MCP73834T-NVI/UN

Series:	--
Packaging:	Tape & Reel (TR)
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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PMIC - Battery Chargers

The MCP73834T-NVI/UN is a low-power battery charging IC that is developed by Microchip Technology. The MCP73834T-NVI/UN is a single-cell charge controller that is designed to fast-charge, monitor and maintain a wide variety of rechargeable Li-Ion and Lithium-Polymer battery chemistries. This IC enables system designers to rapidly add battery charging capability to their portable devices.It is an ideal solution for portable applications that require fast charging, excellent accuracy, superior thermal performance, and extensive component integration to reduce board space and component count. This device includes integrated current sense, voltage regulation, charge and charge status monitoring, and an automatic failure detection and recovery. The MCP73834T-NVI/UN is suitable for adapting to changing input voltages, making it ideally suited for applications in a wide variety of portable devices, from cell phones to tablets.

Overview

The MCP73834T-NVI/UN is designed to provide fast and accurate charge and charge status monitoring for single-cell Li-Ion, and Lithium-Polymer cells. It offers an integrated, 4.2V regulated output with charge currents selectable up to 1A. The MCP73834T-NVI/UN also offers programmable charge current and an automatic termination charge. It also has an integrated, precision current-sense amplifier to accurately measure the charge current. The device further complements these features with low-voltage input and output thermal shutdown, as well as a programmable safety timer. The device features a wide operating voltage range from 2.7V to 5.5V. This makes it suitable for usage in a variety of battery chemistries. It is able to accurately terminate the charge cycle, with a programmable charge current threshold of 750 mA, without the need for external components. An internal control loop maintains an optimal charge cycle temperature, enabling greater battery charge retention and longer battery life.

Application Fields

The MCP73834T-NVI/UN is suited for a variety of applications in portable devices. Its versatility makes it suitable for a wide array of consumer products, such as smartphones, tablets, personal audio players, desktop PCs, and remote access products, among others. The device can be used in any application where fast, energy efficient battery charging, monitoring, and maintenance is required. The MCP73834T-NVI/UN is also designed to be efficient and minimize thermal dissipation. It is also designed to minimize power losses while charging, which leads to greater efficiency and less heat generation. This makes it suitable for applications that require maximum energy efficiency.

Working Principle

The central working principle of the MCP73834T-NVI/UN is its ability to accurately terminate the charge cycle without the need for external components. This is achieved with an internal voltage-source charging control loop and precision current-sense amplifier. The current-sense amplifier is used to accurately measure the amount of current being supplied to the battery. This information is used to control the charge cycle and provide precise charge termination. The device also features a programmable safety timer, which is used to ensure that the battery is not overcharged. If a charge cycle runs longer than the predetermined time limit, the MCP73834T-NVI/UN will terminate the charge cycle. The device also includes an integrated low-voltage input and output thermal shutdown function, which prevents heat-related damage to the battery and IC. The MCP73834T-NVI/UN is designed to monitor the battery voltage and current throughout the charge cycle to ensure safe and efficient charging of the battery. The charge rate can also be programmed, allowing for flexibility in the design of the system. The device can also be programmed to enable trickle charging, which is used for the maintenance of a fully-charged battery.

Conclusion

The MCP73834T-NVI/UN is a versatile and advanced battery charging IC, designed to provide fast, efficient charging of a wide variety of Li-Ion and Lithium-Polymer batteries. Its integrated current-sense amplifier, voltage regulation, and other advanced features enable the device to accurately measure and terminate the charge cycle with impressive accuracy. This charge controller has an operating voltage range of 2.7V to 5.5V, making it suitable for use in a variety of applications, from smartphones to tablets. The device is designed to minimize power losses and heat dissipation, allowing for greater efficiency and longer battery life.

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