Data Sheet Rev. G, November 2023 | Subject to change without notice

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ACT4529

40 V/3.0 A CV/CC Buck Converter Featuring QC2.0, USB Auto-Detect and USB-PD

®

FUNCTIONAL DESCRIPTION

Cord Compensation

In some applications, the output voltage is increased

with output current to compensate the potential

voltage drop across output cable. The compensation is

based on the high side feedback resistance.

The compensation voltage is derived as:

ΔVOUT = (VCSP - VCSN)*K

Where K = 3.03

This voltage difference could be added on the reference

or turning the (VCSP - VCSN) voltage into a sink current at

FB pin to pull VOUT higher than programmed voltage.

The cord compensation loop should be very slow to

avoid potential disturbance to the voltage loop. The

voltage loop should be sufficiently stable on various

cord compensation setting.