产品概述 返回TOPTW2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。</span>TW2嘉泰姆
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。</span>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。</span>TW2嘉泰姆
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</span>(OCP)、过载保护</span>(OLP)、</span>VCC箝位、低电压锁定(UVLO)、</span>OTP和</span>OVP关闭锁。为了保护内部的MOSFET Gate驱动的输出被箝位在</span>12V。</span>优良的</span>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。</span>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。</span>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。</span>CXAC85192采用SOT23-6封装。</span>TW2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.TW2嘉泰姆
产品特点 返回TOPTW2嘉泰姆
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间歇式控制；TW2嘉泰姆
5uA超低启动电流；</span>TW2嘉泰姆
1.8mA低工作电流；TW2嘉泰姆
内置前沿消隐；</span>TW2嘉泰姆
内置同步斜波补偿电路；</span>TW2嘉泰姆
内置软启动；TW2嘉泰姆
65KHz固定开关频率；TW2嘉泰姆
周期循环的过流保护（OCP）；TW2嘉泰姆
VCC过压箝位和低电压锁定；</span>TW2嘉泰姆
过载保护；</span>TW2嘉泰姆
OTP和OVP关闭锁；TW2嘉泰姆
最大Gate门限输出电压箝位在12V；</span>TW2嘉泰姆
抖频技术；TW2嘉泰姆
OVP通过外部的稳压二极管调节；</span>TW2嘉泰姆
采用SOT23-6封装。</span>TW2嘉泰姆
◆ Burst Mode ControlTW2嘉泰姆
◆ 5uA ultra-low startup currentTW2嘉泰姆
◆ 1.8mA Low operating currentTW2嘉泰姆
◆ Built-in Leading-edge blankingTW2嘉泰姆
◆ Built-in synchronous slope compensation
circuitTW2嘉泰姆
◆ Built-in Soft-StartTW2嘉泰姆
◆ 65kHz fixed swith frequencyTW2嘉泰姆
◆ Cycle by cycle over current protection (OCP)TW2嘉泰姆
◆ VCC over voltage clamp & under voltage
lockout( UVLO)TW2嘉泰姆
◆ Over load protection (OLP)TW2嘉泰姆
◆ OTP and OVP shut down latchTW2嘉泰姆
◆ Maximum Gate output voltage clamped at 12VTW2嘉泰姆
◆ Frequency jitteringTW2嘉泰姆
◆ Adjustable OVP through external ZenerTW2嘉泰姆
应用范围 返回TOPTW2嘉泰姆
Universal switch power supply equipment and
offline AC/DC flyback power converter Power
Adapter TW2嘉泰姆
◆ Set-Top Box Power Supplies TW2嘉泰姆
◆ Open-frame SMPS TW2嘉泰姆
◆ Battery ChargerTW2嘉泰姆
技术规格书（产品PDF) 返回TOP TW2嘉泰姆
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