LTC4090EDJC#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Battery Charger
• Characteristics: High Efficiency, Compact Size
• Package: 16-Lead DFN (Dual Flat No-Lead)
• Essence: Power Management IC
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

The LTC4090EDJC#PBF is a high-efficiency battery charger IC designed for portable electronic devices. It operates with an input voltage range of 4.95V to 6.5V and provides a regulated output voltage of up to 4.2V. The charging current can be programmed using an external resistor, allowing flexibility in charging different battery types.

The IC incorporates a power path controller that enables the device to operate even when the input voltage is lower than the battery voltage. This feature ensures uninterrupted power supply to the load while simultaneously charging the battery. The LTC4090EDJC#PBF also includes overvoltage protection, reverse current blocking, and thermal shutdown features to ensure safe and reliable operation.

Pin Configuration

The LTC4090EDJC#PBF has a 16-lead DFN package with the following pin configuration:

1. VBAT - Battery Voltage Input
2. PROG - Charging Current Programming Pin
3. STAT - Status Output Pin
4. EN - Enable Pin
5. GND - Ground
6. TS - Thermal Shutdown Pin
7. ISET - Input Current Limit Programming Pin
8. ILIM - Output Current Limit Programming Pin
9. VOUT - Regulated Output Voltage
10. VIN - Input Voltage
11. INTVCC - Internal Voltage Regulator Output
12. BAT - Battery Connection
13. SDA - I2C Serial Data Input/Output
14. SCL - I2C Serial Clock Input
15. NC - No Connection
16. NC - No Connection

Functional Features

• High-efficiency battery charging
• Power path management for uninterrupted operation during charging
• Overvoltage protection and reverse current blocking
• Thermal shutdown for safe operation
• Programmable charging current for different battery types

Advantages and Disadvantages

Advantages

• High efficiency ensures faster charging times
• Compact size allows for integration into small devices
• Power path management enables uninterrupted operation
• Programmable charging current offers flexibility for different batteries

Disadvantages

• Limited input voltage range (4.95V to 6.5V)
• Requires external resistor for charging current programming

Working Principles

The LTC4090EDJC#PBF operates by regulating the input voltage to charge the connected battery while providing power to the load. It uses a power path controller to ensure uninterrupted operation even when the input voltage is lower than the battery voltage. The IC also incorporates various protection features such as overvoltage protection, reverse current blocking, and thermal shutdown to ensure safe and reliable operation.

Application Field Plans

The LTC4090EDJC#PBF is suitable for a wide range of portable electronic devices that require efficient battery charging. Some potential application fields include:

1. Smartphones and tablets
2. Portable gaming consoles
3. Wearable devices
4. Wireless headphones and earbuds
5. Portable medical devices

Alternative Models

Here are some alternative models that offer similar functionality to the LTC4090EDJC#PBF:

1. MAX1555 - Battery Charger IC from Maxim Integrated
2. BQ24075 - Single Cell Li-Ion/Li-Pol Battery Charger IC from Texas Instruments
3. MCP73831 - Standalone Linear Li-Ion/Li-Pol Battery Charger IC from Microchip Technology
4. TPS2513 - USB Dedicated Charging Port Controller and Current-Limited Power Switch IC from Texas Instruments

These alternative models can be considered based on specific requirements and design constraints.

In conclusion, the LTC4090EDJC#PBF is a high-efficiency battery charger IC that offers compact size, power path management, and programmable charging current. It is suitable for various portable electronic devices and provides reliable and efficient battery charging.