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FSA4476 Datasheet(PDF) 11 Page - ON Semiconductor |
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FSA4476 Datasheet(HTML) 11 Page - ON Semiconductor |
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11 / 15 page  © 2016 Semiconductor Components Industries, LLC www.onsemi.com FSA4476 Rev. 1.3.2 10 Application Information Dead Battery FSA44776 supports dead battery application. When power is not applied to FSA4476 and it is attached to a Source device, then the Source would pull up the CC line connected through the cable. FSA4476 in response would turn on the pull-down that will bring the CC voltage to a range that the Source can detect an attach event and turn on VBUS. Headset detection FSA4476 integrates headset unplug detection function by detecting the CCx_H voltage. The headset detection is only active during audio switch on status (EN1=1). When headset is attached ( both CC1_H and CC2_H are Low), the flag signal is sent low to host controller by INT1 (INT1= low). Once either of CCx_H= High (CCx_H>1.5V), INT1 will be released to high by external pull up resistor. Power supply configuration VBUS VBAT Power supply Invalid Invalid Max (VBAT , VBUS) Valid Invalid VBUS Invalid Valid VBAT Valid Valid VBAT |
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