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ACT4533BYH-T

Model Number: ACT4533B

DC-DC Non-Sync Step Down Conve from Qorvo

40 V, 3.0 A Sensorless CC/CV Step-Down DC/DC Converter

Status: Standard | Data Sheet:

| RoHS Compliance: Rohs Compliant

Overview

Qorvo’s ACT4533B 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. ACT4533B provides up to 3.5 A output current at 125 kHz switching frequency.

Active CC is a patented control scheme to achieve high-accuracy sensorless constant current control. Active CC eliminates the expensive, high accuracy current sense resistor, making it ideal for Cigarette Lighter Adapter (CLA) applications.

ACT4533B integrates adaptive gate drive to achieve excellent EMI performance, passing the EN55022 Class B EMC standard without adding additional EMI components while maintaining high conversion efficiency.

Protection features include cycle-by-cycle current limit, thermal shutdown and frequency foldback at short circuit.

The only difference between ACT4533A and ACT4533B is that Pin 7 provides OVP for ACT4533A and EN/OVP for ACT4533B.

ACT4533B is available in a SOP-8EP package and require very few external components for operation.

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
125 kHz switching frequency eases EMI design
91% efficiency (Vout = 5V @ 2.4 A at Vin = 12 V)
Stable with low ESR ceramic capacitors to allow low-profile designs
Patent Active CC sensorless constant current control improves efficiency and lowers cost
Integrated over-voltage protection
Excellent EMI performance
+/- 7.5% CC accuracy
2% feedback voltage accuracy
Advanced feature set

Typical Applications

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

Part Number: ACT4533BYH-T
Manufacturer: Qorvo
Topology: Step-Down
Input Voltage: 10 - 40 V
Max Output Current: 3.5 A
Frequency: 125 kHz
Features: Cable Compensation, Sensorless CC Control
Package Type: SOP-8EP

Tariff Notice

Product may be included on Section 301 Tariff List and subject to applicable tariff charges.

Part Function	Part Number	Description
Evaluation Board	EA4533BYH Qorvo	ACT4533BEVK

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Product Specifications For ACT4533BYH-T DC-DC Non-Sync Step Down Converter

Part Number: ACT4533BYH-T Manufacturer: Qorvo Product Description: 40 V, 3.0 A Sensorless CC/CV Step-Down DC/DC Converter

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Product Notices

Tariff Notice

Product may be included on Section 301 Tariff List and subject to applicable tariff charges.

Description	Units Per Format	Available

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ACT4533BYH-T

DC-DC Non-Sync Step Down Conve from Qorvo

40 V, 3.0 A Sensorless CC/CV Step-Down DC/DC Converter

Technical Inquiry Request for ACT4533BYH-T DC-DC Non-Sync Step Down Converter

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ACT4533BYH-T

DC-DC Non-Sync Step Down Conve from Qorvo

40 V, 3.0 A Sensorless CC/CV Step-Down DC/DC Converter

Technical Inquiry Request for ACT4533BYH-T DC-DC Non-Sync Step Down Converter

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