Linear Technology/QD Devices
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LTC2946IDE

LTC2946IDE

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Battery Gas Gauge
  • Characteristics: Accurate Coulomb Counter, Wide Input Voltage Range, I2C Interface
  • Package: 12-Lead DFN (3mm x 4mm)
  • Essence: Accurately measures battery charge and discharge
  • Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 2.7V to 100V
  • Operating Temperature Range: -40°C to 85°C
  • Accuracy: ±(0.25% + 50µV) of measured voltage
  • Resolution: 0.69µV/bit
  • I2C Address: 7-bit address 0x64

Pin Configuration

The LTC2946IDE has a total of 12 pins. The pin configuration is as follows:

  1. VIN: Input Voltage
  2. GND: Ground
  3. SDA: I2C Serial Data
  4. SCL: I2C Serial Clock
  5. ALERT: Alert Output
  6. VCC: Power Supply
  7. VBAT: Battery Voltage
  8. VSS: Negative Sense Terminal
  9. VDD: Positive Sense Terminal
  10. TSNS: Temperature Sense
  11. INTVCC: Internal VCC Regulator Output
  12. NC: No Connect

Functional Features

  • Accurate Coulomb Counter for precise battery monitoring
  • Wide Input Voltage Range allows compatibility with various batteries
  • I2C Interface enables easy communication with microcontrollers
  • Programmable Alert Function for customizable battery status notifications
  • Shutdown Mode for power-saving when not in use

Advantages and Disadvantages

Advantages: - High accuracy in measuring battery charge and discharge - Wide input voltage range for versatile applications - Compact package size for space-constrained designs - I2C interface simplifies integration with microcontrollers

Disadvantages: - Limited to 12-Lead DFN package option - Requires external components for temperature sensing

Working Principles

The LTC2946IDE operates by measuring the voltage across a sense resistor connected in series with the battery. By integrating this voltage over time, it accurately calculates the battery charge and discharge. The I2C interface allows the user to read these measurements and configure various settings.

Detailed Application Field Plans

The LTC2946IDE finds applications in various fields, including:

  1. Portable Electronics: Accurate battery monitoring for smartphones, tablets, and wearables.
  2. Energy Storage Systems: Monitoring battery charge and discharge in renewable energy systems.
  3. Electric Vehicles: Precise measurement of battery capacity and health in EVs.
  4. Industrial Equipment: Battery management in industrial machinery and equipment.
  5. Medical Devices: Monitoring battery life in medical devices for patient safety.

Detailed and Complete Alternative Models

  1. LTC2947IDE: Similar functionality with additional temperature sensing integrated.
  2. LTC2945IDE: Lower input voltage range but higher accuracy.
  3. LTC2944IDE: Higher input voltage range but lower resolution.

These alternative models offer different trade-offs in terms of specifications and features, allowing users to choose the most suitable option for their specific application.

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기술 솔루션에 LTC2946IDE 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

Sure! Here are 10 common questions and answers related to the application of LTC2946IDE in technical solutions:

  1. Q: What is LTC2946IDE? A: LTC2946IDE is a high-precision power and energy monitor integrated circuit (IC) developed by Linear Technology (now part of Analog Devices). It is commonly used for monitoring battery charge, voltage, current, and energy in various applications.

  2. Q: How does LTC2946IDE measure battery charge? A: LTC2946IDE measures battery charge by integrating the current flowing into or out of the battery over time. It uses an internal Coulomb counter to accurately track the charge.

  3. Q: Can LTC2946IDE measure battery voltage and current simultaneously? A: Yes, LTC2946IDE can measure battery voltage and current simultaneously. It has built-in ADCs (Analog-to-Digital Converters) that can sample both parameters.

  4. Q: What is the accuracy of LTC2946IDE? A: LTC2946IDE has a high accuracy of typically ±0.5% for voltage measurement and ±1% for current measurement.

  5. Q: Can LTC2946IDE be used with different types of batteries? A: Yes, LTC2946IDE can be used with various types of batteries, including lithium-ion, lead-acid, and nickel-based batteries. It supports a wide range of battery chemistries.

  6. Q: Does LTC2946IDE have any protection features for batteries? A: Yes, LTC2946IDE provides several protection features, such as overvoltage protection, undervoltage lockout, and overcurrent detection. These features help safeguard the battery from potential damage.

  7. Q: Can LTC2946IDE communicate with microcontrollers or other devices? A: Yes, LTC2946IDE supports I2C communication protocol, allowing it to interface with microcontrollers and other devices for data transfer and control.

  8. Q: What is the operating temperature range of LTC2946IDE? A: LTC2946IDE has an extended operating temperature range of -40°C to +125°C, making it suitable for a wide range of environments.

  9. Q: Can LTC2946IDE be used in portable devices or low-power applications? A: Yes, LTC2946IDE is designed to operate in low-power modes, making it suitable for portable devices and low-power applications where energy efficiency is crucial.

  10. Q: Are there any evaluation boards or development tools available for LTC2946IDE? A: Yes, Analog Devices provides evaluation boards and development tools for LTC2946IDE, which can help users quickly prototype and evaluate their designs.

Please note that these answers are general and may vary depending on specific implementation details and requirements.