TPS254900-Q1 Datasheet, PDF (1/40 Pages) Texas Instruments – Automotive USB Host Charger With Short-to-VBATT Protection

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TPS254900-Q1
SLUSCO9A – SEPTEMBER 2016 – REVISED OCTOBER 2016
TPS254900-Q1 Automotive USB Host Charger With Short-to-V_BATT Protection
1 Features
•1 AEC-Q100 Qualified With the Following Results:
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C5
• 4.5-V to 6.5-V Input Operating Range
• Integrated 45-mΩ (typ.) High-Side MOSFET
• 3-A Maximum Continuous Output Current
• V_BUS ±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 TPS254900-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 TPS254900-Q1 45-mΩ 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 TPS254900-Q1 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 TPS254900-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)
TPS254900-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
5V
EN
FAULT
STATUS
To Host
Controller
Mode
Select I/O
Logic I/O
Upstream DC-DC
ADC
TPS254900-Q1
IN
DM_OUT
DP_OUT
EN
FAULT
STATUS
CTL1
CTL2
OVP_SEL
CS
IMON
OUT
DM_IN
DP_IN
BIAS
ILIM_LO
ILIM_HI
GND
10 µF
2.2 µF
V_BUS
D–
D+
GND
Copyright © 2016, Texas Instruments Incorporated
1
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.