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TPS65982ABZBHR Datasheet(PDF) 48 Page - Texas Instruments |
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TPS65982ABZBHR Datasheet(HTML) 48 Page - Texas Instruments |
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48 / 121 page  PP_5V0 VBUS Fast current limit PP_5V0 Gate Control and Current Limit VHVDISPD Slew Rate Controlled Pulldown Time TSTABLE Old Voltage New Voltage SRNEG VSRCVALID (min) VSRCNEW (min) VSRCNEW (max) VSRCVALID (max) 48 TPS65982 SLVSD02D – MARCH 2015 – REVISED JUNE 2019 www.ti.com Product Folder Links: TPS65982 Submit Documentation Feedback Copyright © 2015–2019, Texas Instruments Incorporated Figure 35. Negative Voltage Transition on VBUS 9.3.3.19 HV Transition to PP_RV0 Pull-Down on VBUS The TPS65982 has an integrated active pulldown on VBUS when transitioning from PP_HV to PP_5V0, shown in Figure 36. When the PP_HV switch is disabled and VBUS > PP_5V0 + VHVDISPD, amplifier turns on a current source and pulls down on VBUS. The amplifier implements active slew rate control by adjusting the pulldown current to prevent the slew rate from exceeding specification. When VBUS falls to within VHVDISPD of PP_5V0, the pulldown is turned off. The load on VBUS will then continue to pull VBUS down until the ideal diode switch structure turns on connecting it to PP_5V0. When switching from PP_HV or PP_EXT to PP_5V0, PP_HV or PP_EXT must be above VSO_HV to follow the switch-over shown in Figure 35. Figure 36. PP_5V0 Slew Rate Control 9.3.3.20 VBUS Transition to VSAFE0V When VBUS transitions to near 0 V (VSAFE0V), the pulldown circuit in Figure 36 is turned on until VBUS reaches VSAFE0V. This transition will occur within time TSAFE0V. 9.3.3.21 C_CC1 and C_CC2 Power Configuration and Power Delivery The C_CC1 and C_CC2 pins are used to deliver power to active circuitry inside a connected cable and output USB-PD data to the cable and connected device. Figure 20 shows the C_CC1, and C_CC2 outputs to the port. Only one of these pins will be used to deliver power at a time depending on the cable orientation. The other pin will be used to transmit USB-PD data through the cable to a connected device. |
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