LTC4006EGN-4#TRPBF

Product Overview

Category

LTC4006EGN-4#TRPBF belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging lithium-ion batteries in various electronic devices such as smartphones, tablets, laptops, and portable power banks.

Characteristics

• High efficiency: The LTC4006EGN-4#TRPBF offers high charging efficiency, ensuring maximum power transfer to the battery.
• Fast charging: It supports fast charging protocols, allowing for quick replenishment of battery capacity.
• Safety features: The IC incorporates multiple safety mechanisms to prevent overcharging, overcurrent, and overheating, ensuring safe and reliable battery charging.
• Compact package: The LTC4006EGN-4#TRPBF comes in a small form factor package, making it suitable for space-constrained applications.
• Low standby current: It has a low standby current consumption, minimizing power wastage when not actively charging.

Package and Quantity

The LTC4006EGN-4#TRPBF is available in a 16-pin SSOP (Shrink Small Outline Package) with exposed pad. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 4.5V to 36V
• Charging Current Range: Up to 4A
• Charging Voltage Range: 2.5V to 26V
• Operating Temperature Range: -40°C to 85°C
• Efficiency: Up to 95%
• Standby Current: 20µA

Pin Configuration

The LTC4006EGN-4#TRPBF features a 16-pin SSOP package with the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. VCC: Supply voltage for internal circuitry
4. BAT: Battery connection
5. PROG: Charging current programming pin
6. STAT: Status indicator output
7. TS: Temperature sense input
8. ISET: Current limit setting
9. ILIM: Input current limit
10. TIMER: Timer control pin
11. NTC: Negative temperature coefficient thermistor input
12. SCL: Serial clock input
13. SDA: Serial data input/output
14. INTVCC: Internal supply voltage
15. FLT: Fault indicator output
16. PGND: Power ground

Functional Features

• Constant current/constant voltage (CC/CV) charging algorithm
• Automatic battery detection and initialization
• Programmable charging current and voltage
• Thermal regulation to prevent overheating
• Charge termination based on various criteria (voltage, current, timer)
• LED status indicators for charging progress
• Fault detection and reporting

Advantages and Disadvantages

Advantages

• High charging efficiency ensures optimal use of power.
• Fast charging capability reduces charging time.
• Multiple safety features protect the battery and device from damage.
• Compact package allows for easy integration into space-limited designs.
• Low standby current minimizes power consumption during idle periods.

Disadvantages

• Limited to lithium-ion battery charging applications.
• Requires external components for complete charging system implementation.
• Relatively higher cost compared to simpler charging solutions.

Working Principles

The LTC4006EGN-4#TRPBF operates based on a CC/CV charging algorithm. Initially, it detects the connected battery and initializes the charging process. It then applies a constant current to the battery until its voltage reaches a predefined threshold. At this point, the charger switches to a constant voltage mode, maintaining the battery voltage at the specified level while reducing the charging current gradually. Once the charging current drops below a certain threshold or a predetermined timer expires, the charger terminates the charging process.

The IC continuously monitors the battery temperature and adjusts the charging parameters to prevent overheating. It also incorporates various safety mechanisms to protect against overcharging, overcurrent, and other fault conditions.

Detailed Application Field Plans

The LTC4006EGN-4#TRPBF finds applications in a wide range of portable electronic devices that utilize lithium-ion batteries. Some specific application fields include:

1. Smartphones and tablets
2. Laptops and ultrabooks
3. Portable power banks
4. Digital cameras and camcorders
5. Portable gaming consoles
6. Wireless headphones and earbuds
7. Wearable devices such as smartwatches and fitness trackers

Detailed and Complete Alternative Models

1. LTC4006EGN-4#PBF: Similar to LTC4006EGN-4#TRPBF but without exposed pad package.
2. LTC4006EGN-4#PBF-ND: Alternative model available from Digi-Key Electronics.
3. LTC4006EGN-4