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Numéro de référence | ACT4533C | ||
Description | Wide-Input Sensorless CC/CV Step-Down DC/DC Converter | ||
Fabricant | Active-Semi | ||
Logo | |||
1 Page
ACT4533C
Rev 1, 14-Nov-14
Wide-Input Sensorless CC/CV Step-Down DC/DC Converter
FEATURES
• 40V Input Voltage Surge
• 36V Steady State Operation
• Up to 3.5A output current
• Output Voltage up to 18V
• 125kHz Switching Frequency Eases EMI Design
• 91% Efficiency ([email protected] at Vin=12V)
• Stable with Low-ESR Ceramic Capacitors to
Allow Low-Profile Designs
• Integrated Over Voltage Protection
• Excellent EMI Performance
• Patented ActiveCC Sensorless Constant Current
Control Improves Efficiency and Lowers Cost.
• Resistor Programmable
− Current Limit from 1.5A to 4.0A
− Patented Cable Compensation from 0 to
0.25Ω
• ±7.5% CC Accuracy
− Compensation of Input /Output Voltage Change
− Temperature Compensation
− Independent of inductance and Inductor DCR
• 2% Feedback Voltage Accuracy
• Advanced Feature Set
− Integrated Soft Start
− Thermal Shutdown
− Secondary Cycle-by-Cycle Current Limit
− Protection Against Shorted ISET Pin
• SOP-8EP Package
APPLICATIONS
• Car Charger/ Adaptor
• Rechargeable Portable Devices
• General-Purpose CV/CC Power Supply
GENERAL DESCRIPTION
ACT4533C is a wide input voltage, high efficiency
ActiveCC step-down DC/DC converter that operates
in either CV (Constant Output Voltage) mode or CC
(Constant Output Current) mode. ACT4533C
provides up to 3.5A output current at 125kHz
switching frequency.
ActiveCC is a patented control scheme to achieve
high-accuracy sensorless constant current control.
ActiveCC eliminates the expensive, high accuracy
current sense resistor, making it ideal for CLA
applications.
ACT4533C integrates adaptive gate drive to
achieve excellent EMI performance passing
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 devices are available in a SOP-
8EP package and require very few external devices
for operation.
Innovative PowerTM
-1-
CC/CV Curve
6.0
VIN = 24V
5.0
VIN = 18V
4.0
3.0
VIN = 12V
2.0
1.0
0.0
1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
Output Current (A)
www.active-semi.com
Copyright © 2014 Active-Semi, Inc.
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Pages | Pages 16 | ||
Télécharger | [ ACT4533C ] |
No | Description détaillée | Fabricant |
ACT4533 | Wide-Input Sensorless CC/CV Step-Down DC/DC Converter | Active-Semi |
ACT4533A | Wide-Input Sensorless CC/CV Step-Down DC/DC Converter | Active-Semi |
ACT4533B | Wide-Input Sensorless CC/CV Step-Down DC/DC Converter | Active-Semi |
ACT4533C | Wide-Input Sensorless CC/CV Step-Down DC/DC Converter | Active-Semi |
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