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Product attributes Property Value
Manufacturer Power Integrations
Product Series TinySwitch®-4
Packaging Cut Tape (CT) | Tape & Reel (TR)
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) 8.5 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 Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width), 7 Leads
Supplier Device Package SO-8C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The TNY285DG-TL from Power Integrations is a flyback offline switcher in the TinySwitch®-4 series, delivering up to 8.5 W with a 725V breakdown rating. It integrates the internal switch for a compact isolated design, runs at 124kHz to 140kHz with 67% maximum duty cycle, and includes current limiting, open loop, over temperature, over voltage, and short circuit protection. Supplied in a 7-lead 8-SOIC package rated for -40°C to 150°C junction temperatures.

  • Integrated internal switch reduces external component count and simplifies isolated flyback designs.
  • 725V breakdown voltage provides a wide Vds margin for offline operation.
  • Comprehensive fault protection (current limiting, open loop, over temperature, over voltage, short circuit) improves reliability.
  • EN control feature enables flexible on/off regulation.
  • Wide -40°C to 150°C junction temperature range suits demanding thermal environments.

Compact AC-DC Adapters

The 8.5 W power capability and 725V breakdown rating make this flyback switcher well suited to small isolated adapters and chargers where a robust Vds margin is needed.

Standby and Auxiliary Supplies

With an integrated switch and EN control feature, the TNY285DG-TL simplifies isolated bias supply designs, reducing external component count in auxiliary power rails.

Home Appliance Control Boards

The wide -40°C to 150°C junction temperature range supports reliable operation in appliance control electronics that see elevated internal temperatures.

Industrial Metering and Sensors

Galvanic isolation plus over voltage and short circuit protection help meet safety and reliability needs in isolated sensor and metering front ends.

IoT and Smart Device Power

Operating at 124kHz to 140kHz with a 67% duty cycle, this flyback device supports compact isolated power stages for connected devices.

Q: What is the switching topology of the TNY285DG-TL?
A: It is a flyback offline switcher with galvanically isolated output, using an integrated internal switch.
Q: What is the breakdown voltage rating?
A: The device has a 725V Vds breakdown rating.
Q: How much output power can it deliver?
A: It delivers up to 8.5 W.
Q: What switching frequency does it use?
A: It operates at 124kHz to 140kHz with a 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 : TNY285DG
124kHz ~ 140kHz 725V Breakdown 8-SOIC 8.5 W AC-DC Converter Flyback Converter Isolated Offline Switcher TinySwitch-4
Q: What is the switching topology of the TNY285DG-TL?
A: It is a flyback offline switcher with galvanically isolated output, using an integrated internal switch.
Q: What is the breakdown voltage rating?
A: The device has a 725V Vds breakdown rating.
Q: How much output power can it deliver?
A: It delivers up to 8.5 W.
Q: What switching frequency does it use?
A: It operates at 124kHz to 140kHz with a 67% maximum duty cycle.
Q: What protections are included?
A: Current limiting, open loop, over temperature, over voltage, and short circuit protection.