TPS254900A-Q1 Texas instruments

TPS254900A-Q1

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TPS254900A-Q1

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Описание

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.

Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- 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
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

Product type	Charge port controller
Vin (min) (V)	4.5
Vin (max) (V)	6.5
Continuous current (max) (A)	3.2
Current limit (A)	0.25 to 3.6
Operating temperature range (°C)	-40 to 85
Enable	Active High
Number of switches	1
Current limit accuracy at 1 A	0.1
Rating	Automotive