LTC4081EDD#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Battery Charger
• Characteristics: High Efficiency, Low Quiescent Current, Wide Input Voltage Range
• Package: DFN-10
• Essence: Power Management IC for Battery Charging Applications
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Charge Current Range: Up to 950mA
• Programmable Charge Termination Current
• Programmable Charge Termination Voltage
• Automatic Recharge
• Thermal Regulation and Protection
• Battery Temperature Monitoring
• Status Indication Outputs

Pin Configuration

The LTC4081EDD#TRPBF package has the following pin configuration:

1. VIN - Input Voltage
2. GND - Ground
3. PROG - Programming Pin
4. STAT - Status Output
5. TS - Battery Temperature Sense
6. BAT - Battery Connection
7. VOUT - Output Voltage
8. ISET - Charge Current Set
9. CE - Enable Pin
10. VFB - Feedback Voltage

Functional Features

• Wide input voltage range allows compatibility with various power sources.
• High charge current capability enables faster charging times.
• Programmable charge termination current and voltage for optimal battery charging.
• Automatic recharge feature ensures continuous charging when the battery voltage drops.
• Thermal regulation and protection prevent overheating and damage to the IC.
• Battery temperature monitoring ensures safe charging in different environmental conditions.
• Status indication outputs provide visual feedback on the charging process.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Low quiescent current minimizes battery drain during standby. - Wide input voltage range offers flexibility in power source selection. - Programmable charge termination enhances battery life and safety. - Automatic recharge feature ensures uninterrupted charging.

Disadvantages: - Limited to DFN-10 package, which may not be suitable for all applications. - Requires external components for complete battery charging circuitry.

Working Principles

The LTC4081EDD#TRPBF is a power management IC designed specifically for battery charging applications. It operates by converting the input voltage into a regulated output voltage suitable for charging batteries. The IC incorporates various features such as programmable charge termination, automatic recharge, thermal regulation, and battery temperature monitoring to ensure efficient and safe charging.

When an input voltage is applied, the LTC4081EDD#TRPBF regulates it to provide a constant current or constant voltage output, depending on the battery charging stage. The charge termination current and voltage can be programmed to suit different battery chemistries and capacities. The IC also monitors the battery temperature to prevent overheating during charging.

The status indication outputs provide visual feedback on the charging process, allowing users to monitor the progress. The LTC4081EDD#TRPBF includes protection features like thermal regulation and automatic recharge to ensure safe and reliable battery charging.

Detailed Application Field Plans

The LTC4081EDD#TRPBF is widely used in various portable electronic devices that require battery charging capabilities. Some of the common application fields include:

1. Smartphones and Tablets: The LTC4081EDD#TRPBF is used in the charging circuits of smartphones and tablets to efficiently charge their built-in batteries. Its high efficiency and programmable charge termination make it suitable for fast charging applications.

2. Wearable Devices: Battery-powered wearable devices, such as smartwatches and fitness trackers, benefit from the LTC4081EDD#TRPBF's low quiescent current and wide input voltage range. These features enable longer battery life and compatibility with different charging sources.

3. Portable Medical Devices: The LTC4081EDD#TRPBF is utilized in portable medical devices like blood glucose meters and pulse oximeters. Its thermal regulation and battery temperature monitoring ensure safe charging of the device's batteries, critical for reliable operation in healthcare settings.

4. IoT Devices: Internet of Things (IoT) devices often rely on battery power. The LTC4081EDD#TRPBF's compact package and efficient charging capabilities make it suitable for IoT applications where space is limited, and power efficiency is crucial.

Detailed and Complete Alternative Models

1. MCP73831: This IC from Microchip offers similar battery charging capabilities with a wide input voltage range and programmable charge termination. It comes in a SOT-23 package, making it suitable for space-constrained applications.

2. BQ24075: Texas Instruments' BQ24075 is another alternative that provides high-efficiency battery charging with programmable charge termination. It features an integrated power path management function and comes in a small QFN package.

3. MAX1555: Maxim Integrated's MAX1555 is a compact IC designed for single-cell lithium-ion/p