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TPS65982ABZBHR Datasheet(PDF) 15 Page - Texas Instruments |
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TPS65982ABZBHR Datasheet(HTML) 15 Page - Texas Instruments |
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15 / 121 page  15 TPS65982 www.ti.com SLVSD02D – MARCH 2015 – REVISED JUNE 2019 Product Folder Links: TPS65982 Submit Documentation Feedback Copyright © 2015–2019, Texas Instruments Incorporated (1) UI denotes the time to transmit an un-encoded data bit not the shortest high or low times on the wire after encoding with BMC. A single data bit cell has duration of 1 UI, but a data bit cell with value 1 will contain a centrally place 01 or 10 transition in addition to the transition at the start of the cell. (2) The capacitance of the bulk cable is not included in the CCBLPLUG definition. It is modeled as a transmission line. (3) CRECEIVER includes only the internal capacitance on a C_CCn pin when the pin is configured to be receiving BMC data. External capacitance is needed to meet the required minimum capacitance per the USB-PD Specifications. TI recommends to add capacitance to bring the total pin capacitance to 300 pF for improved TX behavior. (4) BMC packet collision is avoided by the detection of signal transitions at the receiver. Detection is active when a minimum of NCOUNT transitions occur at the receiver within a time window of TTRANWIN. After waiting TTRANWIN without detecting NCOUNT transitions, the bus is declared idle. (5) Broadband noise ingression is because of coupling in the cable interconnect. 7.9 USB-PD Baseband Signal Requirements and Characteristics Recommended operating conditions; TA = –10 to 85°C unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT COMMON PD_BITRATE PD data bit rate 270 300 330 Kbps UI(1) Unit interval (1/PD_BITRATE) 3.03 3.33 3.7 μs CCBLPLUG(2) Capacitance for a cable plug (each plug on a cable may have up to this value) 25 pF ZCABLE Cable characteristic impedance 32 65 Ω CRECEIVER(3) Receiver capacitance. Capacitance looking into C_CCn pin when in receiver mode 70 120 pF TRANSMITTER ZDRIVER TX output impedance. Source output impedance at the Nyquist frequency of USB2.0 low speed (750kHz) while the source is driving the C_CCn line 33 75 Ω TRISE Rise Time. 10% to 90% amplitude points, minimum is under an unloaded condition. Maximum set by TX mask 300 ns TFALL Fall Time. 90% to 10% amplitude points, minimum is under an unloaded condition. Maximum set by TX mask 300 ns RECEIVER VRXTR Rx Receive Rising Input threshold 605 630 655 mV VRXTF Rx Receive Falling Input threshold 450 470 490 mV NCOUNT(4) Number of transitions for signal detection (number to count to detect non-idle bus) 3 TTRANWIN(4) Time window for detecting non-idle bus 12 20 μs ZBMCRX Receiver input impedance Does not include pullup or pulldown resistance from cable detect. Transmitter is Hi-Z. 10 MΩ TRXFILTER(5) Rx bandwidth limiting filter. Time constant of a single pole filter to limit broadband noise ingression 100 ns (1) VTXP voltage settings are determined by application code and the setting used must meet the needs of the application and adhere to the USB-PD Specifications. 7.10 USB-PD TX Driver Voltage Adjustment Parameter Recommended operating conditions; TA = –10 to 85°C unless otherwise noted (1) PARAMETER TEST CONDITIONS MIN NOM MAX UNIT VTXP0 TX transmit peak voltage 1.615 1.7 1.785 V VTXP1 TX transmit peak voltage 1.52 1.6 1.68 V VTXP2 TX transmit peak voltage 1.425 1.5 1.575 V VTXP3 TX transmit peak voltage 1.33 1.4 1.47 V VTXP4 TX transmit peak voltage 1.235 1.3 1.365 V VTXP5 TX transmit peak voltage 1.188 1.25 1.312 V VTXP6 TX transmit peak voltage 1.14 1.2 1.26 V VTXP7 TX transmit peak voltage 1.116 1.175 1.233 V VTXP8 TX transmit peak voltage 1.092 1.15 1.208 V VTXP9 TX transmit peak voltage 1.068 1.125 1.181 V |
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