MCP73844T-820I/MS

Product Overview

Category

The MCP73844T-820I/MS belongs to the category of battery charger ICs.

Use

This product is primarily used for charging lithium-ion (Li-Ion) or lithium-polymer (Li-Po) batteries.

Characteristics

• The MCP73844T-820I/MS is a highly integrated, single-cell, Li-Ion/Li-Po charge management controller.
• It offers a complete solution for developing and implementing smart and efficient battery chargers.
• This IC provides various safety features such as thermal regulation, overvoltage protection, and reverse discharge protection.
• It supports multiple charging modes, including constant current (CC), constant voltage (CV), and trickle charge.
• The MCP73844T-820I/MS is designed to work with a wide range of input sources, including USB ports and AC adapters.
• It has a high charging efficiency and can deliver up to 1.5A of charging current.

Package

The MCP73844T-820I/MS is available in a small MSOP-10 package.

Essence

The essence of this product lies in its ability to provide a reliable and efficient charging solution for Li-Ion/Li-Po batteries.

Packaging/Quantity

The MCP73844T-820I/MS is typically sold in reels containing 250 units.

Specifications

• Input Voltage Range: 4.35V - 6V
• Charging Current Range: Up to 1.5A
• Precharge Current: 100mA
• Charge Termination Threshold: 4.2V ± 1%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MCP73844T-820I/MS has the following pin configuration:

1. VBAT - Battery Voltage Input
2. PROG - Charge Current Programming Pin
3. STAT - Status Output Pin
4. PG - Power Good Output Pin
5. TS - Thermal Shutdown Input Pin
6. EN - Enable Input Pin
7. VSS - Ground
8. VDD - Supply Voltage Input
9. CE - Charge Enable Input
10. DP/DM - USB Data Pins

Functional Features

• Constant Current (CC) Mode: The MCP73844T-820I/MS provides a regulated charging current during the CC mode, ensuring a controlled and safe charging process.
• Constant Voltage (CV) Mode: Once the battery voltage reaches the charge termination threshold, the IC switches to CV mode, maintaining a constant voltage to prevent overcharging.
• Trickle Charge Mode: This feature allows for a low charging current to be applied when the battery voltage is below a certain threshold, ensuring the battery remains charged even in standby situations.
• Thermal Regulation: The IC incorporates thermal regulation to protect the battery and charger from overheating by reducing the charging current if the temperature exceeds a specified limit.
• Overvoltage Protection: The MCP73844T-820I/MS includes built-in protection against overvoltage conditions, safeguarding the battery from potential damage.
• Reverse Discharge Protection: It prevents the battery from discharging back into the charger when the input power source is removed.

Advantages and Disadvantages

Advantages

• Highly integrated solution for Li-Ion/Li-Po battery charging.
• Supports multiple charging modes for optimal performance.
• Wide input voltage range allows for versatile use with various power sources.
• Provides safety features such as thermal regulation and overvoltage protection.
• Small package size enables space-efficient designs.

Disadvantages

• Limited to single-cell battery charging applications.
• May require additional external components for specific system requirements.

Working Principles

The MCP73844T-820I/MS operates by regulating the charging current and voltage applied to the connected Li-Ion/Li-Po battery. It continuously monitors the battery voltage and adjusts the charging mode accordingly. During the CC mode, a constant current is supplied to the battery until it reaches the charge termination threshold. At this point, the IC switches to CV mode, maintaining a constant voltage to prevent overcharging. The charger also incorporates various safety features to protect the battery and charger from potential risks.

Detailed Application Field Plans

The MCP73844T-820I/MS finds applications in various portable electronic devices that utilize Li-Ion/Li-Po batteries. Some common application fields include:

1. Smartphones and Tablets: The IC can be used in mobile devices to provide efficient and safe charging for their built-in batteries.
2. Portable Power Banks: It enables the development of compact and reliable power banks for charging smartphones, tablets, and other portable devices on the go.
3. Wearable Devices: The MCP73844T-820I/MS can be integrated into wearable devices such as smartwatches and fitness trackers to