CXAC8544二次控制电路提供精确的恒压恒流（CV/CC）调节环路补偿电路保持稳定性紧凑型CV调节性能脉冲频率调制PFM方法建立不连续导通模式DCM反激电源

CXAC8544是一款用于电池充电器和适配器应用的高性能AC/DC电源控制器。该装置采用脉冲频率调制（PFM）方法建立不连续导通模式（DCM）反激电源。CXAC8544在移除光耦和二次控制电路的同时提供精确的恒压、恒流（CV/CC）调节。它还消除了环路补偿电路的需要，同时保持了稳定性。CXAC8544具有良好的调节性能和较高的平均效率，同时满足了30mW以下的空载功耗要求。
设置700V高压电源开关管及少量外围元件。
矩形恒流恒压输出的一次侧控制
亚微安启动电流
30mW空载输入功率可行
紧凑型CV调节性能
消除光耦和二次CV/CC控制电路
消除控制回路补偿电路
DCM操作中的反激拓扑
降低软启动系统EMI的随机调频
开放反馈保护
短路保护

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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The CXAC8544 is a high performance AC/DC power supply controller for battery charger and adapter applications. The device uses Pulse Frequency Modulation(PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. The CXAC8544 provides accurate constant voltage, constant current (CV/CC) regulation while removing the opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The CXAC8544 achieves excellent regulation and high average efficiency, yet meets the requirement for no-load consumption less than 30mW.

   产品特点 返回TOP

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Set-in high-voltage power switch tube of 700V and few peripheral components.

 
Primary Side Control for Rectangular Constant Current and Constant Voltage Output

 
Sub-microampere Start-up Current
30mW No-load Input Power Feasible

 
Tight CV Regulation Performance

 
Eliminates Opto-coupler and Secondary CV/CC Control Circuitry
Eliminates Control Loop Compensation Circuitry

 
Flyback Topology in DCM Operation

 
Random Frequency Modulation to Reduce System EMI
Built-in Soft Start

 
Open Feedback Protection

 
Short Circuit Protection

 
SOP8 Package

   应用范围 返回TOP

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Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus

 
LED Drivers

 
Standby and Auxiliary Power Supplies

   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 Converter（AC/DC转换器）>>>原边控制芯片系列)
Part Number	Power	Standby	MODE	Freq	Accu	Cable	OTP/	Package
	(80-265V)	(mW)	(Flyback)	(KHz)	CC/CV	Compen-sation	OVP
CXAC8541	10W	≤300	PFM	65	5%/5%	Y	-/Y	SOP8
CXAC8542	12W	≤30	PFM	65	5%/3%	Y	Y/Y	SOP8
CXAC8543	10W	≤100	PFM	65	7%/5%	-	Y/-	SOT23-6
CXAC8544	5W	≤100	PFM	65	7%/5%	-	Y/-	SOP8
CXAC8545	12W	≤30	PFM	65	5%/5%	Y	-/Y	SOT23-6
CXAC8546	10W	≤30	PFM	65	5%/5%	Y	-/Y	SOP8
CXAC8547	18W	≤30	PFM	65	5%/5%	Y	Y/Y	SOT23-6
CXAC8548	15W	≤100	PFM	65	5%/5%	Y	Y/Y	DIP-8
CXAC8549	4W	≤30	PFM	65	5%/5%	Y	-/Y	SOP8
CXAC8550	30W	≤100	PFM/PWM	65	3%/-	-	Y/Y	SOP8
CXAC8551	10W	≤30	PFM	65	5%/5%	Y	-/Y	SOP8
CXAC8552	18W	≤80	QR	120	5%/3%	Y	Y/Y	SOT23-6
CXAC8553	5W	≤80	QR	120	5%/3%	Y	Y/Y	SOP7
CXAC8554	10W	≤80	QR	120	5%/3%	Y	Y/Y	DIP7
CXAC8555	10W	≤80	QR	120	5%/3%	Y	Y/Y	SOP7