AX3071
AX3071 is Wide Input Range CC/CV Step Down Controller manufactured by AXElite.
Wide Input Range CC/CV Step Down Controller
GENERAL DESCRIPTION The AX3071 is a step down PWM controller with a driving dual output current to 4.8A. It is designed to allow for operating a wide supply voltage range from 8V to 40V. The external shutdown function can be controlled by logic level to pull P/EN pin down, and then es into standby mode. The external pensation makes feedback control have good line and load regulation with flexible external design. The AX307 operates in the CC(Constant output Current) mode or CV(Constant output Voltage) mode, and the OCP current value is set by current sensing resisters. The AX3071 is suitable for the DC/DC switching power applications when requested the current limit function. The devices are available in MSOP-10L packages and require very few external devices for operation. Features
VIN Operate with 8V ~ 40V Supply Voltage VOUT Accuracy (VREF =1.0V) ±2.0% Over Line Voltage Dual-Channeling CC/CV Mode Control Cable pensation External Current Limit Setting Output Over Voltage Protection (~120%) Over Temperature Protection Internal Soft Start ~ 5ms Fixed Frequency 120KHz UVLO Protection (min=7V, typ=7.5V, max=8V) Duty Cycle Range (0~90%) Single Pin to External pensation and Shutdown Control COUT MLCC support. Built in Adjustable Line-pensation MSOP-10L Package
APPLICATION Car Charger Portable Charger Devices High-Brightness Lighting General-Purpose DC/DC Controller with Current Limit
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Axelite Confidential Materials, do not copy or distribute without written consent. Rev0.2 May.14, 2014
BLOCK DIAGRAM
Over Temperature Protection OVP Internal Regulator 5V FB 0.36V 5V POR VIN
+
1.18V
+ 0.4V UVP Fault Logics
+ +
Cable P Gate Control
VREF
+
ERROR AMPLIFIER
LX ramp LG
SEN1 0.6V
Current Sensor1
SEN2 0.6V
Current Sensor2
Oscillator 600KHz
Zero Current Detection GND
PIN ASSIGNMENT The package of AX3071 is MSOP-10L the pin assignment is given by:
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