特点：
n高耐压：输入电压可达 40V；
n大电流输出：输出电流可达 5A↑ (2.5A+2.5A)
nOCP环路：精度±5%
n 完整保护措施：短路、过压、过热等完备的保护措施，保护后端用电设备的安全以及系统本身的可靠性
nDuty Cycle 0 至 90%设置
n 内置Soft Start Function,保护后端设备免受 Overshoot 的冲击.
n 外置双 N 型 Mosfet 功率开关,采用同步架构
n外部OCP可设定, 并提供共两组的各别设定
n 频率固定为120Khz,以利EMI之通过.
n Line(Cable) Compensation 线路压降补偿可经由客户端自行设定(0V to 0.5V)
n 高可靠性，AX3071 在保障自身安全稳定工作的同时，还充分考虑了由于生产因素、异常使用因素、特殊环境因素等引起的一系列特殊情况下对后端用电设备的保护，是真正的高可靠性解决方案。
n输出发生短路后，系统进入打嗝工作模式，不断检测异常状态是否解除，有效避免持续发热。
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 COMP/EN pin down, and then comes into standby mode. The external compensation makes feedback control have good line and load regulation with flexible external design.
The AX3071 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 Compensation
- 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 Compensation and Shutdown Control
- COUT MLCC support.
- Built in Adjustable Line-Compensation
- MSOP-10L Package
APPLICATION
- Car Charger
- Portable Charger Devices
- High-Brightness Lighting
- General-Purpose DC/DC Controller with Current Limit
双USB(2.4A*2)车充PCB:
