A7431
DC-DC CONVERTER BUCK (STEP-DOWN)
42V 3A CC/CV
AiT Semiconductor Inc.
www.ait-ic.com
DESCRIPTION
FEATURES
A7431 is a wide input voltage, high efficiency
CC/CV step-down DC-DC converter that operates
in either CV (Constant Output Voltage) mode or CC
(Constant Output Current) mode. A7431 provides
up to 3A output current at 125kHz switching
frequency.
A7431 eliminates the expensive, high accuracy
current sense resistor, making it ideal for battery
charging applications and adaptors with accurate
current limit. The A7431 achieves higher efficiency
than traditional constant current switching
regulators by eliminating its associated power loss
on the additional current sensing resistor. A7431
provides OVP pin for output over voltage protection.
A7431 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.
42V Input Voltage Surge
36V Steady State Operation
Up to 3A Output Current
Output Voltage up to 12V
125kHz Switching Frequency
Up to 91% Efficiency
Stable with Low-ESR Ceramic Capacitors to
Allow Low-Profile Designs
Integrated Over Voltage Protection
Excellent EMI Performance
Constant Current Control Without Additional
Current Sensing Resistor Improves Efficiency
and Lowers Cost.
Resistor Programmable Current Limit from 1.5A
to 3.5A
Up to 0.5V Excellent Cable Voltage Drop
Compensation
±7.5% CC Accuracy
2% Feedback Voltage Accuracy
Advanced Feature Set
Integrated Soft Start
Thermal Shutdown
Protection features include cycle-by-cycle current
limit, thermal shutdown, and frequency foldback at
short circuit. A7431 are available in a PSOP8
package and require very few external devices for
operation.
Cycle-by-Cycle Current Limit
Available in PSOP8 Package
APPLICATION
The A7431 is available in PSOP8 package.
Car Charger/ Adaptor
Rechargeable Portable Devices
General-Purpose CC/CV Supply
ORDERING INFORMATION
Package Type
Part Number
A7431MP8R
A7431MP8VR
TYPICAL APPLICATION
PSOP8
MP8
SPQ: 4,000pcs/Reel
V: Halogen free Package
R: Tape & Reel
Note
AiT provides all RoHS products
REV1.1
- JAN 2016 RELEASED, SEP 2016 UPDATED -
- 1 -
AITSEMI [ AiT Semiconductor ]
