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TPS25940 Datasheet(PDF) 32 Page - Texas Instruments

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Part # TPS25940
Description  2.7-V to 18-V eFuse with Integrated Short-to-Battery Protection
PDF  50 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS25940 Datasheet(HTML) 32 Page - Texas Instruments

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CdVdT
R1
R2
R3
42
PŸ
IN
OUT
GND
TPS25940-Q1
ILIM
IMON
RILIM
*
CIN
5 V Power Bus
COUT
R4
EN/UVLO
OVP
IN
dVdT
OUT
DEVSLP
USB Connector
FLT
VBUS
D-
D+
GND
PGTH
PGOOD
32
TPS25940-Q1
SLVSDJ0C – MAY 2016 – REVISED JULY 2018
www.ti.com
Product Folder Links: TPS25940-Q1
Submit Documentation Feedback
Copyright © 2016–2018, Texas Instruments Incorporated
Figure 69. Hot Plug-in with Short on Output: Latched - TPS25940L-Q1
9.2.4 System Examples
9.2.4.1 VBUS Short-to-Battery, Short-to-Ground Protection of USB Port in Automotive Systems
The TPS25940x-Q1 eFuse offers robust protection for the 5 V Power rail of USB ports under faults conditions
like Short-to-Ground, Short-to-Battery and Overload.
5-V Power rail gets disconnected from the output within approximately 200 nsec during short circuit to Ground
fault.
The eFuse monitors the reverse voltage from IN to OUT and when it exceeds –66 mV, it stops the flow of
reverse current. This operation protects the 5-V power rail from Short-to-Battery faults.
Typical application schematic of TPS25940x-Q1 usage in USB port protection for automotive application is
shown in Figure 70.
Figure 70. Automotive USB Hub-Port – VBUS Short to Battery, VBUS Short to GND Protection
Figure 71 and Figure 72 show the performance of TPS25940-Q1 under Short-to-Battery and Short-to-Ground
faults.



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