|
2.5V至6V输入电压0.6ΩN沟道MOSFET内置软启动CXSU63140固定开关频率电流模式升压集成N沟道MOSFET的稳压器 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
目录 1.产品概述 2.产品特点 一,产品概述(General Description) The CXSU63140 is a fixed switching frequency (1MHz typical), current-mode, step-up 1.)Wide 2.5V to 6V Input Voltage Range Cell Phone and Smart Phone 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！ 五,产品封装图 (Package)
六.电路原理图
七,功能概述 Main Control Loop the internal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch, and then turned off when an internal comparator (ICMP) resets the latch. The peak inductor current at which ICMP resets the RS latch is controlled by the voltage on the COMP node which is the output of the error amplifier (EAMP). An external resis-tive divider connected between VOUT and ground allows the EAMP to receive an output feedback voltage VFB at FB pin. When the load current increases, it causes a slightly to decrease in VFB associated with the 1.23V reference,which in turn, it causes the COMP voltage to increase until the average inductor current matches the new load current. to ensure the input voltage is high enough for reliable operation.The 100mV (typ) hysteresis prevents supply transients from causing a restart. Once the input voltage exceeds the UVLO rising threshold, startup begins. When the in-put voltage falls below the UVLO falling threshold, the controller turns off the converter. soft-start, an internal ramp voltage, connected to the one of the positive inputs of the error amplifier, raises up to replace the reference voltage (1.23V typical) until the ramp voltage reaches the reference voltage. limits the current peak at current-limit level to prevent loads and the CXSU63140 from damaging during overload or short-circuit conditions. the junction temperature ex-ceeds 150 oC, a thermal sensor turns off the power MOSFET allowing the devices to cool. The thermal sen-sor allows the converters to start a soft-start process and regulates the output voltage again after the junction tem-perature cools by 40oC. The OTP is designed with a 40oC hysteresis to lower the average Junction Temperature the internal power MOSFET turns off, all internal circuitry shuts down, andthe quiescent supply current reduces to 1μA maximum.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2.5V至6V输入电压0.6ΩN沟道MOSFET内置软启动CXSU63140固定开关频率电流模式升压集成N沟道MOSFET的稳压器
发表时间：2020-06-08浏览次数：58
