TPS254900A-Q1 Automotive USB Host Charger With Short-to-VBATT Protection | TI.com

TPS254900A-Q1 (ACTIVE)

Automotive USB Host Charger With Short-to-VBATT Protection

 

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-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 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.

Features

  • 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

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Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) Approx. price (US$) Continuous current (Max) (A) Current limit (A) Current limit topology Enable Number of switches Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Rating
TPS254900A-Q1 Order now 4.5     6.5     1.53 | 1ku     3.2     0.25 to 3.6       Active High     1     -40 to 85     WQFN | 20     20WQFN: 12 mm2: 4 x 3 (WQFN | 20)     Automotive    
TPS2549-Q1 Order now 4.5     6.5     1.05 | 1ku     3.2     0.25 to 3.6     Constant-Current
Thermal Shutdown    
Active High     1     -40 to 85     WQFN | 16     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     Automotive    
TPS254900-Q1 Order now 4.5     6.5     1.40 | 1ku     3     0.25 to 3.4     Constant-Current
Thermal Shutdown    
Active High     1     -40 to 85     WQFN | 20     20WQFN: 12 mm2: 4 x 3 (WQFN | 20)     Automotive