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Copyright © 2016-2017 Active-Semi, Inc.

FEATURES

Automotive Qualified

and UL.

 UL Certificate No. 4787083099-1

 http://www.qualcomm.com/documents/quickc

harge-device-list

Protection for 5.1V/9.1V/12.1V Outputs

APPLICATIONS

GENERAL DESCRIPTION

ACT4529 is a wide input voltage, high efficiency

step-down DC/DC converter that operates in either

CV (Constant Output Voltage) mode or CC

(Constant Output Current) mode. This device has

QC2.0 built in to provide 5.1V/9.1V/12.1V outputs

as requested by attached portable devices. Besides

building in QC2.0 decoding, it also supports Apple,

Samsung and BC1.2 devices to charge at full

current rate. ACT4529 has an interface for USB-PD

control via a tri-state digital pin. Vout is 5.1V if this

pin is floating, Vout is 9.1V when this pin voltage is

less than 0.8V and Vout is 12.1V while this pin

voltage is more than 2.0V.

ACT4529 has accurate output current limits under

constant current regulation. It provides up to 3.0A

output current at 125kHz switching frequency.

ACT4529 utilizes adaptive drive technique to

achieve good EMI performance while main >90%

efficiency at full load for mini size CLA designs. It

also has output short circuit protection with hiccup

mode. The average output current is reduced to

below 6mA when output is shorted to ground. Other

features include output over voltage protection and

thermal shutdown.

This device is available in a SOP-8EP package and

requires

very

few

external

components

for

operation.

For details on SAE J1752 M8A EMC performance

and testing, refer to Active-Semi application note

AN-106, ACT4529M Automotive EMC Performance.

ACT4529M

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

Rev 1, 23-Feb-17

Typical Application Circuit

V/I Profile

* Patent Pending