MCP73833-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:	MCP73833

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MCP73833-NVI/UN Application Field and Working Principle

The MCP73833-NVI/UN is a fully autonomous linear charge management controller for use with Lithium-Ion Single-Cell battery packs. At the core of the device is an on-board microcontroller that operates the charge state algorithm, allowing the device to perform autonomous self-regulation in order to maintain the battery pack at an optimum charge state while protecting the battery from over charge and over discharge conditions. The device also supports a wide range of system-level information to the host.

Application Field

MCP73833-NVI/UN as part of a PMIC-Battery Chargers solution is well suited for various applications that include portable devices such as cell phones, portable music players, digital cameras, and smaller notebooks. This highly integrated power management solution features a 3.2 MHz Constant Frequency, High Efficiency DC/DC converter and an integrated power path to optimize system performance and maximize efficiency. With the ability to dynamically adjust charge rates based on system load and temperature conditions as well as monitoring the state of the battery, the MCP73833-NVI/UN provides a reliable one-stop charging solution for applications where robust, long-term product life and safety are key concerns.

Working Principle

The MCP73833-NVI/UN functions as the system-on-chip solution for a single-cell Lithium-Ion battery charge management system. The device\'s integrated microcontroller allows for autonomous self-regulation. This allows the device to maintain the battery pack at an optimal charge state while continuously monitoring it to protect it against overcharge and over discharge conditions.The device also supports a wide range of system-level information to the host, allowing for direct communication between the host and the charger and a better understanding of the system configuration. The charger is designed to run on a wide range of input voltages, up to 8.4V, to allow for flexibility in system design.The MCP73833-NVI/UN uses a three-stage charging algorithm for improved longevity and better battery life. The initial stage of the process is for precharging the battery. This process includes shunting and trickle charging. During this stage, the device carefully monitors the battery voltage, current flows and other parameters to ensure maximum charging efficiency.The second stage of charging is maintains the steady-state charge. During this stage, the microcontroller keeps the battery at the appropriate voltage for the long-term and is adaptable to load requirements and temperature conditions. Once the battery is fully charged, the device will move to a maintenance stage, where it will apply a small trickle charge that maintains the battery levels without the risk of damage or over charging the battery.Overall, the MCP73833-NVI/UN provides an intuitive and reliable solution for managing the charge of a single-cell Lithium-Ion battery pack. The device comes with several built-in protective features and allows for much greater control and flexibility when it comes to battery charging and monitoring. The integrated microcontroller and communication interface provide an intuitive and reliable solution that can help improve system performance, productivity, and safety.

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