LTC4078EDD#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Battery Charger

Characteristics: - High Efficiency - Low Quiescent Current - Wide Input Voltage Range - Programmable Charge Current - Thermal Regulation - Automatic Recharge - Reverse Leakage Protection

Package: DFN-10

Essence: The LTC4078EDD#TRPBF is a high-efficiency battery charger IC designed for single-cell Li-Ion/Polymer batteries. It provides a complete charging solution with programmable charge current, thermal regulation, and automatic recharge.

Packaging/Quantity: The LTC4078EDD#TRPBF is available in a DFN-10 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.35V to 6V
• Charge Voltage: 4.2V
• Charge Current Range: 15mA to 950mA
• Quiescent Current: 55µA
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC4078EDD#TRPBF has the following pin configuration:

1. VBAT - Battery Input
2. PROG - Charge Current Programming Pin
3. STAT - Status Output Pin
4. GND - Ground
5. TS - Thermal Sense Pin
6. CE - Charge Enable Pin
7. ISET - Input Current Limit Programming Pin
8. VCC - Supply Voltage Input
9. BAT - Battery Output
10. VIN - Input Voltage

Functional Features

1. Programmable Charge Current: The PROG pin allows the user to set the desired charge current within the specified range.
2. Thermal Regulation: The TS pin monitors the temperature of the IC and reduces the charge current if the temperature exceeds a certain threshold.
3. Automatic Recharge: The LTC4078EDD#TRPBF automatically restarts the charging process if the battery voltage drops below a specified level.
4. Reverse Leakage Protection: The IC prevents reverse current flow from the battery to the input source.

Advantages

• High efficiency ensures optimal use of power.
• Low quiescent current minimizes power consumption when not charging.
• Wide input voltage range allows compatibility with various power sources.
• Programmable charge current offers flexibility for different battery capacities.
• Thermal regulation protects the battery and IC from overheating.
• Automatic recharge feature ensures continuous charging even after battery discharge.
• Reverse leakage protection prevents damage to the IC and battery.

Disadvantages

• Limited to single-cell Li-Ion/Polymer batteries.
• DFN-10 package may require specialized equipment for soldering.

Working Principles

The LTC4078EDD#TRPBF operates by regulating the charge current and voltage to the connected Li-Ion/Polymer battery. It uses a feedback loop to adjust the charge current based on the battery's voltage and temperature. The IC also monitors the battery's voltage during discharge and initiates automatic recharge if it falls below a certain threshold.

Application Field Plans

The LTC4078EDD#TRPBF is suitable for a wide range of applications that require single-cell Li-Ion/Polymer battery charging. Some potential application fields include: - Portable electronic devices - Wireless communication devices - Medical devices - Industrial equipment - IoT devices

Alternative Models

1. MCP73831: Similar functionality, available in SOT-23 package.
2. MAX1555: Integrated charger with similar features, available in TDFN-8 package.
3. BQ24075: Single-cell charger with thermal regulation, available in QFN-10 package.

These alternative models offer comparable charging capabilities and can be considered as substitutes for the LTC4078EDD#TRPBF.

In conclusion, the LTC4078EDD#TRPBF is a high-efficiency battery charger IC designed for single-cell Li-Ion/Polymer batteries. It offers programmable charge current, thermal regulation, and automatic recharge features. With its wide input voltage range and compact DFN-10 package, it is suitable for various portable electronic devices, wireless communication devices, medical devices, industrial equipment, and IoT devices. Alternative models such as MCP73831, MAX1555, and BQ24075 provide similar functionality and can be used as alternatives to the LTC4078EDD#TRPBF.