MCP73833T-FCI/UN

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MCP73833T-FCI/UN Application Field and Working Principle

The MCP73833T-FCI/UN is a Power Management Integrated Circuit (PMIC) used as a general purpose Battery Charger. It is a one-cell lithium ion fuel gauge, specifically designed for use in battery powered applications. It is integrated with multiple charging and safety features to maximize the battery safety, efficiency, and reliability. The MCP73833T-FCI/UN is intended for use as a Constant Voltage/Current, Fully Charged status monitoring charge controller for one-cell Lithium-Ion and Lithium-Ion Polymer battery packs.

Features of MCP73833T-FCI/UN

• Wide Operating Range: 4.5V to 28V
• Input Voltage Range: 4.5V to 28V
• Programmable Charge Current: 0.1A to 2A
• Charge Status Output: ACTIVE/FULL/DISABLE
• Over Discharge Protection: 37mV (typical) @ battery
• Reverse Current Block Protection
• Size: 2.0 x 2.75 x 0.55 mm 10-pin DFN

Working Principle

The MCP73833T-FCI/UN allows the user to select charging current as well as the charging voltage. This is done by adjusting external resistor values used from the tables provided by MCP. An internal oscillator generates the switching pulses for the high-side MOSFET in the charging circuit. With an adjustable AC Voltage Converter, the input current can be reduced for a given charging current. When the battery charging is completed, or an overvoltage condition is met, the charge current is reduced to reduce battery stress and temperature. As a safety feature, an over-temperature shutdown circuit is also featured.

The MCP73833T-FCI/UN is designed for the system that requires multiple battery charging channels. It is designed for the system that requires both charging and discharging in the same channel. Its low cost and small form factor make it ideal for low powered, portable applications.

Application Field

MCP73833T-FCI/UN has varied application fields such as portable consumer products (cellular phones, PDAs, digital cameras, music players, etc.), healthcare applications, automotive applications, home appliances and much more. MCP73833T-FCI/UN is suitable for any system that needs efficient and reliable charging of Li-Ion batteries.

It is ideal for applications where multiple battery charging channels are required, or where charging and discharging are performed in the same channel. It is also suitable for designs that need to charge and discharge several Li-Ion batteries at the same time. The low cost and small form factor make this IC suitable for low-power and portable applications such as medical devices, consumer devices, and other point of use devices.

Conclusion

The MCP73833T-FCI/UN is an ideal PMIC for applications requiring multiple battery charging channels and for applications requiring simultaneous charging and discharging, due to its low cost and small form factor. It is designed with several safety features to maximize battery safety and reliability. The wide operating range and adjustable charge current make it suitable for a wide variety of applications.

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