Automotive USB Charger with Integrated Linear Droop Compensation Reference Design
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Key Document


The PMP4471 reference design provides detailed data for evaluating and verifying a USB charger, which uses a USB charge controller and a buck converter .  The design is capable of compensating for the effects on Vdroop when a smartphone / tablet is connected to the USB charger using a cable that is roughly 2-3 meters in length. Compliance wtih almost all major smartphone / tablet manufacturers is supported due to programmable current limit up to 2.1 A, BC 1.2 compliant devices are supported as well as D+/D- divider modes of 2.7V/2.7V and 1.2V.

  • Integrate linear cable compensation solution
  • The TI devices in this design are AEC-Q100 qualified
  • Supports CDP/SDP auto switch for small industry standard footprint based devices
  • Size: 95mm(L)X28.5mm(W)x12mm(H)
  • High efficiency with 90.7%@19Vin full load

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Design Files

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(Output Voltage 1)
Vin (Min) (V)7
Vin (Max) (V)42
Vout (Nom) (V)5
Iout (Max) (A)2.1
Output Power (W)10.5
Input TypeDC
TopologyBuck- Non Sync

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPD2E001  Low-capacitance 2-channel +/-15k-V ESD protection array for high-speed data interfaces  Circuit protection ICs  Sample & Buy View Design Kits & Evaluation Modules
TPS2549-Q1  Automotive USB Charge port controller with droop compensation  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS54340-Q1  Automotive 4.5V-42VIN, 3.5A, Step-Down Converter with Eco-mode™  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPD2E001 Download -
Download Download
Download -
Download Download
TPS2549-Q1 Download Download
TPS54340-Q1 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 300 04 Jan 2016
Design files (3)
Title Type Size (KB) Date
ZIP 170 04 Jan 2016
PDF 43 04 Jan 2016
PDF 32 04 Jan 2016

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