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1. Describe
The MCP73832T-2ACI/OT device is a highly advanced linear Charge management controller for space-constrained, cost-sensitive applications. MCP73831/2 Available in 8-Lead, 2 mm x 3 mm DFN Package or 5-pin SOT-23 package. together with their little Physical size, low external component count needed to make the MCP73831/2 ideal for Portable application. For applications from a charging USB ports, the MCP73831/2 hold all The specification manages the USB power bus. MCP73831/2 adopts constant current/constant voltage charging algorithm, selectable Preconditioning and charge termination. constant Voltage regulation is fixed and there are four options available: 4.20V, 4.35V, 4.40V or 4.50V to suit new, Emerging battery charging requirements. constant The current value is set by an external resistor. This MCP73831/2 devices limit charge current based on Die temperature at high power or high ambient situation. This thermal regulation optimizes charge cycle time while maintaining device reliability. There are several options available for preprocessing Threshold, preprocessing current value, charging Termination value and auto-recharge threshold. Preprocessing Values and Charge Termination Value is set as a ratio or a percentage programmed constant current value. preprocessing Can be disabled.
2. Features
1. Linear Charge Management Controller:
- Integrated Pass Transistor
- Integrated Current Sense
- Reverse Discharge Protection
2. High Accuracy Preset Voltage Regulation: + 0.75%
3. Four Voltage Regulation Options:
- 4.20V, 4.35V, 4.40V, 4.50V
4. Programmable Charge Current: 15 mA to 500 mA
5. Selectable Preconditioning:
- 10%, 20%, 40%, or Disable
6. Selectable End-of-Charge Control:
- 5%, 7.5%, 10%, or 20%
7. Charge Status Output
- Tri-State Output - MCP73831
- Open-Drain Output - MCP73832
8. Automatic Power-Down
9. Thermal Regulation
10. Temperature Range: -40°C to +85°C
11. Packaging:
- 8-Lead, 2 mm x 3 mm DFN
- 5-Lead, SOT-23
3. Pin configuration
4. Applications
1. Lithium-Ion/Lithium-Polymer Battery Chargers
2. Personal Data Assistants
3. Cellular Telephones
4. Digital Cameras
5. MP3 Players
6. Bluetooth Headsets
7. USB Chargers
5. Pin Description
6. Application
The MCP73831/2 are designed to be used with a host microcontroller or to operate in a stand-alone application. The MCP73831/2 provide the preferred charging algorithm for Li-Ion and Li-Polymer batteries. The algorithm adopts the method of constant voltage charging after constant current.
