ACT4529M

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

Data Sheet Rev. B, September 2020 | Subject to change without notice

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FEATURES

• AEC-Q100 Automotive Qualified

• -40 °C ~ 125 °C Junction Temperature Range Auto-

motive Qualified

• Passes SAE J1752 M8A EMC testing

• Quick Charge™ 2.0 Certified by Qualcomm

® and UL.

− UL Certificate No. 4787083099-1

− https://www.qualcomm.com/documents/quick-

charge-device-list

• 40 V Input Voltage Surge

• 4.5 V - 36 V Operational Input Voltage

• 5.1 V/9.1 V/12.1 V Output with +/-1% Accuracy

• Up to 3.0 A Output current

• Constant Current Regulation Limit

• QC2.0 + Auto-Detect + USB-PD Type-C Support

• Hiccup Mode Protection at Output Short

• >90% Efficiency at Full Load

• 0.5 mA Low Standby Input Current

• 5.7 V/10.1 V/13.5 V Output Over-voltage

Protection for 5.1 V/9.1 V/12.1 V Outputs

• Cord Voltage Compensation

• Meet EN55022 Class B Radiated EMI Standard

• 8 kV ESD HBM Protection on DP and DM

• SOP-8EP Package

APPLICATIONS

• Automotive Applications

• Car Charger

• Cigarette Lighter Adaptor (CLA)

• CV/CC regulation DC/DC converter

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 5.1 V/9.1 V/12.1 V 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 5.1 V if this pin is floating, VOUT is 9.1V when this

pin voltage is less than 0.8 V and VOUT is 12.1 V while

this pin voltage is more than 2.0 V.

ACT4529 has accurate output current limits under

constant current regulation. It provides up to 3.0 A

output current at 125 kHz 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 6 mA 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.

Typical Application Circuit

V/I Profile