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TPS254900AIRVCTQ1 Datasheet(PDF) 1 Page - Texas Instruments

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Part No. TPS254900AIRVCTQ1
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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TPS254900AIRVCTQ1 Datasheet(HTML) 1 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
DP_OUT
DM_OUT
IMON
OVP_SEL
Logic I/O
BIAS
2.2 µF
10 F
µ
To Host
Controller
Copyright © 2017, Texas Instruments Incorporated
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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS254900A-Q1
SLUSCU5A – NOVEMBER 2017 – REVISED JANUARY 2018
TPS254900A-Q1 Automotive USB Host Charger With Short-to-VBATT Protection
1
1 Features
1
Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
Device HBM ESD Classification Level H2
Device CDM ESD Classification Level C5
4.5-V to 6.5-V Input Operating Range
3.5-V (typ) UVLO to Support Start-Stop
Integrated 45-mΩ (typ.) High-Side MOSFET
3.2-A Maximum Continuous Output Current
VBUS ±5% Cable Compensation Accuracy at
Connector
Supports USB BC 1.2 CDP and SDP Modes
Short-to-Battery Protection on OUT, DP_IN, and
DM_IN Pins
DP_IN and DM_IN IEC 61000-4-2 Rated
±8-kV Contact and ±15-kV Air Discharge
20-Pin QFN (3-mm × 4-mm) Package
2 Applications
Automotive USB Charging Ports (Host and Hubs)
Automotive USB Protection
3 Description
The TPS254900A-Q1 device is a USB charging-port
controller and power switch with short-to-battery
protection. This feature provides protection on OUT,
DM_IN and DP_IN. These three pins withstand
voltage up to 18 V.
The internal MOSFET turns off quickly when the
short-to-battery condition occurs. Rapid turnoff is very
important to protect the upstream DC-DC converter,
processor, or hub data lines.
The TPS254900A-Q1 has a low UVLO of 3.5 V, so
that the power switch does not turn off during start-
stop.
The TPS254900A-Q1 45-m
Ω power switch has two
selectable, adjustable current limits that support port
power management by changing to a lower current
limit when adjacent ports are experiencing heavy
loads. This is important in systems with multiple ports
and upstream power supplies with limited capacity.
The TPS254900A-Q1 device has a current-sense
output that is able to control an upstream supply,
which allows it to maintain 5 V at the USB port even
with
heavy
charging
currents.
This
feature
is
important in systems with long USB cables where
significant voltage drops can occur with fast-charging
portable devices.
A current monitor allows a system to monitor the load
current in real time by monitoring the IMON voltage.
The current monitor is very useful and can be used
for dynamic port-power management.
The TPS254900A-Q1 device also provides ESD
protection capability per IEC 61000-4-2, level 4 on
DP_IN and DM_IN.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS254900A-Q1
WQFN (20)
3.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Schematic


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