ACT4523
40 V, 3.0 A Sensorless CC/CV Step-Down DC/DC Converter
Please use ACT4752 for new designs
End of Life announced October 9, 2020 (PCN 20-0153).
Last Time Buy: April 24, 2021
Contact your local sales representative for assistance.
Key Features
- 40 V input voltage surge
- 38 V steady state operation
- Up to 3 A output current
- Output voltage up to 12 V
- Patent pending Active CC sensorless constant current control
- Resistor programmable
- +/- 7.5% CC Accuracy
- 2% feedback voltage accuracy
- Up to 94% efficiency
- 225 kHz switching frequency eases EMI design
- Advanced feature set
Qorvo's ACT4523 is a wide input voltage, high efficiency Active CC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4523 provides up to 3 A output current at 225 kHz switching frequency.
Active CC is a patent-pending control scheme to achieve highest accuracy sensorless constant current control. Active CC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and adaptors with accurate current limit
The product achieves higher efficiency than traditional constant current switching regulators by eliminating its associated power loss. Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
ACT4523 is available in a SOP-8EP package and requires very few external components for operation.
Typical Applications
- Car Chargers / Adapters
- Rechargeable Portable Devices
- General Purpose CC/CV Power Supplies
Product Categories
Application Categories
| Topology | Step-Down |
| Input Voltage(V) | 10 to 40 |
| Max Output Current(A) | 3.0 |
| Frequency(kHz) | 225 |
| ActiveCharge™ with Qualcomm QC 2.0 | No |
| AEC-Q100 | No |
| Cable Compensation | Yes |
| Sensorless CC Control | Yes |
| Package Type | SOP-8EP |
| RoHS | Yes |
| Lead Free | Yes |
| Halogen Free | Yes |
| ITAR Restricted | No |
| ECCN | EAR99 |