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TinySwitch-III incorporates a 700 V power MOSFET, oscillator, high voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design flexible solution with a low system cost and extended power capability.
TNY274-280 Maximum Ratings
DRAIN Voltage .................................. ............-0.3 V to 700 V DRAIN Peak Current: TNY274.......................400 (750) mA(2) TNY275.....................560 (1050) mA(2) TNY276.....................720 (1350) mA(2) TNY277.....................880 (1650) mA(2) TNY278...................1040 (1950) mA(2) TNY279 ................. 1200 (2250) mA(2) TNY280 ................. 1360 (2550) mA(2) EN/UV Voltage ................................................... -0.3 V to 9 V EN/UV Current ........................................................... 100 mA BP/M Voltage ................................................. ....-0.3 V to 9 V Storage Temperature ................................-65 °C to 150 °C Operating Junction Temperature( ..............-40 °C to 150 °C Lead Temperature(4) ................................................ 260 °C Notes: 1. All voltages referenced to SOURCE, TA = 25 °C. 2. The higher peak DRAIN current is allowed while the DRAIN voltage is simultaneously less than 400 V. 3. Normally limited by internal circuitry. 4. 1/16 in. from case for 5 seconds. 5. Maximum ratings specified may be applied one at a time, without causing permanent damage to the product. Exposure to Absolute Maximum Rating conditions for extended periods of time may affect product reliability.
TNY274-280 Features
• Accurate hysteretic thermal shutdown protection with automatic recovery eliminates need for manual reset • Improved auto-restart delivers <3% of maximum power in short circuit and open loop fault conditions • Output overvoltage shutdown with optional Zener • Line under-voltage detect threshold set using a single optional resistor • Very low component count enhances reliability and enables single-sided printed circuit board layout • High bandwidth provides fast turn on with no overshoot and excellent transient load response • Extended creepage between DRAIN and all other pins improves field reliability
TNY274-280 Typical Application
• Chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio, shavers, etc. • PC Standby and other auxiliary supplies • DVD/PVR and other low power set top decoders • Supplies for appliances, industrial systems, metering, etc.