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TPS254900A-Q1 Datasheet(PDF) 26 Page - Texas Instruments

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Part No. TPS254900A-Q1
Description  Automotive USB Host Charger With Short-to-VBATT Protection
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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TPS254900A-Q1 Datasheet(HTML) 26 Page - Texas Instruments

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IN
OUT
DP_IN
DM_IN
ILIM_LO
ILIM_HI
GND
CTL1
CTL2
CS
EN
TPS254900A-Q1
5 V
EN
FAULT
FAULT
STATUS
STATUS
Mode
Select I/O
V
BUS
D+
D–
GND
ADC
Upstream DC-DC
Converter
DP_OUT
DM_OUT
IMON
OVP_SEL
Logic I/O
BIAS
2.2 µF
0805
50 V
X7R
10 µF
1210
35 V
X7R
To Host
Controller
Copyright © 2017, Texas Instruments Incorporated
26
TPS254900A-Q1
SLUSCU5A – NOVEMBER 2017 – REVISED JANUARY 2018
www.ti.com
Product Folder Links: TPS254900A-Q1
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Copyright © 2017–2018, Texas Instruments Incorporated
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The TPS254900A-Q1 device is a USB charging-port controller and power switch with cable compensation and
short-to-battery protection for VBUS, D+, and D–. The device is typically used for automotive USB port protection
and as a USB charging controller. The following design procedure can be used to select components for the
TPS254900A-Q1 device. This section presents a simplified discussion of how to choose external components for
VBUS, D+, and D– short-to-battery protection. For cable-compensation design information, see the data sheet
(SLUSCE3) for the TPS2549-Q1 device, which has features and design considerations very similar to those of
the TPS254900A-Q1 device.
9.2 Typical Application
For an automotive USB charging port, the VBUS, D+, and D– pins are exposed and require a protection device.
The protection required includes VBUS overcurrent, D+ and D– ESD protection, and short-to-battery protection.
This charging-port device protects the upstream dc-dc converter (bus line) and automotive SOC or hub chips (D+
and D– data lines). An application schematic of this circuit with short-to-battery protection is shown in Figure 43.
Figure 43. Typical Application Schematic: USB Port Charging With Cable Compensation


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