LTC4065EDC#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 maximum charging rate - Automatic recharge - Charge termination by timer or current - Reverse battery protection - Overvoltage protection - Undervoltage lockout - Soft-start feature

Package: DFN-10 (3mm x 3mm)

Essence: The LTC4065EDC#TRPBF is a high-efficiency standalone linear battery charger designed for single-cell lithium-ion/polymer batteries. It provides a complete charging solution with minimal external components.

Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 4.95V to 32V
• Charge Voltage: 4.2V
• Charge Current Range: 50mA to 1A
• Quiescent Current: 35µA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

Pin Name | Description --- | --- VIN | Input Supply Voltage GND | Ground PROG | Charge Current Programming Pin STAT | Status Indicator Output FLT | Fault Indicator Output CE | Enable Pin BAT | Battery Connection TS | Thermal Shutdown Pin TIMER | Timer Programming Pin SET | Termination Current Programming Pin

Functional Features

1. High Efficiency: The LTC4065EDC#TRPBF offers high charging efficiency, minimizing power loss during the charging process.
2. Wide Input Voltage Range: It can accept input voltages ranging from 4.95V to 32V, making it suitable for various power sources.
3. Programmable Charge Current: The charge current can be programmed using the PROG pin, allowing flexibility in charging different battery capacities.
4. Thermal Regulation: The charger incorporates thermal regulation to maximize the charging rate while preventing overheating.
5. Automatic Recharge: After a charge cycle is completed, the LTC4065EDC#TRPBF automatically enters a low-current standby mode and monitors the battery voltage. If the voltage drops below a certain threshold, it initiates another charging cycle.
6. Charge Termination Options: Charging can be terminated based on either a timer or the detection of a minimum charge current.
7. Protection Features: The charger includes reverse battery protection, overvoltage protection, and undervoltage lockout to ensure safe operation.
8. Soft-Start Feature: The soft-start feature limits the inrush current during power-up, preventing excessive stress on the input power source.

Advantages

• High efficiency results in reduced power consumption and longer battery life.
• Wide input voltage range allows compatibility with various power sources.
• Programmable charge current enables charging different battery capacities.
• Thermal regulation optimizes charging rate without risking overheating.
• Automatic recharge ensures the battery remains charged even after discharge events.
• Multiple charge termination options provide flexibility for different applications.
• Protection features enhance safety during charging.
• Soft-start feature prevents excessive inrush current.

Disadvantages

• Limited to single-cell lithium-ion/polymer batteries.
• Not suitable for charging multiple batteries simultaneously.

Working Principles

The LTC4065EDC#TRPBF operates as a standalone linear battery charger. It regulates the charging process by controlling the charge current and monitoring the battery voltage. The charger uses a constant current/constant voltage (CC/CV) charging algorithm to efficiently charge the battery.

During the CC phase, the charger delivers a constant current to the battery until the battery voltage reaches the programmed charge voltage. Once the battery voltage reaches this level, the charger switches to the CV phase, where it maintains a constant voltage while reducing the charge current.

The charger continuously monitors the battery voltage and terminates the charging process when the voltage reaches a predetermined threshold or when the charge timer expires. It also incorporates protection features such as reverse battery protection, overvoltage protection, and undervoltage lockout to ensure safe operation.

Detailed Application Field Plans

The LTC4065EDC#TRPBF is suitable for a wide range of applications that require single-cell lithium-ion/polymer battery charging. Some potential application fields include:

1. Portable Electronics: Smartphones, tablets, portable media players, and handheld gaming devices.
2. Wearable Devices: Fitness trackers, smartwatches, and wireless earbuds.
3. IoT Devices: Wireless sensors, smart home devices, and connected appliances.
4. Medical Devices: Portable medical equipment, patient monitoring devices, and wearable health trackers.
5. Industrial Equipment: Handheld measurement tools, portable communication devices, and battery-powered instruments.

Alternative Models

1. MCP73831