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UCS1002-2 数据表(PDF) 21 Page - Microchip Technology |
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UCS1002-2 数据表(HTML) 21 Page - Microchip Technology |
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21 / 114 page  Programmable USB Port Power Controller with Charger Emulation Datasheet SMSC UCS1002 21 Revision 1.4 (07-16-13) DATASHEET Short Circuit Response Time tSHORT_LIM 1.5 µs Time from detection of short to current limit applied. No CBUS applied Short Circuit Detection Time tSHORT 6 ms Time from detection of short to port power switch disconnect and ALERT# pin assertion. Latched Mode Cycle Time tUL 7 ms From PWR_EN edge transition from inactive to active to begin error recovery Auto-recovery Mode Cycle Time tCYCLE 25 ms Time delay before error condition check Programmable 15-50 ms, default listed Auto-recovery Delay tRST 20 ms Portable device attached, VBUS must be > VTEST after this time Programmable 10-25 ms, default listed Discharge Time tDISCHARGE 200 ms Amount of time discharge resistor applied Programmable 100-400 ms, default listed Port Power Switch Operation With Trip Mode Current Limiting Region 2 Current Keep- out IBUS_R2MIN 0.1 A Minimum VBUS Allowed at Output VBUS_MIN 2.0 V Port Power Switch Operation With Constant Current Limiting (Variable Slope) Region 2 Current Keep- out IBUS_R2MIN 1.5 A Minimum VBUS Allowed at Output VBUS_MIN 2.0 V Port Power Switch Operation With Custom Current Limiting Region 2 Current Keep- out IBUS_R2MIN 0.1 A Programmable from 100 mA to 1.8 A. Default value listed. Minimum VBUS Allowed at Output VBUS_MIN 2.0 V Programmable from 1.5 V to 2.25 V. Default value listed. Current Measurement - DC Current Measurement Range IBUS_M 6.4 2500 mA Range (see Note 3.3) Table 3.3 Electrical Specifications (continued) VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, VPULLUP = 3V to 5.5V, TA = -40 °C to 85 °C all Typical values at VDD = VS = 5 V, TA = 27 °C unless otherwise noted. CHARACTERISTIC SYMBOL MIN TYP MAX UNIT CONDITIONS |
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