ACT4527
40 V, 3.0 A CC/CV Step-Down DC/DC Converter with USB-PD
Qorvo's ACT4527 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.
ACT4527 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 9.1 V when this pin's voltage is less than 0.8 V and Vout is 12.1 V when this pin's voltage is more than 2.0 V.
The product has accurate output current limits under constant current regulation. It provides up to 3.0 A output current at 125 kHz switching frequency. ACT4527 utilizes an adaptive drive technique to achieve good EMI performance while maintaining greater than 90% efficiency at full load for mini-size CLA designs. ACT4527 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.
ACT4527 is available in a SOP-8EP package and requires very few external components for operation.
Key Features
- USB-PD support
- Passes USB-IF certification: Test ID 1010060
- 40 V input voltage surge
- 4.5 to 36 V operational input voltage
- 5.1 / 9.1 / 12.1 V output with +/- 1% accuracy
- Up to 3.0 A output current
- Constant current regulation limit
- Hiccup mode protection at output short
- > 90% efficiency at full load
- 0.5 mA low standby input current
- 5.1 / 9.1 / 12.1 V Output over-voltage protection
- Cord voltage compensation
- Meets EN55022 Class B radiated EMI standard
Typical Applications
- Car Chargers
- Cigarette Lighter Adapters (CLAs)
- Rechargeable Portable Devices
- CV/CC Regulation DC/DC Converters
Parameters
Technical Documents
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