MCP73831T IC Battery Single-Cell Li-Ion Management Controllers

Overview of MCP73831T

The MCP73831/2 devices are extremely sophisticated linear charge management controllers for usage in applications with limited space and high cost. The MCP73831/2 are offered in either a 5-Lead SOT-23 configuration or an 8-Lead, 2 mm x 3 mm DFN container. In addition to its tiny physical size, the MCP73831/2 are well suited for portable applications because to the low requirement for external components. The MCP73831/2 comply to all USB power bus criteria when used in applications that require USB port charging.

The charge algorithm used by the MCP73831/2 is constant-current/constantvoltage with configurable preconditioning and charge termination. To meet evolving battery charging needs, the constant voltage regulation is fixed with four options: 4.20V, 4.35V, 4.40V, or 4.50V. One external resistor is used to set the constant current value. The MCP73831/2 devices restrict the charging current at high power or hot ambient conditions based on die temperature. The charging cycle time is optimized by this heat management while device dependability is preserved.

The preconditioning threshold, preconditioning current value, charge termination value, and automatic recharging threshold all have a number of possibilities. Preconditioning and charge termination values are set as a ratio or portion of the constant current value that is programmed. Preconditioning may be turned off. For information on available options and the Product Identification System for standard options, see Section 1.0, "Electrical Characteristics." The MCP73831/2 devices have been completely tested in the -40°C to +85°C temperature range.

Video related to MCP73831T

Video Description: How to create electronic circuit diagram for USB charger circuit diagram using MCP 73831 IC (Charge Management Controllers) for single cell li-ion battery on simulation program? A circuit design for 500 mA USB charger circuit using 73831. How to make circuit schematic and how to make new component for circuit diagrams on proteus - isis simulation program.

MCP73831T Pinout

MCP73831T Pinout

MCP73831T CAD Model

MCP73831T Symbol

MCP73831T Footprint

MCP73831T Functional Block Diagram

MCP73831T Functional Block Diagram

MCP73831T Features

• Linear Charge Management Controller:

- Integrated Pass Transistor

- Integrated Current Sense

- Reverse Discharge Protection

• High-Accuracy Preset Voltage Regulation: + 0.75%
• Four Voltage Regulation Options:

- 4.20V, 4.35V, 4.40V, 4.50V

• Programmable Charge Current: 15 mA to 500 mA
• Selectable Preconditioning:

- 10%, 20%, 40%, or Disable

• Selectable End-of-Charge Control:

- 5%, 7.5%, 10%, or 20%

• Charge Status Output

- Tri-State Output - MCP73831

- Open-Drain Output - MCP73832

• Automatic Power-Down
• Thermal Regulation
• Temperature Range: -40°C to +85°C
• Packaging:

- 8-Lead, 2 mm x 3 mm DFN

- 5-Lead, SOT-23

MCP73831T Absolute Maximum Ratings

VDD:  7.0V

All Inputs and Outputs w.r.t. VSS: -0.3 to (VDD+0.3)V

Maximum Junction Temperature, TJ: Internally Limited

Storage temperature: -65°C to +150°C

ESD protection on all pins

Human Body Model (1.5kΩ in Series with 100pF): ≥ 4kV

Machine Model (200pF, No Series Resistance): 400V

MCP73831T Equivalents

TP5000

TP5100 module

TP4056

How To Use MCP73831?

The schematics below display an MCP73831's typical application diagram. It simply needs a very small amount of parts, including the current programming resistor, status led, and filter capacitors, as was already indicated.

By connecting a programming resistor between the PROG VSS pins, the charge current can be adjusted. The following equation is used to determine the program resistor and charge current:

where RPROG = kOhms and IREG = mA

MCP73831T Typical Applications

The MCP73831/2 are intended to work either as a stand-alone application or in conjunction with a host microcontroller. The preferred charging algorithm for lithium-ion and lithium-polymer cells is provided by the MCP73831/2. The algorithm employs a charging mechanism of constant voltage followed by constant current.

Typical Application Circuit

MCP73831T Applications

• Lithium-Ion/Lithium-Polymer Battery Chargers
• Personal Data Assistants
• Cellular Telephones
• Digital Cameras
• MP3 Players
• Bluetooth Headsets
• USB Chargers

MCP73831T Datasheet

MCP73831T Datasheet

MCP73831T packaging information

MCP73831T packaging information

MCP73831T FAQ

What is the MCP73831T?

The MCP73831/2 devices are extremely sophisticated linear charge management controllers for usage in applications with limited space and high cost. The MCP73831/2 are offered in either a 5-Lead SOT-23 configuration or an 8-Lead, 2 mm x 3 mm DFN container.

What can be the MCP73831T used for?

MCP73831T can be applied to a variety of applications such as Lithium-Ion/Lithium-Polymer Battery Chargers, Personal Data Assistants, Cellular Telephones, and so on.

What kinds of devices can be replaced by MCP73831T?

MCP73831T can be replaced by the TP5000, TP5100 module, and TP4056.

How to use the MCP73831T?

The schematics below show the usual application diagram for an MCP73831. As was already mentioned, it just requires a very minimal number of components, including the current programming resistor, status led, and filter capacitors. The charge current can be changed by inserting a programming resistor between the PROG VSS pins.

How many pins of this MCP73831T device?

5 pins.