TMUX7462F datasheet(21/37 Pages) TI

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7.4 Fault Response Time

Fault response time (tRESPONSE) measures the delay between the source voltage exceeding the fault supply

voltage (VFP or VFN) by 0.5V and the drain voltage failing to 90% of the fault supply voltage exceeded. Figure 7-5

shows the setup used to measure tRESPONSE.

0 V

tRESPONSE (FP)

Output

VFP + 0.5 V

0 V

Output × 90%

VFP

0 V

tRESPONSE (FN)

Output

VFN - 0.5 V

0 V

Output × 90%

VFN

tRESPONSE = max ( tRESPONSE(FP), tRESPONSE(FN))

GND

All other source &

drain pins

Output

VDD VSS

VFP VFN

VDD

VSS

0.1 µF

GND

0.1 µF

GND

0.1 µF

GND

VFN

0.1 µF

GND

VFP

60V/µs

ramp

60V/µs

ramp

Max positive fault

Max negative fault

Figure 7-5. Fault Response Time Measurement Setup

7.5 Fault Recovery Time

Fault recovery time (tRECOVERY) measures the delay between the source voltage falling from overvoltage

condition to below fault supply voltage (VFP or VFN) plus 0.5 V and the drain voltage rising from 0V to 50%

of the fault supply voltage exceeded. Figure 7-6 shows the setup used to measure tRECOVERY.

tRECOVERY (FP)

Output

VFP + 0.5 V

0 V

VFP × 0.5

Output

0 V

tRECOVERY = max ( tRECOVERY(FP), tRECOVERY(FN))

0 V

VFN - 0.5 V

0 V

VFN × 0.5

tRECOVERY (FN)

GND

All other

source &

drain pins

Output

VDD VSS

VFP VFN

VDD

VSS

0.1 µF

GND

0.1 µF

GND

0.1 µF

GND

VFN

0.1 µF

GND

VFP

VFP - 2 V

VFN + 2 V

Figure 7-6. Fault Recovery Time Measurement Setup

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TMUX7462F

SCDS394A – MARCH 2021 – REVISED OCTOBER 2021

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