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LT8697 Datasheet(PDF) 33 Page - Analog Devices |
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LT8697 Datasheet(HTML) 33 Page - Analog Devices |
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33 / 40 page  LT8698S/LT8698S-1 33 Rev. A For more information www.analog.com APPLICATIONS INFORMATION On Off VBUS DISCHARGE SWITCHING REGULATOR µCONTROLLER INPUT TO LT8698S SEL1-3 PINS LT8698S TIME COMMENTS VBUS STATUS VBUS RESET TIMING DIAGRAM FLT 10mA IBUS On Off On Off On Off On Off 5V 0V UNSUCCESSFUL VBUS RESET ATTEMPT STATUS HIGH INDICATES VBUS DISCHARGE CYCLE COMPLETE, FLT PULLS LOW FOR 4.2ms TO INDICATE VBUS DISCHARGE NOT SUCCESSFUL STATUS HIGH INDICATES VBUS DISCHARGE CYCLE COMPLETE, FLT STAYS HIGH TO INDICATE VBUS DISCHARGE SUCCESSFUL SUCCESSFUL VBUS RESET ATTEMPT ~2ms ~2ms ~4.5ms ~400ms –520ms 9ms 9ms Figure 15. VBUS RESET Diagram Figure 16. VBUS RESET Sequence (a) Unsuccessful Bus Reset (b) Successful Bus Reset Unsuccessful Bus Reset 8200µF OUTPUT CAP 100ms/DIV SEL1 5V/DIV VBUS 2V/DIV ____ FLT 5V/DIV STATUS 5V/DIV 8698S F16a Succesfull Bus Reset 22µF OUTPUT CAP 100ms/DIV SEL1 5V/DIV VBUS 2V/DIV ____ FLT 5V/DIV STATUS 5V/DIV 8698S F16b |
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