40V/3.5A CV/CC Buck Converter
ACT4525
Rev 1.1, December 17th, 2015
40V/3.5A CV/CC Buck Converter with USB Auto –Detect
FEATURES
Pass Apple MFi Tes...
Description
ACT4525
Rev 1.1, December 17th, 2015
40V/3.5A CV/CC Buck Converter with USB Auto –Detect
FEATURES
Pass Apple MFi Test 40V Input Voltage Surge 4.5V-36V Operational Input Voltage Dual 5.1V Outputs with 1% Accuracy Up to 3.5A Output Current 2.65A Constant Current Regulation for VOUT1 1.2A Constant Current Regulation for VOUT2 USB Auto-detect Support Apple 2.4A, Samsung
and BC1.2 Devices
Hiccup Mode Protection at Output Short 90% Efficiency at Full Load 0.5mA Low Standby Input Current 5.7V Output Over Voltage Protection Cord Voltage Drop Compensation Meet EN55022 Class B Radiated EMI Standard 8kV ESD HBM Protection on DP and DM SOP-8EP Package
APPLICATIONS
Car Charger Cigarette Lighter Adaptor (CLA)
Rechargeable Portable Device CV/CC regulation DC/DC converter
GENERAL DESCRIPTION
ACT4525 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. ACT4525 has separated output current limits for dual port CLA applications. With the separated current limits, the CLA can meet Apple’s MFi standard. ACT4525 provides up to 3.5A output current at 125kHz switching frequency. ACT4525 builds in USB autodetect algorithms to recognize Apple, Samsung, and BC1.2 devices to ensure maximum charge current to attached devices. ACT4525 utilize adaptive drive technique to achieve good EMI performance while main 90% efficiency at full load for mini size CLA ...
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