The TNY268 integrates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit, and thermal shutdown circuitry onto a monolithic device IC. 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. In addition, the TNY268 device incorporates 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 undervoltage 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.
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TNY267 Power Integrations AC/DC Converters
Original price was: ₨ 250.₨ 200Current price is: ₨ 200.
TNY274PN Power Integrations Off-Line Switcher IC
Original price was: ₨ 250.₨ 200Current price is: ₨ 200.
Tny268 Power Integrations Off-Line Switcher Ic
Original price was: ₨ 200.₨ 195Current price is: ₨ 195.
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