ACT4523A
40 V, 3.5 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.
关键性能
- 40 V input voltage surge
- 36 V steady state operation
- Up to 3.5 A output current
- Output voltage up to 12 V
- 250 kHz switching frequency
- 91% efficiency (Vout = 5 V @ 3.5 A at Vin = 12 V)
- Patented Active CC sensorless constant current control
- Resistor programmable
- +/- 6.5% CC accuracy
- 2% feedback voltage accuracy
- Advanced feature set
Qorvo's ACT4523A 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. ACT4523A provides up to 3.5 A output current at 250 kHz switching frequency.
Active CC is a patented control scheme to achieve highest accuracy with 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 on the sensing resistor. ACT4523A provides an OVP pin for output over-voltage protection. Other protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
ACT4523A is available in a SOP-8EP package and requires very few external components for operation.
特别应用
- Car Chargers / Adapters
- Rechargeable Portable Devices
- General Purpose CC/CV Power Supplies
| 拓扑 | Step-Down |
| Min Input Voltage(V) | 10 |
| 最大输入电压(V) | 40 |
| 最大输出电流(A) | 3.5 |
| 频率(kHz) | 250 |
| 集成 Qualcomm QC 2.0 的 ActiveCharge™ | No |
| AEC-Q100 | No |
| 线损补偿 | Yes |
| 无传感器恒流控制 | Yes |
| 封装类型 | SOP-8EP |
| RoHS | Yes |
| Lead Free | Yes |
| Halogen Free | Yes |
| ITAR Restricted | No |
| ECCN | EAR99 |