4.0A输出电流输出电压12V高效率的降压型DC/DC变换器CXSD62343无传感器恒流控制效率高达95%

CXSD62343是一种宽输入电压、高效率的降压型DC/DC变换器，工作于CV（恒压）或CC（恒流）模式。该装置包括基准电压源、振荡电路、误差放大器、集成大功率mos、pwm控制器和恒流控制器。CXSD62343 CXSD62344在125 KHz开关频率下提供高达4.0A的输出电流。CC消除了昂贵的，高精度的电流感应电阻，使其成为电池充电应用和具有精确电流限制的适配器的理想选择。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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       CXSD62343 CXSD62344 is a wide input voltage, high efficiency step-down DC/DC converter which operates in either CV (Constant Voltage) mode or CC (Constant Current) mode. This device includes a reference voltage source, oscillation circuit, error amplifier, integrated high-side power mos, a pwm controller and a constant current controller. CXSD62343 CXSD62344 provides up to 4.0A output current at 125 KHz switching frequency. CC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and adaptors with accurate current limit. CXSD62343 CXSD62344achieves higher efficiency than traditional constant current switching regulators by eliminating its associated power loss. Standard protection features include cycle by cycle current limit, thermal shutdown, and frequency fold-back at short circuit. The devices are available in a SOP-8EP package and require few external devices for operation.

   产品特点 返回TOP

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40V Input Voltage Surge 

32V Steady State Operation 

4.0A output current 

Output Voltage up to 12V 

125kHz Switching Frequency Eases EMI Design 

Sensor-less Constant Current Control 

Resistor Programmable 

− Current Limit from 1.0A to 4.0A 

− Cable Compensation 

±5.0% CC Accuracy 

±2.5% Feedback Voltage Accuracy 

Up to 95% Efficiency 

Extra Features 

− Integrated Soft Start 

− Thermal Shutdown 

− Cycle-by-Cycle Current Limit 

− ISET Short Protection 

SOP-8EP Package

   应用范围 返回TOP

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Car Charger/ Adaptor 

Rechargeable Portable Devices 

General-Purpose CC/CV Supply

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

 

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电源管理IC系列
型号	输入电压	输出电压	最大输 出电流	封装	说明
CXSD62342	4.5to5.5V	2.7V 2V		SOT23-6	USB Dedicated Charging Port   Controller USB专用充电端口控 制器双端口输出
CXSD62343	40V	12V	4.0A	SOP-8EP	125 KHz 4.0A/40V CC/CV   Step-Down DC/DC Converter
CXSD62344	40V	12V	3.5A	SOP-8	125 KHz 3.5A/40V CC/CV   Step-Down DC/DC Converter
CXSD62345	40V	12V	1.5A	SOP-8	125 KHz 2.5A/40V CC/CV   Step-Down DC/DC Converter
CXSD62346	40V	12V	1.5	SOP-8	125KHz 1.5A/40V CC/CV Step-Down   DC/DC Converter