LTC4070EMS8E#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Battery Charger
• Characteristics:
  • Small form factor
  • High efficiency
  • Low quiescent current
  • Wide input voltage range
• Package: MSOP-8
• Essence: The LTC4070EMS8E#TRPBF is a battery charger IC designed for portable devices.
• Packaging/Quantity: Tape & Reel, 3000 pieces per reel

Specifications

• Input Voltage Range: 4.35V to 6V
• Charge Current Range: 100mA to 950mA
• Termination Current: 10% of programmed charge current
• Charge Voltage Accuracy: ±0.5%
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC4070EMS8E#TRPBF has the following pin configuration:

1. VBAT - Battery Input
2. PROG - Charge Current Programming Pin
3. STAT - Status Output Pin
4. GND - Ground
5. CE - Enable Pin
6. ISET - Termination Current Programming Pin
7. VCC - Supply Voltage Input
8. TS - Thermal Shutdown Pin

Functional Features

• Constant-current/constant-voltage charging
• Programmable charge current and termination current
• Automatic recharge
• Charge status indication through the STAT pin
• Thermal shutdown protection

Advantages

• Small package size allows for space-constrained designs
• High efficiency results in faster charging times
• Low quiescent current minimizes power consumption
• Wide input voltage range accommodates various power sources

Disadvantages

• Limited charge current range may not be suitable for high-capacity batteries
• Lack of built-in battery protection features

Working Principles

The LTC4070EMS8E#TRPBF operates on the principle of constant-current/constant-voltage charging. It regulates the charge current and voltage to ensure safe and efficient charging of the connected battery. The charge current and termination current can be programmed using external resistors connected to the PROG and ISET pins, respectively.

The IC also provides automatic recharge functionality, which allows it to restart charging if the battery voltage drops below a certain threshold. The charge status is indicated through the STAT pin, which can be monitored by the system controller.

In case of excessive temperature, the thermal shutdown feature protects the IC from damage by disabling the charging process until the temperature returns to a safe range.

Detailed Application Field Plans

The LTC4070EMS8E#TRPBF is commonly used in various portable devices that require battery charging capabilities. Some typical application fields include:

1. Smartphones and tablets
2. Portable media players
3. Wearable devices
4. Bluetooth headsets
5. GPS navigation systems
6. Portable gaming consoles

Alternative Models

Here are some alternative models that offer similar functionality:

1. MCP73831 - Microchip Technology
2. BQ24075 - Texas Instruments
3. MAX1555 - Maxim Integrated
4. LT3652 - Analog Devices

These alternatives should be evaluated based on specific requirements and design considerations.

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