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TNY256P Datasheet(PDF) 1 Page - Power Integrations, Inc. |
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TNY256P Datasheet(HTML) 1 Page - Power Integrations, Inc. |
1 / 20 page TNY256 TinySwitch ® Plus Energy Efficient, Low Power Off-line Switcher July 2001 ® Figure 1. Typical Standby Application. ORDER PART NUMBER 85-265 VAC 230 VAC or 115 VAC w/Doubler Product Highlights TinySwitch Plus Features • Extended power range • Fully integrated auto-restart reduces short circuit current • Line under-voltage sense eliminates turn-off glitches • Frequency jittering dramatically reduces EMI (5 to 10 dB) • TO-220 package option Lowest Cost, Low Power Switcher Solution • Lower cost than RCC, discrete PWM and other integrated/hybrid solutions • Cost effective replacement for bulky linear adapters • Lowest component count • Simple ON/OFF control – no loop compensation components • No bias winding – simpler, lower cost transformer • Designed to work with low cost external components Extremely Energy Efficient • Consumes only 30/60 mW at 115/230 VAC with no load • Meets Blue Angel, Energy Star, Energy 2000 and 200mW European cell phone requirements for standby • Saves $1 to $4 per year in energy costs (at $0.12/kWHr) compared to bulky linear adapters • Ideal for cellular phone chargers and adapters High Performance at Low Cost • High voltage powered – ideal for charger applications • High bandwidth provides fast turn on with no overshoot • Current limit operation rejects line frequency ripple • Built-in current limit and thermal protection Description The TNY256 extends the power range of the TinySwitch family of energy efficient, low power off-line switchers. TinySwitch devices use a breakthrough design to provide the lowest cost, high efficiency, off-line switching solution for low power applications. They integrate a 700 V power MOSFET, oscillator, high voltage switched current source, current limit and thermal shutdown circuitry into a single, monolithic device. The devices start-up and operate on power derived from the DRAIN voltage, eliminating the need for a transformer bias winding and associated circuitry. TinySwitch's low operating current allows power supply no-load consumption to be kept under 100 mW, even at 265 VAC input. TNY256P OUTPUT POWER CAPABILITY* PACKAGE DIP-8 SMD-8 TNY256G 5-10 W 8-15 W The TinySwitch Plus incorporates auto-restart, line under-voltage sense, and frequency jittering features. The auto-restart circuit safely limits output power during fault conditions such as output short or open loop. The auto-restart circuit is fully integrated and does not require external timing components. The line under- voltage sense threshold can be externally programmed using a line sense resistor. During start-up, this feature keeps the TNY256 off until the input line voltage reaches the under-voltage threshold. When the input line voltage is removed, the line under-voltage circuit prevents auto-restart attempts after the output goes out of regulation. This eliminates power down glitches caused by the slow discharge of input storage capacitors present in applications such as standby supplies. A single resistor is used to implement thisfeature,eliminatingwhatnormallytakesfivetosixcomponents. Thelinesenseresistorisoptional.TheTNY256operatingfrequency of 130 kHz is jittered (frequency modulated) to reduce both quasi- peak and average EMI, minimizing filtering costs. Table 1. * The low end of the power ranges shown represent enclosed adapters with minimal heat sinking whereas, the high end of the power ranges represent open frame power supplies with adequate heat sinking, both measured at an ambient of 50 oC. Please refer to the Key Application Considerations section for more details. TNY256Y TO-220-7B PI-2363-022699 Wide-Range HV DC Input D S EN/UV BP + – + – DC Output TinySwitch Plus Optional UV Resistor 8-19 W 5-11 W |
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