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TNY268P Datasheet(PDF) 10 Page - Power Integrations, Inc. |
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TNY268P Datasheet(HTML) 10 Page - Power Integrations, Inc. |
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10 / 22 page  Rev. H 02/09 10 TNY263-268 www.powerint.com Key Application Considerations TinySwitch-II vs. TinySwitch Table 2 compares the features and performance differences between the TNY254 device of the TinySwitch-II family with the TinySwitch-II family of devices. Many of the new features eliminate the need for or reduce the cost of circuit components. Other features simplify the design and enhance performance. Design Output Power Table 1 (front page) shows the practical continuous output power levels that can be obtained under the following conditions: Table 2. Comparison Between TinySwitch and TinySwitch-II. *Not available. ** See typical performance curves. The minimum DC input voltage is 90 V or higher for 85 VAC input, or 240 V or higher for 230 VAC input or 115 VAC input with a voltage doubler. This corresponds to a filter capacitor of 3 μF/W for universal input and 1 μF/W for 230 VAC or 115 VAC with doubler input. A secondary output of 5 V with a Schottky rectifier diode. Assumed efficiency of 77% (TNY267 & TNY268), 75% (TNY265 & TNY266) and 73% (TNY263 & TNY264). The parts are board mounted with SOURCE pins soldered to sufficient area of copper to keep the die temperature at or below 100 °C. In addition to the thermal environment (sealed enclosure, ventilated, open frame, etc.), the maximum power capability of TinySwitch-II in a given application depends on transformer 1. 2. 3. 4. TinySwitch-II vs. TinySwitch Function TinySwitch TNY254 TinySwitch-II TNY263-268 TinySwitch-II Advantages Switching Frequency and Tolerance Temperature Variation (0-100 °C)** 44 kHz ±10% (at 25 °C) +8% 132 kHz ±6% (at 25 °C) +2%) Smaller transformer for low cost Ease of design Manufacturability Optimum design for lower cost • • • • Active Frequency Jitter N/A* ±4 kHz Lower EMI minimizing filter component costs • Transformer Audible Noise Reduction N/A* Yes–built into controller Practically eliminates audible noise with ordinary dip varnished transformer – no special construction or gluing required • Line UV Detect N/A* Single resistor programmable Prevents power on/off glitches • Current Limit Tolerance Temperature Variation (0-100 °C)** ±11% (at 25 °C) -8% ±7% (at 25 °C) 0%) Increases power capability and simplifies design for high volume manufacturing • Auto-Restart N/A* 6% effective on-time Limits output short-circuit current to less than full load current No output diode size penalty Protects load in open loop fault conditions No additional components required • • • • BYPASS Pin Zener Clamp N/A* Internally clamped to 6.3 V Allows TinySwitch-II to be powered from a low voltage bias winding to improve efficiency and to reduce on-chip power dissipation • DRAIN Creepage at Package 0.037 in. / 0.94 mm 0.137 in. / 3.48 mm Greater immunity to arcing as a result of dust, debris or other contaminants build-up • |
Similar Part No. - TNY268P |
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Similar Description - TNY268P |
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