CXAC8504高性能电流型PWM控制器是专为高性能高性价比的交直流变压器设计的在85V～265V的宽电压提供18W连续输出功率高性能调制锁模脉冲宽度反馈补偿功能

CXAC8504高性能电流型PWM控制器是专为高性能、高性价比的交直流变压器设计的，在85V～265V的宽电压范围内提供12W的连续输出功率，峰值输出功率可达18W高性能、高性价比的双极制备技术最终节约了整个成本。该功率控制器可应用于典型的反激电路拓扑，从而构成一个简单的交直流变换器。IC内部的启动电路设计成一种特殊的电流吸入方式，可以利用电源开关管本身的放大功能启动，大大降低了启动电阻的功耗；当输出功率较低时，IC会自动降低工作频率，因此待机功耗变得极低。当电源管关闭时，内部电路会反向偏压，直接利用双极晶体管高压电阻CB的特性，将其耐压能力提高到700V，保证了电源管的安全性。同时，集成电路内部还具有完善的过载和饱和保护功能，可以有效地防止过载、变压器饱和、输出短路等异常状态，提高电源的可靠性。电流限制和时钟频率可由外部组件设置。现提供符合欧洲DIP8标准的标准封装和环保无铅封装。
●设700V高压电源开关管及少量外围元件。
●通过调制锁模脉冲宽度，根据脉冲限流进行测试。
●具有输出频率降低功能，非输出功耗小于0.1W
●内置坡道和反反馈补偿功能
●独立的上限电流测试控制器实时处理控制器的过流和过载。
●关闭周期发射极，通过偏转电压输出，提高了电源管的耐压性能。●设置带温度补偿的限流电阻，使限流精确
●设置在热保护电路中
●启动采用开关电源管放大功能，启动电阻功耗降低10倍以上。
●低启动和运行电流
●VCC过电压自动限制
●连续宽电压输出功率12W，峰值输出功率18W。

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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CXAC8504 PWM controller of high-performance current mode is specially designed for AC/DC transformer with high performance and price ratio, which supplies continuous output power of 12W within the range of wide-voltage between 85V and 265V, the output power of peak value can be up to 18W. The combination of optimized reasonable circuit design and bipolar facture technology with high performance and price ratio economizes the whole cost ultimately. The power controller can be applied to the typical flyback circuit topology so as to form a simple AC/DC transformer. The startup circuit inside IC is designed as a particular current inhalation way, so it can start up with the magnification function of the power switch tube itself, which lessens the power consumption for starting the resistance remarkably; when the output power is lower, IC will reduce the working frequency automatically, therefore, the standby power consumption becomes extremely low. When the power tube is closed, the interior circuit will bias it reversely, utilize the characteristic of high pressure resistance CB of bipolar transistor directly, and improve its pressure resistance capacity to the high voltage of 700V, which ensures the security of the power tube. Meanwhile, the perfect function of overload and saturation prevention is provided inside of IC, which can keep away some abnormal status, such as overload, saturation of transformer, and output short circuit, so as to improve the reliability of the power supply. The current limit and clock frequency can be set up by exterior components. Now the standard encapsulation and the environmental protection leadless encapsulation that meets European standard of DIP8 are supplied.

   产品特点 返回TOP

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

●With the modulation of lock pulse width, the testing is according to the pulse limit current. 

●With the function of output frequency reduction, the non-output power consumption can be less than 0.1W 

●Inner-built ramp and anti-feedback compensation function 

●The independent upper-limit current testing controller deals with over-current and over-load of the controller real-timely. 

●The period emission pole is turned off and it outputs by deflected voltage, and the pressure resistance of the power tube is improved. ●Set-in current limit resistance with temperature compensation, which makes the current limit precise 

●Set-in heat protection circuit 

●Startup is accomplished with the magnification function of the switch power tube, and the power consumption of startup resistance is reduced more than10 times. 

●Low startup and operating current 

●VCC over-voltage automatic limit 

●Continuous wide-voltage output power reaches 12W, and the output power of peak value arrives at 18W.

   应用范围 返回TOP

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●Adaptor (for example, travel charger, out power station) 

●Open Frame (for example, DVD, DVB)

   技术规格书（产品PDF) 返回TOP 

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     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

产品封装图 返回TOP

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电路原理图 返回TOP

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Small& Medium Power Controller (中小功率控制芯片)
Part Number	Power	Power	Standby	MODE	Freq	Accu	OTP/	Package
	(80-265V)	(175-265V)	(mW)	(Flyback)	(KHz)		OVP
CXAC8501	10W	12W	≤300	PFM	65	±1%	-/ Y	TO92
CXAC8502	15W	18W	≤200	PWM	45-80 ADJ	±1%	Y/ Y	DIP8
CXAC8503	15W	18W	≤150	PWM	45-80 ADJ	±1%	-/ Y	DIP8
CXAC8504	12W	18W	≤150	PWM	45-80/ADJ	±1%	Y/ Y	DIP8
CXAC8505	5W	7W	≤150	PWM	45-80/ADJ	±5%	Y/ Y	SOP8/ESOP8
CXAC8506A	15W	18W	≤100	PWM	65	±1%	-/ Y	DIP8
CXAC8506B	15W	18W	≤100	PWM	65	±1%	-/ Y	DIP8
CXAC8506C	15W	18W	≤100	PWM	65	±1%	-/ Y	DIP8
CXAC8507A/B	15W	18W	≤100	PWM	65	±1%	Y/ Y	DIP8
CXAC8508	15W	18W	≤100	PWM	65	±1%	Y/ Y	DIP8
CXAC8508B	15W	18W	≤100	PWM	65	±1%	Y/ Y	DIP8
CXAC8509	18W	24W	≤100	PWM	65	±1%	Y/ Y	DIP8
CXAC8510	12W	18W	≤100	PWM	60	±1%	Y/ Y	DIP8
CXAC8511	12W	18W	≤100	PWM	60	±1%	Y/ Y	DIP8
CXAC8512	18W	24W	≤100	PWM	65	±1%	Y/ Y	DIP8
CXAC8556	15W	18W	≤100	QR	90	±1%	Y/ Y	DIP7
CXAC8557	12W	18W	≤100	PWM	60	±1%	Y/ Y	DIP8