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LP4076ESPF 是微源半导体(LOWPOWER)推出的一款单节锂离子电池充电管理芯片,封装为 ESOP-8。芯片支持典型的锂电池充电流程,最大充电电流为 1A,工作电压范围为 4.5V 至 6V,适合以 5V USB 或单节升压/稳压输入为电源的便携与嵌入式设备。
LP4076ESPF 通常在系统设计中采用 CC(恒流)→ CV(恒压)两阶段对单节锂电池充电:先以设定的恒流(不超过 1A)对电池充电,当电池电压接近 4.2V 后转为恒压模式并缓慢降低充电电流直至终止。由于芯片不支持 0V 唤醒充电,设计时需确保保护电路不会将电池放电至 0V,或在电池被过放后采用外部恢复电路。
建议在设计时注意:使用合适的电流检测电阻与滤波电容、在输入端加足够的去耦电容、防止输入瞬态导致芯片误动作;若并联 MOSFET 或外部功率器件,应考虑热耗散与 PCB 热路径设计。
在选型时,若系统要求对 0V 深放电电池有唤醒功能,需选用支持 0V 唤醒的充电芯片或增加外部恢复电路。若系统持续工作在高温或需长期 1A 充电,建议在 PCB 设计上给予芯片良好散热路径,并在布局中把输入电容、感测电阻尽量靠近芯片引脚以减少寄生与噪声。静态电流低是优势,但若产品对超低待机功耗有更苛刻要求,可综合比较更低 Iq 的方案。
总结:LP4076ESPF 是一款面向单节锂电池、支持电池温度检测、最大 1A 充电的充电管理芯片,适合多数便携与嵌入式应用。合理的外围电路与热管理设计能发挥其低功耗与稳定充电的优势。
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Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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