LTC4078XEDD#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 for Optimal Charging - Reverse Battery Protection - Automatic Recharge - Small Package Size

Package: DFN-10

Essence: The LTC4078XEDD#TRPBF is a high-efficiency battery charger IC designed for various portable devices. It offers programmable charge current, thermal regulation, and reverse battery protection, making it suitable for a wide range of applications.

Packaging/Quantity: The LTC4078XEDD#TRPBF is available in a DFN-10 package. It is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 4V to 40V
• Charge Voltage: Programmable from 3.5V to 20V
• Charge Current: Programmable up to 1A
• Quiescent Current: 950µA (max)
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LTC4078XEDD#TRPBF has the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. PROG: Charge Current Programming Pin
4. STAT: Status Indicator Output
5. CE: Charge Enable Pin
6. VBAT: Battery Voltage Sense
7. TS: Thermal Shutdown Pin
8. BAT: Battery Connection
9. NTC: Negative Temperature Coefficient Pin
10. VOUT: Regulated Output Voltage

Functional Features

1. Programmable Charge Current: The PROG pin allows users to set the desired charge current, enabling flexibility in charging different battery types and capacities.

2. Thermal Regulation: The IC incorporates thermal regulation to optimize the charging process and prevent overheating of the battery or the charger itself.

3. Reverse Battery Protection: The LTC4078XEDD#TRPBF includes reverse battery protection, ensuring that no damage occurs if the battery is connected with reversed polarity.

4. Automatic Recharge: After a charge cycle is completed, the IC automatically enters a low-power standby mode. If the battery voltage drops below a certain threshold, it initiates another charging cycle.

Advantages

• High efficiency results in faster charging times and reduced power consumption.
• Wide input voltage range allows compatibility with various power sources.
• Programmable charge current enables customization for different battery types.
• Thermal regulation prevents overheating and extends battery life.
• Reverse battery protection safeguards against accidental polarity reversal.
• Automatic recharge feature ensures continuous availability of charged batteries.

Disadvantages

• Limited maximum charge current of 1A may not be suitable for high-capacity batteries.
• DFN-10 package may require specialized equipment for soldering and handling.

Working Principles

The LTC4078XEDD#TRPBF operates as a constant-current/constant-voltage (CC/CV) charger. It starts by delivering a programmable constant current to the battery until the charge voltage reaches the programmed level. Once the battery voltage reaches this level, the charger switches to a constant voltage mode, maintaining the voltage while reducing the current. This ensures a safe and efficient charging process.

Detailed Application Field Plans

The LTC4078XEDD#TRPBF can be used in various applications, including but not limited to: - Portable electronic devices - Wireless communication devices - Medical devices - Industrial equipment - Automotive systems

Detailed and Complete Alternative Models

1. LTC4079XEDD#TRPBF: Similar to LTC4078XEDD#TRPBF with additional power path management feature.
2. LTC4080XEDD#TRPBF: Higher charge current capability (up to 2A) with similar features as LTC4078XEDD#TRPBF.
3. LTC4075XEDD#TRPBF: Lower quiescent current and smaller package size compared to LTC4078XEDD#TRPBF.

These alternative models offer different specifications and features, allowing users to choose the most suitable option for their specific requirements.

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