CXAC85174通过光耦回馈自动调节恒压输出通过辅助线圈检测自动调节恒流输出的AC-DC控制器PWM和PFM模式自动切换调节DCM模式下的波谷检测减少开关损耗

CXAC85174是一个通过光耦回馈实现自动调节恒压输出，并且通过辅助线圈检测实现自动调节恒流输出的AC-DC控制器。CXAC85174通过HV引脚控制耗尽型NFET实现快速启动并降低静态功耗，并通过DCM模式下的波谷检测减少开关损耗。采用PWM和PFM模式自动切换调节，且最高频率为100KHz，最低频率为170Hz，实现高的转换效率及小于30mW静态功耗。CXAC85174内置了热关断、过流、输出过压及输入过压保护功能，同时可通过NTC引脚检测环境温度进行过温保护
•<30mW的空载功耗
•±1%的恒压±5%恒流调整精度
•输出驱动电压钳位
•170Hz～100KHz开关频率
•适用小尺寸外部元件
•光耦反馈调节恒压和源边反馈调节恒流
•有源器件启动使启动速度更快
•SOT23-6和SOP-8 封装
•符合RoHS规范及Pb-Free

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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      CXAC85174是一个通过光耦回馈实现自动调节恒压输出，并且通过辅助线圈检测实现自动调节恒流输出的AC-DC控制器。CXAC85174通过HV引脚控制耗尽型NFET实现快速启动并降低静态功耗，并通过DCM模式下的波谷检测减少开关损耗。采用PWM和PFM模式自动切换调节，且最高频率为100KHz，最低频率为170Hz，实现高的转换效率及小于30mW静态功耗。CXAC85174内置了热关断、过流、输出过压及输入过压保护功能，同时可通过NTC引脚检测环境温度进行过温保护。The CXAC85174 is a high performance AC-DC power supply controller which provides constant output voltage (CV) using the Secondary Side Regulation (SSR) and accomplishes constant output current (CC) through Primary-side Regulation (PSR) techniques. The device together with an external depletion mode NFET provides a fast start-up time without consuming extra power dissipation in no-load. The drive output interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley-switching effectively reduces switching losses. The controller operates in pulse width modulation mode (PWM) or pulse frequency modulation mode (PFM) automatically to keep the conversion high efficiency within the line ranges and contains thermal shutdown function, over-voltage protection and over-current protection. A wide switching frequency range from 170Hz to 100kHz can achieve both less than 30mW no-load power dissipation and high average active efficiency

   产品特点 返回TOP

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•<30mW的空载功耗

•±1%的恒压±5%恒流调整精度

•输出驱动电压钳位

•170Hz～100KHz开关频率

•适用小尺寸外部元件

•光耦反馈调节恒压和源边反馈调节恒流

•有源器件启动使启动速度更快

•SOT23-6和SOP-8 封装

•符合RoHS规范及Pb-Free

<30mW No-Load Power.

±1% Voltage Regulation and ±5% Current

Regulation

Clamped Gate-Driver Output for MOSFET

170Hz ~ 100kHz Switching Frequency

Tiny External Components

Opto-Coupler Feedback of CV and Primary

Side Regulation(PSR) for CC

Active Start-up Scheme Enables Fastest

Possible Start-up.

Available in SOT23-6 and SOP-8 Packages

RoHS Compliant and 100% Lead (Pb)-Free

Halogen-Free

   应用范围 返回TOP

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•消费类电子产品适配器

•AC-DC电源
Adapters for Consumer Electronics
AC/DC Power

   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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AC/DC电源管理
Part   Number	remark	Topology	Control  Method	Frequency  (max)(kHz)	UVLO  Thresholds  On/Off (V)	Controller /Driver	Package
CXAC85170	Synchronous Rectifier Controller	SSR	Volt-second  Balance	150	3.8/3.5	Controller	SOT23-6
CXAC85171	Synchronous Rectifier Controller	SSR	Volt-second  Balance	150	3.8/3.5	Controller	SOT23-6
CXAC85172	Synchronous Rectifier Controller	PSR	Volt-second  Balance	150	3.8/3.5	Controller	SOT23-6
CXAC85173	Constant-Voltage, Constant-Current Controller with Primary-Side   Regulation	PSR	current	100	22/7.8	Controller	SOT23-6
CXAC85174	Constant-Voltage, Constant-Current Controller	SSR	current	100	22/6.5	Controller	SOT23-6;SOP-8