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Product attributes Property Value
Manufacturer Power Integrations
Product Series TinySwitch®-4
Packaging Tube |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 725V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 67%
Frequency - Switching 124kHz ~ 140kHz
Power (Watts) 18 W
Fault Protection Current Limiting, Open Loop, Over Temperature, Over Voltage, Short Circuit
Control Features EN
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 TNY289PG from Power Integrations is an isolated flyback offline switcher in the TinySwitch®-4 family. It integrates the power switch, delivers up to 18 W, and operates at 124kHz to 140kHz with a 725V breakdown rating and 67% maximum duty cycle. Current limiting, open loop, over temperature, over voltage, and short circuit protection support dependable isolated power designs.

  • Integrated switch simplifies isolated flyback designs and reduces BOM.
  • 725V breakdown voltage enables robust offline operation.
  • Broad 124kHz–140kHz switching frequency range with 67% max duty cycle.
  • Comprehensive protection: current limiting, open loop, OTP, OVP, and short circuit.
  • Wide -40°C to 150°C junction temperature range for demanding applications.

Low-Power AC-DC Adapters

The 18 W rating and 124kHz–140kHz switching frequency suit compact isolated flyback adapters for consumer electronics.

Standby and Auxiliary Power

With an EN control feature and comprehensive fault protection, the TNY289PG supports reliable auxiliary and standby supplies.

Home Appliances

An operating junction temperature range of -40°C to 150°C allows use in appliance control and bias supplies.

Industrial Controls

Short circuit, open loop, and over temperature protection make this flyback switcher suitable for rugged isolated control power.

Q: What topology does the TNY289PG use?
A: It is an isolated flyback offline switcher from the TinySwitch®-4 series.
Q: What is the breakdown voltage?
A: The device has a 725V breakdown voltage rating.
Q: Does it have an integrated switch?
A: Yes, the power switch is integrated on-chip.
Q: What power and frequency does it support?
A: It delivers up to 18 W with switching frequency from 124kHz to 140kHz and 67% maximum duty cycle.
Q: What protections are included?
A: Current limiting, open loop, over temperature, over voltage, and short circuit protection.
Base Product Number : TNY289PG
124kHz-140kHz 18 W 725V 8-DIP EN Control Flyback Converter Isolated TinySwitch-4
Q: What topology does the TNY289PG use?
A: It is an isolated flyback offline switcher from the TinySwitch®-4 series.
Q: What is the breakdown voltage?
A: The device has a 725V breakdown voltage rating.
Q: Does it have an integrated switch?
A: Yes, the power switch is integrated on-chip.
Q: What power and frequency does it support?
A: It delivers up to 18 W with switching frequency from 124kHz to 140kHz and 67% maximum duty cycle.
Q: What protections are included?
A: Current limiting, open loop, over temperature, over voltage, and short circuit protection.