• Menu
  • Product
  • Email
  • PDF
  • Order now

  • TPS254900-Q1 Automotive USB Host Charger With Short-to-VBATT Protection

    • SLUSCO9A September   2016  – October 2016 TPS254900-Q1

      PRODUCTION DATA.  

  • CONTENTS
  • SEARCH
  • TPS254900-Q1 Automotive USB Host Charger With Short-to-VBATT Protection
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  FAULT Response
      2. 8.3.2  Cable Compensation
        1. 8.3.2.1 Design Procedure
      3. 8.3.3  D+ and D- Protection
      4. 8.3.4  VBUS OVP Protection
      5. 8.3.5  Output and D+ or D- Discharge
      6. 8.3.6  Port Power Management (PPM)
        1. 8.3.6.1 Benefits of PPM
        2. 8.3.6.2 PPM Details
        3. 8.3.6.3 Implementing PPM in a System With Two Charging Ports (CDP and SDP1)
      7. 8.3.7  Overcurrent Protection
      8. 8.3.8  Undervoltage Lockout
      9. 8.3.9  Thermal Sensing
      10. 8.3.10 Current-Limit Setting
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device Truth Table (TT)
      2. 8.4.2 USB BC1.2 Specification Overview
      3. 8.4.3 Standard Downstream Port (SDP) Mode — USB 2.0 and USB 3.0
      4. 8.4.4 Charging Downstream Port (CDP) Mode
      5. 8.4.5 Client Mode
      6. 8.4.6 High-Bandwidth Data-Line Switch
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Input Capacitance
        2. 9.2.2.2 Output Capacitance
        3. 9.2.2.3 BIAS Capacitance
        4. 9.2.2.4 Output and BIAS TVS
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

TPS254900-Q1 Automotive USB Host Charger With Short-to-VBATT Protection

1 Features

  • 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
  • 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 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

TPS254900-Q1 pg1-simp-schem_SLUSCO9.gif

4 Revision History

Changes from * Revision (September 2016) to A Revision

  • Changed data sheet from PRODUCT PREVIEW to PRODUCTION DATAGo

5 Pin Configuration and Functions

RVC Package
20-Pin WQFN
Top View

Pin Functions

PIN TYPE(1) DESCRIPTION
NAME NO.
BIAS 12 PWR Used for IEC protection. Typically, connect a 2.2-µF capacitor and a transient-voltage suppressor (TVS) to ground and 5.1 kΩ to OUT.
CS 6 O Linear cable compensation current. Connect to divider resistor of front-end dc-dc converter.
CTL1 8 I Logic-level control input for controlling the charging mode and the signal switches; see the Device Truth Table (TT).
CTL2 9 I Logic-level control input for controlling the charging mode and the signal switches; see the Device Truth Table (TT).
DM_IN 14 I/O D– data line to downstream connector
DM_OUT 4 I/O D– data line to upstream USB host controller
DP_IN 13 I/O D+ data line to downstream connector
DP_OUT 5 I/O D+ data line to upstream USB host controller
EN 7 I Logic-level control input for turning the power and signal switches on or off. When EN is low, the device is disabled, and the signal and power switches are OFF.
FAULT 18 O Active-low, open-drain output, asserted during overtemperature, overcurrent, and overvoltage conditions.
GND 11 — Ground connection; should be connected externally to the thermal pad.
ILIM_HI 20 I External resistor used to set the high current-limit threshold.
ILIM_LO 19 I External resistor used to set the low current-limit threshold and the load-detection current threshold.
IMON 1 O This pin sources a scaled-down ratio of current through the internal FET. A resistor from this pin to GND converts current to proportional voltage; used as an analog current monitor.
IN 2,3 PWR Input supply voltage; connect a 0.1-µF or greater ceramic capacitor from IN to GND as close to the IC as possible.
OUT 15,16 PWR Power-switch output
OVP_SEL 10 I Logic-level control input for choosing the OUT overvoltage threshold. When OVP_SEL is low, V(OV_OUT_LOW) is active. When OVP_SEL is high, V(OV_OUT_HIGH) is active.
STATUS 17 O Active-low open-drain output, asserted in load-detect conditions
Thermal pad — — Thermal pad on the bottom of the package
(1) I = Input, O = Output, I/O = Input and output, PWR = Power

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale