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TUSB321 Datasheet(PDF) 6 Page - Texas Instruments |
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TUSB321 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 24 page  0 V VBUS_THR VVBUS Time tVBUS_DB 0 V VPULL-UP Time tFAULT VVCONN_FAULT 6 TUSB321 SLLSEO6B – JUNE 2015 – REVISED SEPTEMBER 2016 www.ti.com Product Folder Links: TUSB321 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated Electrical Characteristics (continued) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Rp_cm_med External pull-up resistor on CURRENT_MODE pin to advertise 1.5-A current 500 kΩ Rp_cm_high External pull-up resistor on CURRENT_MODE pin to advertise 3.0-A current 10 kΩ VBUS_DET IO Pins (Connected to System VBUS signal through external resistor) VBUS_THR VBUS threshold range 2.95 3.30 3.80 V RVBUS External resistor between VBUS and VBUS_DET pin 891 900 909 KΩ RVBUS_PD Internal pulldown resistance for VBUS_DET 95 KΩ DIR pin (Open Drain IO) VOL Low-level signal output voltage IOL = –1.6 mA 0.4 V VCONN RON On resistance of the VCONN power FET 1.25 Ω VTOL Voltage tolerance on VCONN power FET 5.5 V VPASS Voltage to pass through VCONN power FET 5.5 V IVCONN VCONN current limit; VCONN is disconnected above this value 200 mA CBULK Bulk capacitance on VCONN; placed on VDD supply 10 200 µF 6.6 Switching Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER MIN TYP MAX UNIT tCCCB_DEFAULT Power on default of CC1 and CC2 voltage debounce time 133 ms tVBUS_DB Debounce of VBUS_DET pin after valid VBUS_THR (See Figure 1.) 2 ms tDRP_DUTY_CYCLE Power-on default of percentage of time DRP advertises DFP during a TDRP 30% tDRP The period TUSB321 in DFP mode completes a DFP to UFP and back advertisement. 50 75 100 ms tFAULT VCONN_FAULT asserted low time after VCONN over-current condition is detected. (See Figure 2.) 7 10 13 µs Figure 1. VBUS Detect and Debounce Figure 2. VCONN_FAULT Assertion Pulse Timing |
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