LTC4009IUF#TRPBF

Product Overview

Category

LTC4009IUF#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, and portable power banks.

Characteristics

• High efficiency: The LTC4009IUF#TRPBF offers a high charging efficiency, ensuring maximum power transfer to the battery.
• Fast charging: It supports fast charging protocols, allowing for quick replenishment of the battery's charge.
• Safety features: The IC incorporates multiple safety mechanisms to prevent overcharging, overcurrent, and overheating, ensuring safe and reliable battery charging.
• Compact package: The LTC4009IUF#TRPBF comes in a small and compact 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 LTC4009IUF#TRPBF is available in a 16-pin QFN (Quad Flat No-Lead) package. It is typically sold in reels containing a specified quantity, usually around 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V - 36V
• Charging Current Range: Up to 3A
• Charging Voltage Range: 2.5V - 26V
• Operating Temperature Range: -40°C to 85°C
• Efficiency: Up to 95%
• Standby Current: Less than 1µA

Pin Configuration

The LTC4009IUF#TRPBF features a 16-pin QFN package with the following pin configuration:

1. VIN: Input voltage
2. GND: Ground
3. VCC: Internal IC supply voltage
4. STAT: Charging status indicator output
5. PROG: Programming pin for setting charging parameters
6. ISET: Current limit programming pin
7. TS: Temperature sense input
8. BAT: Battery connection
9. VFB: Feedback voltage input
10. ILIM: Current limit programming pin
11. NTC: Negative temperature coefficient thermistor input
12. TIMER: Timer programming pin
13. SDA: I2C data input/output
14. SCL: I2C clock input
15. INTVCC: Interrupt output
16. FLT: Fault indicator output

Functional Features

• Constant current/constant voltage (CC/CV) charging algorithm
• Automatic battery detection and initialization
• Programmable charging parameters through the PROG pin or I2C interface
• Thermal regulation to prevent overheating
• Charge termination based on various criteria such as voltage, current, and timer
• Fault detection and reporting through the FLT pin

Advantages and Disadvantages

Advantages

• High charging efficiency ensures optimal power transfer.
• Fast charging capability reduces charging time.
• Multiple safety features protect the battery from damage.
• Compact package size allows for easy integration into space-constrained designs.
• Low standby current minimizes power consumption when not in use.

Disadvantages

• Limited to lithium-ion battery charging applications.
• Requires additional external components for complete charging circuit implementation.

Working Principles

The LTC4009IUF#TRPBF operates based on a CC/CV charging algorithm commonly used for lithium-ion batteries. It regulates the charging current during the constant current phase until the battery voltage reaches a predetermined threshold. Then, it switches to the constant voltage phase, maintaining a steady voltage while reducing the charging current gradually. The IC continuously monitors the battery's voltage, current, and temperature to ensure safe and efficient charging.

Application Field Plans

The LTC4009IUF#TRPBF finds applications in various portable electronic devices, including: - Smartphones - Tablets - Portable power banks - Wearable devices - Digital cameras - Handheld gaming consoles

Its compact size, high efficiency, and safety features make it suitable for a wide range of battery-powered consumer electronics.

Alternative Models

For those seeking alternative options, the following models can be considered: - LTC4009A: Similar functionality with minor variations in specifications. - MAX1555: Integrated lithium-ion battery charger with different package options. - BQ24075: Single-cell lithium-ion battery charger with integrated power path management.

These alternatives offer similar charging capabilities and are widely used in battery charging applications.

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