MIC79050-4.2BS

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The MIC79050-4.2BS is a multi-channel linear voltage battery charger manufactured by Microchip Technology Inc. It is specifically designed for Li-ion battery packs with a maximum charging voltage of 4.2V and a maximum charging current of 1.2A. This product is made using small Ceramic or MLCC components and is suitable for small form factor charging solutions. It is also suitable for applications which require temperature compensation or auto-recharge.

Application Field

The MIC79050-4.2BS is designed to operate as a stand-alone, cost-effective battery charger for small form factor Li-ion battery applications. It is suitable for battery packs for mobile phones, tablets, handheld devices, personal digital assistants (PDAs), wearable electronics and many other devices. It is also ideal for applications that require temperature compensation or auto-recharge.

Working Principle

The MIC79050-4.2BS consists of two main components, a Linear Charge Circuit and an Automatic Trickle Charge Circuit. The Linear Charge Circuit is responsible for the main charging of the battery pack, while the Automatic Trickle Charge Circuit helps to maintain a full charge on the battery pack. The Linear Charge Circuit works by using a switching regulator to provide a constant output voltage. This output voltage is then applied to the battery pack, charging it at a constant current. The Automatic Trickle Charge Circuit works by using a comparator to sense the battery pack\'s voltage. If the battery pack\'s voltage drops below a predetermined level, the comparator sends a signal to the main charging circuit, which then supplies a small current to maintain the battery pack\'s full charge.

The MIC79050-4.2BS also has additional features, such as temperature sensor, current and voltage measurement and an over-discharge protection circuit. The temperature sensor helps to monitor the temperature of the battery pack, preventing the charger from overcharging the battery and damaging it. The current and voltage measurement allow for more accurate and reliable charging. The over-discharge protection circuit prevents the battery pack from being over-discharged and damaged.

Conclusion

In conclusion, the MIC79050-4.2BS is a multi-channel linear voltage battery charger designed for small form factor Li-ion battery applications. It is made using small Ceramic or MLCC components, and is suitable for applications which require temperature compensation or auto-recharge. It has features such as a switching regulator, temperature sensor, current and voltage measurement and an over-discharge protection circuit. All these features make it a cost-effective and reliable charging solution.

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