LM3620M5-8 Integrated Circuits (ICs)

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The LM3620M5-8 is a power management integrated circuit (PMIC) designed to provide a wide range of charging functions for small coin cell lithium ion batteries. The device is part of the LM3620 family of general-purpose battery charging integrated circuits (ICs), which are designed to deal with different power management problems related to the charging and protection of small Lithium ion coin cell batteries. The LM3620M5-8 is specifically aimed at applications that need a low quiescent current with an operating voltage range of 3.1V to 6V, making it ideal for battery charging in portable applications such as cellular phones and other handheld devices.

The LM3620M5-8 has two independent channels for charging. The first is a high current charger (HC) which is capable of delivering up to 1A of charge current for charging single-cell lithium ion cells. The second is a low current charger (LC), which is capable of providing up to 30mA of charge current for charging two-cell lithium ion cells. Each channel includes a status output pin which can be used to detect when the battery has finished charging or when it has reached a voltage threshold. The HC channel also includes an additional status output pin which can be used to detect when the battery has entered a full-charge state. The device offers both CC/CV (Constant-Current/Constant-Voltage) and termination current (TC). Additionally, the device uses a “Charge Hold” mode which prevents the battery from overcharging.

The device has a number of protection features built into it which help ensure that the charge cycle is safe and efficient. These features include overvoltage protection, temperature monitoring and overcurrent protection. Additionally, the device includes an auto-timed charge cycle that allows for optimal charge efficiency. This auto-timed cycle can be programmed using two external resistors, allowing for further customization. Finally, the device offers several signaling options for monitoring battery status, allowing for easy integration into existing systems.

The LM3620M5-8 is an excellent choice for charging Li-ion cells in portable applications, such as cellphone and other electronic devices. Its wide operating range allows for use in a variety of applications, while its robust set of protection and monitoring features make it a safe and efficient choice for a general purpose battery charging IC. Additionally, its low quiescent current and its extended charge hold time make it an ideal candidate for modern energy harvesting applications.

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