引用: maychang 发表于 2016-8-18 11:48
由此我们可以更进一步推断:将R4b改成一支电容,第二幅图电路是可以启动的。因电容在电源上电时要流过充电 ...

受教了
点赞  2016-8-18 22:17
SD6271 输出电压5V,1A 恒流升压IC ,欢迎前来咨询:13510122397 陈'S  型号:SD6271 升压IC 牌子:SHOUDING 首鼎   封装:SOT23-6                主要性能:恒流模式的PWM升压IC                适用于锂电池(3~4.2V)输出5V1A的移动电源应用, 工作频率为1MHZ可以搭配3.3uh小型贴片电感,减少成品体积,内置过温保护,关断保护,欠压保护,过流保护,并可以外接电阻调整最大电流值(0.5~2.5A)      The SD6271 is available in the SOT23-6L paThe SD6271 is a current mode boost DC-DC convSD62711MHz 2A Step-Up Current Mode PWM Converter1/9General Descriptionerter. Its PWM circuitry with built-in 0.25Ωpower MOSFET make this regulator highly power efficient. The internal compensation network alsominimizes as much as 6 external component counts. The non-inverting input of error amplifier connectsto a 0.6V precision reference voltage and internal soft-start function can reduce the inrush current.ckage and provides space-saving PCB for the application fields.
点赞  2016-8-20 16:00
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