输入是cr2032纽扣电池,升压后输出3.3V,负载工作10~15mA左右,待机10~20uA。
升压芯片TLV61225,
不带负载时升压电路有正常输出,加上负载时一上电纽扣电池就被拉低到0.5V了.
用电脑串口板的电压作为输入供电时也没有问题,用纽扣电池来供电就带不动负载。
直接用外部3V给升压电路供电没有问题,
去掉升压电路,直接用CR2032电池给负载供电也没有问题。
但通过CR2032电池给升压电路供电再带负载就不行
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tps610981比较贵,请问有没有便宜点的的适合coin battery 升压到2.7或3V的推荐,感谢。