ACT4523A

40 V, 3.5 A Sensorless CC/CV Step-Down DC/DC Converter

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.

Discontinued
i

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.

Product Data SheetRev A – 01/2020
Buy OnlineRequest a SampleContact Sales
Buy OnlineRequest a SampleContact Sales

Key Features

  • 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

Typical Applications

  • Car Chargers / Adapters
  • Rechargeable Portable Devices
  • General Purpose CC/CV Power Supplies

Parameters

Topology
Step-Down
Min Input Voltage (V)
10
Max Input Voltage (V)
40
Max Output Current (A)
3.5
Frequency (kHz)
250
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

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