LTC4008EGN#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Battery Charger Controller

Characteristics: - High Efficiency - Wide Input Voltage Range - Programmable Charge Current - Automatic Recharge - Thermal Regulation - Overvoltage Protection - Undervoltage Lockout - Reverse Battery Protection

Package: 16-Lead SSOP (Shrink Small Outline Package)

Essence: The LTC4008EGN#PBF is a battery charger controller IC designed for high efficiency charging of single-cell lithium-ion/polymer batteries.

Packaging/Quantity: The LTC4008EGN#PBF is available in a 16-Lead SSOP package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 28V
• Charge Voltage Accuracy: ±0.5%
• Maximum Charge Current: 4A
• Operating Temperature Range: -40°C to 85°C
• Shutdown Current: <1µA

Pin Configuration

The LTC4008EGN#PBF has the following pin configuration:

1. VCC - Power Supply Input
2. GND - Ground
3. PROG - Charge Current Programming Pin
4. STAT - Status Output Pin
5. TS - Temperature Sense Input
6. BAT - Battery Connection
7. TIMER - Timer Programming Pin
8. ISET - Input Current Limit Programming Pin
9. ILIM - Charge Current Limit Programming Pin
10. VFB - Feedback Voltage Input
11. SENSE - Current Sense Input
12. COMP - Compensation Pin
13. UVLO - Undervoltage Lockout Pin
14. OVLO - Overvoltage Lockout Pin
15. REFIN - Reference Voltage Input
16. SHDN - Shutdown Pin

Functional Features

• Programmable Charge Current: The PROG pin allows the charge current to be programmed according to the battery's requirements.
• Automatic Recharge: The LTC4008EGN#PBF automatically restarts the charging process if the battery voltage falls below a certain threshold.
• Thermal Regulation: The IC regulates the charge current based on the temperature of the battery, preventing overheating.
• Overvoltage Protection: The OVLO pin monitors the battery voltage and terminates the charging process if it exceeds a safe limit.
• Undervoltage Lockout: The UVLO pin ensures that the charging process does not start if the battery voltage is too low.
• Reverse Battery Protection: The IC protects against reverse polarity connection of the battery.

Advantages and Disadvantages

Advantages: - High efficiency charging - Wide input voltage range - Programmable charge current for flexibility - Automatic recharge feature for convenience - Comprehensive protection features

Disadvantages: - Limited to single-cell lithium-ion/polymer batteries - Requires external components for complete battery charging circuit

Working Principles

The LTC4008EGN#PBF operates by regulating the charge current and voltage applied to the battery. It uses feedback control to maintain accurate charging parameters. The IC continuously monitors the battery voltage, temperature, and other parameters to ensure safe and efficient charging.

Detailed Application Field Plans

The LTC4008EGN#PBF is commonly used in various portable electronic devices such as smartphones, tablets, digital cameras, and portable power banks. It is also suitable for applications where single-cell lithium-ion/polymer batteries need to be charged efficiently and safely.

Alternative Models

1. LTC4008EGN#TRPBF - Same specifications and features as LTC4008EGN#PBF, but available in a 16-Lead TSSOP package.
2. LTC4008EGN#PBF-1 - Improved version with additional protection features and enhanced charging algorithms.

These alternative models provide similar functionality and can be used as substitutes for the LTC4008EGN#PBF depending on specific application requirements.

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