Skip to product information
1 of 1
Image shown is a representation only. Exact specifications should be obtained from the product data sheet.
Regular price $1.33
Regular price $1.40 Sale price $1.33
Sale Sold out
Quantity Unit Price Total Price
1 $1.33 $1.33
15+ $1.29 $19.35
25+ $1.26 $31.50
50+ $1.19 $59.50
100+ $1.05 $105.00
N+ $0.21 Price Inquiry
Shipping calculated at checkout.
Quantity
Component Recycling

Request Quote / Inquiry

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
Power (Watts) 41 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 8-DIP (0.300", 7.62mm), 7 Leads
Supplier Device Package 8-PDIP-C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The TOP257PG from Power Integrations is a flyback offline switcher with an integrated 700V power switch, delivering up to 41 W at 66 kHz with 78% maximum duty cycle. It provides galvanically isolated output with current limiting, over temperature, and over voltage protection across a -40°C to 150°C junction range in an 8-DIP package.

  • Integrated 700V switch reduces external component count and board space.
  • Flyback topology delivers galvanically isolated output for offline supplies.
  • 41 W output at 66 kHz suits compact adapter designs.
  • Current limiting, over temperature, and over voltage protection improve reliability.
  • -40°C to 150°C junction range supports thermally demanding applications.

Compact Isolated Adapters

The 41 W rating and integrated 700V switch enable compact flyback adapters with fewer external components.

Offline Power Supplies

Flyback topology provides galvanically isolated output for general offline AC-DC conversion.

Thermally Demanding Enclosures

-40°C to 150°C junction range supports reliable operation in high-temperature environments.

Fault-Protected Designs

Current limiting, over temperature, and over voltage protection cover common fault conditions.

Q: What topology does the TOP257PG use?
A: It is a flyback offline switcher providing galvanically isolated output.
Q: Does it have an integrated switch?
A: Yes, it integrates the power switch with a 700V breakdown rating.
Q: What output power does it support?
A: 41 W.
Q: What switching frequency and max duty cycle?
A: 66 kHz switching frequency with 78% maximum duty cycle.
Q: What protections are included?
A: Current limiting, over temperature, and over voltage protection.
Base Product Number : TOP257PG
41 W 66kHz 700V 8-DIP AC-DC Converter Flyback Converter Isolated Offline Switcher TOPSwitch-HX
Q: What topology does the TOP257PG use?
A: It is a flyback offline switcher providing galvanically isolated output.
Q: Does it have an integrated switch?
A: Yes, it integrates the power switch with a 700V breakdown rating.
Q: What output power does it support?
A: 41 W.
Q: What switching frequency and max duty cycle?
A: 66 kHz switching frequency with 78% maximum duty cycle.
Q: What protections are included?
A: Current limiting, over temperature, and over voltage protection.