toothache

Reference design for automotive USB charger with line drop compensation

TIDA-00160

Overview

The design converts an 8V-42V DC input into a 5.1V output and is protected by the TPS2546-Q1 programmable current protection switch. Its handshake protocol enables fast charging of smartphones/tablets/handheld devices. By detecting the load current and adjusting the DC/DC output voltage, this design can implement linear USB cable differential compensation function to keep the USB port voltage within a limited range. This design is suitable for devices such as vehicle-mounted hosts and remote USB hubs.

characteristic

● Comply with AEC-Q100 automotive certification
● Able to achieve constant 5.1V output from the USB port under 0A to 2.1A load conditions
● Can linearly compensate for 200 milliohm line loss under full load current (2-meter USB cable for automobiles)
● D+/D- splitter mode and BC 1.2 mode for 2.7V/2V, 2V/2.7V and 1.2V/1.2V output
● 10W car USB charger supports fast charging of most smartphones/tablets

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Blockdiagram

Design Files

Documentation

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Update:2025-06-24 06:30:11

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