demanding environments. Current limiting, over temperature, and over voltage protection enhance system safety.

Auxiliary and Standby Supplies

This TOPSwitch®-HX device provides a regulated isolated auxiliary rail for systems requiring a mains-derived bias supply.

Q: What topology does the TOP252EN use?
A: It is an isolated Flyback offline switcher.
Q: What is the breakdown voltage?
A: The integrated switch is rated at 700V breakdown.
Q: How much power does it deliver?
A: Up to 21 W of output power.
Q: What switching frequency does it use?
A: It offers 66kHz and 132kHz options.
Q: What protections are included?
A: Current limiting, over temperature, and over voltage protection.
Base Product Number : TOP252EN
21W 7-SSIP 700V AC-DC Converter Flyback Converter Isolated Offline Switcher Power Integrations TOPSwitch-HX
Q: What topology does the TOP252EN use?
A: It is an isolated Flyback offline switcher.
Q: What is the breakdown voltage?
A: The integrated switch is rated at 700V breakdown.
Q: How much power does it deliver?
A: Up to 21 W of output power.
Q: What switching frequency does it use?
A: It offers 66kHz and 132kHz options.
Q: What protections are included?
A: Current limiting, over temperature, and over voltage protection.