The TYN268PN
Integrated 700V power MOSFET with auto-restart and EMI reduction
- Spec name: Integrated 700 V power MOSFET, oscillator, high voltage switched current source
- Spec name: Current limit and thermal shutdown circuitry
- Spec name: Start-up and operating power derived from DRAIN pin voltage
- Spec name: Auto-restart, line under voltage sense, and frequency jittering
- Spec name: Fully integrated auto-restart for short circuit and open loop fault protection
- Spec name: Programmable line under voltage detect feature
- Spec name: Operating frequency of 132 kHz
Top Features:
- Auto-restart for fault protection
- Practically eliminates audible noise
- Programmable line under voltage detect
- Frequency jittering reduces EMI
The TYN268PN integrates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit, and thermal shutdown circuitry onto a monolithic device. The start-up and operating power are derived directly from the voltage on the DRAIN pin, eliminating the need for a bias winding and associated circuitry.
The Tiny Switch-II devices incorporate auto-restart, line under voltage sense, and frequency jittering. An innovative design minimizes audio frequency components in the simple ON/OFF control scheme to practically eliminate audible noise with standard taped/varnished transformer construction.
The fully integrated auto-restart circuit safely limits output power during fault conditions such as output short circuit or open loop, reducing component count and secondary feedback circuitry cost. An optional line sense resistor externally programs a line under voltage threshold, which eliminates power down glitches caused by the slow discharge of input storage capacitors present in applications such as standby supplies.
The operating frequency of 132 kHz is jittered to significantly reduce both the quasi-peak and average EMI, minimizing filtering cost.
Related Document: TYN268PN IC Data Sheet
* Images are for illustration only; actual product may vary.