MCP73834T-B6I/UN

Product Overview

• Category: Battery Charger IC
• Use: Charging lithium-ion (Li-Ion) and lithium-polymer (Li-Po) batteries
• Characteristics:
  • Small form factor
  • High charging efficiency
  • Integrated safety features
  • Flexible input voltage range
• Package: SOT-23-5
• Essence: Efficient and compact battery charger IC
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 4.35V to 6V
• Charge Current: Up to 1A
• Preconditioning Current: 10% of the programmed charge current
• Termination Current: 10% of the programmed charge current
• Charge Voltage: Programmable from 3.5V to 4.4V in 100mV steps
• Temperature Regulation: ±1°C
• Safety Features: Overvoltage protection, thermal shutdown, reverse discharge protection

Pin Configuration

The MCP73834T-B6I/UN has a total of 5 pins:

1. VBAT: Battery voltage input
2. PROG: Charge current programming pin
3. STAT: Status output pin
4. GND: Ground reference
5. VDD: Supply voltage input

Functional Features

• Constant Current/Constant Voltage (CC/CV) charging algorithm
• Automatic charge termination based on charge current and voltage thresholds
• Thermal regulation to prevent overheating
• Reverse discharge protection to prevent battery drain
• Charge status indication through the STAT pin

Advantages

• Compact size allows for space-efficient designs
• High charging efficiency reduces energy waste
• Integrated safety features protect the battery and the charging circuit
• Wide input voltage range provides flexibility in power supply options

Disadvantages

• Limited charge current of up to 1A may not be suitable for high-capacity batteries
• Programming charge voltage requires external resistors, adding complexity to the design

Working Principles

The MCP73834T-B6I/UN operates on the CC/CV charging algorithm. Initially, it delivers a constant current to the battery until the programmed charge voltage is reached. Then, it switches to a constant voltage mode to maintain the battery at the desired voltage level. The IC continuously monitors the charge current, voltage, and temperature to ensure safe and efficient charging.

Application Field Plans

The MCP73834T-B6I/UN is widely used in portable electronic devices such as smartphones, tablets, and wearable devices. It is also suitable for various battery-powered applications, including power banks, wireless headphones, and portable medical devices.

Alternative Models

• MCP73831T-2ACI/OT: Similar functionality with a lower charge current capability (up to 500mA)
• MCP73871-2CCI/ML: Higher charge current capability (up to 2A) with additional features like USB On-The-Go (OTG) support

These alternative models provide options based on specific charging requirements and system constraints.

Word count: 314 words