LTC4080EMSE#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: MSOP-10E

Essence: The LTC4080EMSE#TRPBF is a high-efficiency, low quiescent current battery charger IC. It is designed to charge single-cell lithium-ion/polymer batteries from various input sources such as USB ports, wall adapters, or solar panels.

Packaging/Quantity: The LTC4080EMSE#TRPBF is available in a 10-pin MSOP package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 3.45V to 5.5V
• Charge Voltage: 4.2V (±1%)
• Charge Current Range: 100mA to 1A (Programmable)
• Quiescent Current: 950nA (Max)
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC4080EMSE#TRPBF has the following pin configuration:

```

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| | --| VIN | --| GND | --| PROG | --| STAT | --| CE | --| ISET | --| VBAT | --| TS | --| VOUT | |___________| ```

Functional Features

1. High Efficiency: The LTC4080EMSE#TRPBF utilizes a synchronous buck topology to achieve high charging efficiency.
2. Low Quiescent Current: With a maximum quiescent current of 950nA, the IC minimizes power consumption when not actively charging.
3. Wide Input Voltage Range: The IC can accept input voltages ranging from 3.45V to 5.5V, allowing it to be powered by various sources.
4. Programmable Charge Current: The charge current can be programmed using an external resistor, providing flexibility in battery charging rates.
5. Thermal Regulation: The IC incorporates thermal regulation to prevent excessive heat buildup during charging.
6. Automatic Recharge: After a battery is fully charged, the IC automatically enters a low-power standby mode and periodically checks the battery voltage for discharge. If a significant voltage drop is detected, the charging process resumes.
7. Reverse Leakage Protection: The LTC4080EMSE#TRPBF includes reverse leakage protection to prevent current flow from the battery back into the charging source.

Advantages and Disadvantages

Advantages: - High charging efficiency - Low power consumption in standby mode - Wide input voltage range allows versatile power sources - Programmable charge current for flexible charging rates - Thermal regulation prevents overheating - Automatic recharge feature ensures battery readiness - Reverse leakage protection enhances safety

Disadvantages: - Limited to single-cell lithium-ion/polymer battery charging - Requires external resistor for charge current programming

Working Principles

The LTC4080EMSE#TRPBF operates as a synchronous buck charger. It regulates the charging process by controlling the current and voltage applied to the battery. The IC monitors the battery voltage, temperature, and charging status to ensure safe and efficient charging. It also incorporates various protection features to prevent overcharging, overheating, and reverse current flow.

Detailed Application Field Plans

The LTC4080EMSE#TRPBF is commonly used in portable electronic devices such as smartphones, tablets, digital cameras, and portable media players. It is also suitable for applications where a single-cell lithium-ion/polymer battery needs to be charged from different power sources, including USB ports, wall adapters, or solar panels.

Detailed and Complete Alternative Models

1. MCP73831: Similar functionality with a different package (SOT-23)
2. BQ24075: Integrated charger with additional power path management features
3. MAX1555: Low-cost linear charger with integrated pass transistor

These alternative models offer similar charging capabilities and can be considered as substitutes for the LTC4080EMSE#TRPBF in specific applications.

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