MCP73834-NVI/UN

Series:	--
Packaging:	Tube
Part Status:	Active
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Current - Charging:	Constant - Programmable
Programmable Features:	Current
Fault Protection:	Over Temperature
Charge Current - Max:	1.1A
Battery Pack Voltage:	4.35V
Voltage - Supply (Max):	6V
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package:	10-MSOP
Base Part Number:	MCP73834

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Introduction to PMIC-Battery ChargersPMIC (power management integrated circuit) is a type of integrated circuit for battery charging and related activities. These devices typically combine multiple independent power supplies, charge controllers, sequencing and monitoring circuitry into a single package. PMIC battery chargers are used in applications that require power management and charging of portable devices, including mobile phones, laptops, tablets, and medical equipment.MCP73834-NVI/UN Application Field and Working PrincipleThe MCP73834-NVI/UN is a multifunctional, single-cell Li-Ion/Li-polymer charge management controller. The controller implements a constant-current/constant-voltage (CC/CV) algorithm designed to charge single-cell Li-Ion/Li-polymer batteries. It is designed using a small, low cost, low-power CMOS process.This MCP73834-NVI/UN device is a PMIC battery charger designed for use in portable and handheld applications. The device provides an adjustable, constant-current/constant-voltage charging profile to recharge the battery with minimum amount of board components and effort. The IC supports up to 7 µA in current-limited applications and includes an internal state machine to control the charging cycle.The MCP73834-NVI/UN includes an integrated charge controller, Battery Regulation Voltage (BRV) monitoring, and termination control for single-cell battery protection. The internal charge controller provides protection against overcharging and overvoltage. The device also includes internal thermal regulation and self-resonant flyback half-bridge operation for increased efficiency.The integrated charge controller ensures an optimum charging voltage of 4.2 V and a maximum charging current of 1A. When the battery is fully charged, the charge controller switches to a constant-voltage output and then reduces the charging current to 7 µA to maintain the battery at a fully charged condition. A user selectable Input Current Limitation (ICL) can be set up to 850 mA.The MCP73834-NVI/UN also provides a Battery Regulation Voltage (BRV) monitoring function to ensure the integrity of the battery. It checks the battery voltage and reports to the host via an interrupt line (INTx) when the battery voltage exceeds the upper and lower limits. If the battery voltage drops below the lower limit, the charge controller begins to charge the battery again.The MCP73834-NVI/UN also provides several protection features such as Short Circuit Protection (SCP) and Over Temperature Protection (OTP). These protection features protect the battery from high current and high temperature, respectively. The SCP monitors the batteries current and if the level exceeds the safe limit, the charge controller shuts down the charging cycle. The OTP monitors the battery temperature and if the temperature exceeds the safe limit, the charge controller shuts down the charging cycle.The MCP73834-NVI/UN is an ideal solution for battery charging and management in portable devices, including mobile phones, laptops, tablets, and medical equipment. It is able to reduce the number of components needed for power management, increase reliability, and reduce board space. With its wide range of features, the MCP73834-NVI/UN provides an optimal solution for battery management in portable and handheld applications.

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