锂电常用的充电ic，经典中的经典
JZ4054引脚图：
JZ4054应用电路：
Description
JZ4054 is a complete constant-current & constant voltage linear charger for single cell lithium-ion and Lithium-Polymer batteries. Its SOT-23 package and low external component count make JZ4054 ideally suited for portable applications.
Furthermore, the JZ4054 is specifically designed to work within USB power specification. At the same time, JZ4054 can also be used in the standalone lithium-ion and Lithium-polymer battery charger.
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4054 充电.pdf
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