TPS65983B datasheet(13/117 Pages) TI1

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TPS65983B

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SLVSDM6A – OCTOBER 2016 – REVISED OCTOBER 2016

Product Folder Links: TPS65983B

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(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. It is recommended 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 due to 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)

ZCABLE

Cable characteristic impedance

CRECEIVER(3)

Receiver capacitance. Capacitance looking into C_CCn pin

when in receiver mode.

120

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.

TRISE

Rise Time. 10% to 90% amplitude points, minimum is under an

unloaded condition. Maximum set by TX mask.

300

TFALL

Fall Time. 90% to 10% amplitude points, minimum is under an

unloaded condition. Maximum set by TX mask.

300

RECEIVER

VRXTR

Rx Receive Rising Input threshold

605

630

655

VRXTF

Rx Receive Falling Input threshold

450

470

490

NCOUNT(4)

Number of transitions for signal detection (number to count to

detect non-idle bus).

TTRANWIN(4)

Time window for detecting non-idle bus.

μs

ZBMCRX

Receiver input impedance

Does not include pullup or

pulldown resistance from

cable detect. Transmitter is

Hi-Z.

MΩ

TRXFILTER(5)

Rx bandwidth limiting filter. Time constant of a single pole filter

to limit broadband noise ingression

100

(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

(1)

Recommended operating conditions; TA = –10 to +85°C unless otherwise noted

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

VTXP0

TX Transmit Peak Voltage

1.615

1.7

1.785

VTXP1

TX Transmit Peak Voltage

1.52

1.6

1.68

VTXP2

TX Transmit Peak Voltage

1.425

1.5

1.575

VTXP3

TX Transmit Peak Voltage

1.33

1.4

1.47

VTXP4

TX Transmit Peak Voltage

1.235

1.3

1.365

VTXP5

TX Transmit Peak Voltage

1.188

1.25

1.312

VTXP6

TX Transmit Peak Voltage

1.14

1.2

1.26

VTXP7

TX Transmit Peak Voltage

1.116

1.175

1.233

VTXP8

TX Transmit Peak Voltage

1.092

1.15

1.208

VTXP9

TX Transmit Peak Voltage

1.068

1.125

1.181

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