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ACT4525 Datasheet(PDF) 1 Page - Active-Semi, Inc |
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ACT4525 Datasheet(HTML) 1 Page - Active-Semi, Inc |
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1 / 11 page  Innovative PowerTM - 1 - www.active-semi.com Copyright © 2015 Active-Semi, Inc. ACT4525 40V/3.5A CV/CC Buck Converter with USB Auto –Detect Rev 1.1, December 17th, 2015 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 auto- detect 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 designs. ACT4525 also built in 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. The devices are available in a SOP-8EP package and require very few external devices for operation. 2.4A 2.9A 5.25V 4.95V 5.10V Vout1 Iout1 3.20V Typical Application Circuit ACT4525 HSB IN SW 4.5V to 40V DM Rcs1 25mΩ CSP DP Vout GND D- D+ GND CSN1 5.1V/2.4A C2 10μF C3 22nF C5 470μF C1 47μF C4 10μF C6 2.2μF D1 SK54L L1 33μH Vout GND D- D+ 5.1V/1A CSN2 Rcs2 50mΩ C7 2.2μF * Patent Pending V/I Profile 1.1A 1.3A 5.25V 4.95V 5.10V Vout2 Iout2 3.20V |
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