Dual USB Car Charger Reference Design with Port Power Management
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Key Document


The PMP11670 reference design is a dual channel USB charger for automotive application. It includes a high performance buck converter which provides total 3.5A load current for both channels. The Port Power Management feature of port controllers improves the thermal performance by limiting the max load current for each channel. Both ports support the USB BC1.2 CDP and DCP charging protocols. The built-in IEC protection helps to enhance the system's reliability while the low standby current extends the battery's life.

  • Short-to-VBUS protection on DP_IN and DM_IN
  • IEC ESD protection on DP_IN/DM_IN
  • USB BC1.2 CDP, DCP charging protocols supported
  • High integration converter and protection
  • Port power management (PPM) with 3.5A total current
  • Low standby power consumption

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Schematic/Block Diagram

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Design Guide

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)6.56.5
Vin (Max) (V)3636
Vout (Nom) (V)55
Iout (Max) (A)2.41.1
Output Power (W)125.5
Input TypeDCDC
TopologyBuck- SynchronousBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM73605  3.5V to 36V, 5A Synchronous Step-Down Voltage Converter  Step-down (buck) regulators  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

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM73605 Download Download
TPS2549-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 960 26 May 2016
Design files (6)
Title Type Size (KB) Date
ZIP 306 26 May 2016
ZIP 596 26 May 2016
PDF 728 26 May 2016
PDF 89 26 May 2016
PDF 176 26 May 2016
PDF 304 26 May 2016

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