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TNY264P Datasheet(PDF) 6 Page - Power Integrations, Inc. |
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TNY264P Datasheet(HTML) 6 Page - Power Integrations, Inc. |
6 / 24 page 6 G4/05 TNY263-268 Figure 12. Normal Power-down Timing (without UV). Figure 13. Slow Power-down Timing with Optional External (2 MΩ) UV Resistor Connected to EN/UV Pin. Figure 10. TinySwitch-II Power-up with Optional External UV Resistor (2 MΩ) Connected to EN/UV Pin. Figure 11. TinySwitch-II Power-up without Optional External UV Resistor Connected to EN/UV Pin. PI-2661-072400 V DRAIN V EN CLOCK D DRAIN I MAX Figure 9. TinySwitch-II Operation at Very Light Load. During power-down, when an external resistor is used, the power MOSFET will switch for 50 ms after the output loses regulation. The power MOSFET will then remain off without any glitches since the under-voltage function prohibits restart when the line voltage is low. Figure 12 illustrates a typical power-down timing waveform of TinySwitch-II . Figure 13 illustrates a very slow power-down timing waveform of TinySwitch-II as in standby applications. The external resistor (2 MΩ) is connected to the EN/UV pin in this case to prevent unwanted restarts. 0 2.5 5 Time (s) 0 100 200 400 300 0 100 200 V DC-INPUT V DRAIN 0 1 2 Time (ms) 0 200 400 5 0 10 0 100 200 V DC-INPUT V BYPASS V DRAIN 0 1 2 Time (ms) 0 200 400 5 0 10 0 100 200 V DC-INPUT V BYPASS V DRAIN 0 .5 1 Time (s) 0 100 200 300 0 100 200 400 V DC-INPUT V DRAIN |
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