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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) 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 Surface Mount
Package / Case 12-BESOP (0.350", 8.89mm Width), 11 Leads, Exposed Pad
Supplier Device Package 12-ESOP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Power Integrations TNY287KG-TL is a flyback offline switcher from the TinySwitch®-4 series with an integrated power switch for isolated AC-DC conversion. It delivers up to 18W with a 725V breakdown voltage, a 124kHz to 140kHz switching frequency, and a 67% maximum duty cycle. Integrated protections include current limiting, open loop, over temperature, over voltage, and short circuit. The device features an EN control input and is housed in a 12-BESOP package with exposed pad, rated for junction temperatures from -40°C to 150°C.

  • Integrated 725V switch reduces external components in isolated flyback designs.
  • 18W output at 124kHz to 140kHz switching frequency supports compact adapter form factors.
  • Comprehensive protection set including open loop, short circuit, over voltage, and over temperature.
  • EN control feature enables simple on/off regulation.
  • Exposed-pad 12-BESOP package improves thermal performance across -40°C to 150°C.

Compact AC-DC Chargers

The TNY287KG-TL combines a 725V integrated switch with a flyback controller, making it suitable for isolated chargers and adapters up to 18W. The 124kHz to 140kHz switching frequency helps reduce transformer size in space-constrained designs.

Standby Power Supplies

With short circuit, open loop, and over voltage protection integrated, this device supports reliable standby and housekeeping rails in appliances and consumer electronics. The EN control feature enables on/off regulation for simple feedback schemes.

Consumer Electronics Adapters

The 67% maximum duty cycle and 18W rating fit USB adapters, set-top boxes, and small networking equipment. The 12-BESOP package with exposed pad aids thermal dissipation in sealed enclosures.

Industrial Auxiliary Rails

Rated for -40°C to 150°C junction temperatures, the TNY287KG-TL suits isolated bias supplies in industrial and metering applications requiring wide thermal tolerance.

Q: What topology does the TNY287KG-TL use?
A: It is a flyback offline switcher with galvanically isolated output and an integrated power switch.
Q: What is the breakdown voltage?
A: The device has a 725V breakdown voltage rating for offline operation.
Q: What switching frequency does it use?
A: It operates at 124kHz to 140kHz with a 67% maximum duty cycle.
Q: How much power can it deliver?
A: It supports up to 18W of output power.
Q: What protections are integrated?
A: Current limiting, open loop, over temperature, over voltage, and short circuit protection are included.
Base Product Number : TNY287KG
12-BESOP 124kHz 18W 725V AC-DC Flyback Converter Isolated Offline Switcher Power Integrations TinySwitch-4
Q: What topology does the TNY287KG-TL use?
A: It is a flyback offline switcher with galvanically isolated output and an integrated power switch.
Q: What is the breakdown voltage?
A: The device has a 725V breakdown voltage rating for offline operation.
Q: What switching frequency does it use?
A: It operates at 124kHz to 140kHz with a 67% maximum duty cycle.
Q: How much power can it deliver?
A: It supports up to 18W of output power.
Q: What protections are integrated?
A: Current limiting, open loop, over temperature, over voltage, and short circuit protection are included.