• [ CXAC85192 ]"

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1.产品概述       2.产品特点     qfK嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）qfK嘉泰姆

5.产品封装       6.电路原理图  qfK嘉泰姆

7.相关产品qfK嘉泰姆

   产品概述 返回TOPqfK嘉泰姆

        CXAC85192是一种高性能的电流型PWM控制芯片，对低功耗开关设备进行了优化。为了降低的待机功率和更高的符合RoHS，IC提供了一个间歇振荡模式控制特性、超低启动电流和工作电流，即在无负载或轻负荷情况下，CXAC85192可以线性降低开关频率，使开关电源损耗最小; 在无负载或轻载情况下，CXAC85192可以线性降低开关频率，使开关电源损耗最小;超低启动电流和工作电流为启动设计提供了可靠的电源，也可以在启动电路中使用大电阻来提高开关效率。内部的同步斜波补偿电路降低了高PWM工作周期输出可能的二次谐波振荡。在电流检测(CS)输入端上的前沿消隐，消除了由于阻尼二极管电路反向恢复而产生的信号干扰，从而大大降低了设计中的外部元件计数和系统成本。

CXAC85192提供了自动恢复功能的全面保护范围，包括周期循环过流保护(OCP)、过载保护(OLP)、VCC箝位、低电压锁定(UVLO)、OTP和OVP关闭锁。为了保护内部的MOSFET Gate驱动的输出被箝位在12V。优良的EMI特性是在图腾柱门驱动输出中实现抖频技术和软开关控制。在设计中尽量减少低于20KHZ的音频能量，并在工作过程中消除音频噪声。CXAC85192是线性电源或RCC类型电源的理想替代品，可以更好地实现整个开关电源系统的性能和较低的成本。CXAC85192采用SOT23-6封装。qfK嘉泰姆

CXAC85192 is a high performance current mode PWM controller, optimized for low power power switch equipment. For lower the standby power and higher RoHS compliant, the IC offers a Burst Mode control feature and ultra-low start-up current and operating current, that is, at the condition of no load or light load, CXAC85192 can reduce the switch frequency linearly which minimize the switching power loss; the ultra-low startup current and operating current make a reliable power for startup design, and also large resistor can be used in the startup circuit to improve switching efficiency. The internal synchronous slope compensation circuit reduces the possible subharmonic oscillation at high PWM duty cycle output. Leading-edge blanking on current sense(CS) input removes the signal glitch due to snubber diode circuit reverse recovery and thus greatly reduces the external component count and system cost in the design. CXAC85192 offers comprehensive protection coverage with automatic self-recovery feature, including cycle by cycle over current protection (OCP), over load protection (OLP),VCC Clamp, under voltage lockout (UVLO), OTP and OVP shut down latch. The gate-driven output is clamped to maximum 12V to protect the internal MOSFET. Excellent EMI performance is achieved by using the soft-switching and frequency jittering at the totem-pole-gate-drive output. The tone energy at below 20KHZ is minimized in the design and audio noise is eliminat- ed during operation. The CXAC85192is the ideal substitute of the linear power supply or the RCC-mod e power, for a better performance of the whole switch power system and a lower cost. CXAC85192is available in SOT23-6 package.qfK嘉泰姆

   产品特点 返回TOPqfK嘉泰姆

间歇式控制；qfK嘉泰姆

5uA超低启动电流；qfK嘉泰姆

1.8mA低工作电流；qfK嘉泰姆

内置前沿消隐；qfK嘉泰姆

内置同步斜波补偿电路；qfK嘉泰姆

内置软启动；qfK嘉泰姆

65KHz固定开关频率；qfK嘉泰姆

周期循环的过流保护（OCP）；qfK嘉泰姆

VCC过压箝位和低电压锁定；qfK嘉泰姆

过载保护；qfK嘉泰姆

OTP和OVP关闭锁；qfK嘉泰姆

最大Gate门限输出电压箝位在12V；qfK嘉泰姆

抖频技术；qfK嘉泰姆

OVP通过外部的稳压二极管调节；qfK嘉泰姆

采用SOT23-6封装。qfK嘉泰姆

◆ Burst Mode ControlqfK嘉泰姆

◆ 5uA ultra-low startup currentqfK嘉泰姆

◆ 1.8mA Low operating currentqfK嘉泰姆

◆ Built-in Leading-edge blankingqfK嘉泰姆

◆ Built-in synchronous slope compensation circuitqfK嘉泰姆

◆ Built-in Soft-StartqfK嘉泰姆

◆ 65kHz fixed swith frequencyqfK嘉泰姆

◆ Cycle by cycle over current protection (OCP)qfK嘉泰姆

◆ VCC over voltage clamp & under voltage lockout( UVLO)qfK嘉泰姆

◆ Over load protection (OLP)qfK嘉泰姆

◆ OTP and OVP shut down latchqfK嘉泰姆

◆ Maximum Gate output voltage clamped at 12VqfK嘉泰姆

◆ Frequency jitteringqfK嘉泰姆

◆ Adjustable OVP through external ZenerqfK嘉泰姆

   应用范围 返回TOPqfK嘉泰姆

Universal switch power supply equipment and offline AC/DC flyback power converter Power Adapter qfK嘉泰姆

◆ Set-Top Box Power Supplies qfK嘉泰姆

◆ Open-frame SMPS qfK嘉泰姆

◆ Battery ChargerqfK嘉泰姆

   技术规格书（产品PDF) 返回TOP qfK嘉泰姆

     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！qfK嘉泰姆

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产品封装图 返回TOPqfK嘉泰姆

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电路原理图 返回TOPqfK嘉泰姆

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