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TNY263G Datasheet(PDF) 6 Page - Power Integrations, Inc. |
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TNY263G Datasheet(HTML) 6 Page - Power Integrations, Inc. |
6 / 22 page Rev. H 02/09 6 TNY263-268 www.powerint.com Figure 12. Normal Power-down Timing (without UV). Figure 13. Slow Power-down Timing with Optional External (2 M Ω) UV Resistor Connected to EN/UV Pin. Figure 10. TinySwitch-II Power-up with Optional External UV Resistor (2 M Ω) 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. two main benefits. First, for a nominal application, this eliminates the cost of a bias winding and associated components. Secondly, for battery charger applications, the current-voltage characteristic often allows the output voltage to fall close to zero volts while still delivering power. This type of application normally requires a forward-bias winding which has many more associated components. With TinySwitch-II, neither are necessary. For applications that require a very low no-load power consumption (50 mW), a resistor from a bias winding to the BYPASS pin can provide the power to the chip. The minimum recommended current supplied is 750 μA. The BYPASS pin in this case will be clamped at 6.3 V. This method will eliminate the power draw from the DRAIN pin, thereby 0 2.5 5 Time (s) 0 100 200 400 300 0 100 200 V DC-INPUT V DRAIN 0 12 Time (ms) 0 200 400 5 0 10 0 100 200 V DC-INPUT V BYPASS V DRAIN 0 12 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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