LTC2946HDE

Product Overview

Category: Integrated Circuit (IC)

Use: The LTC2946HDE is a high-precision power and energy monitor IC designed for use in various electronic systems. It provides accurate measurements of voltage, current, power, and energy consumption.

Characteristics: - High precision measurement capabilities - Wide input voltage range - Low power consumption - Small package size - Easy to integrate into existing systems

Package: The LTC2946HDE comes in a compact 16-pin QFN package, which allows for easy mounting on circuit boards.

Essence: The essence of the LTC2946HDE lies in its ability to accurately monitor and measure power and energy consumption in electronic systems.

Packaging/Quantity: The LTC2946HDE is typically sold in reels containing a quantity of 250 units per reel.

Specifications

• Input Voltage Range: 2.7V to 80V
• Current Measurement Range: ±30A
• Power Measurement Range: ±400W
• Energy Measurement Range: ±4000J
• Accuracy:
  • Voltage: ±0.5%
  • Current: ±0.5%
  • Power: ±1%
  • Energy: ±1%

Pin Configuration

The LTC2946HDE features the following pin configuration:

1. VIN+ (Positive Input Voltage)
2. VIN- (Negative Input Voltage)
3. VOUT (Output Voltage)
4. GND (Ground)
5. SDA (I2C Serial Data)
6. SCL (I2C Serial Clock)
7. ALERT (Alert Output)
8. INTVCC (Internal Voltage Regulator Input)
9. VCC (Supply Voltage)
10. VREF (Reference Voltage)
11. VBAT (Battery Voltage)
12. ISENSE+ (Positive Current Sense)
13. ISENSE- (Negative Current Sense)
14. TEMP (Temperature Sensor Input)
15. NC (No Connection)
16. NC (No Connection)

Functional Features

The LTC2946HDE offers the following functional features:

• Accurate measurement of voltage, current, power, and energy consumption
• I2C interface for easy communication with microcontrollers
• Programmable alert thresholds for voltage, current, and power
• Temperature sensor input for monitoring system temperature
• Internal voltage regulator for stable operation

Advantages and Disadvantages

Advantages: - High precision measurements - Wide input voltage range - Low power consumption - Compact package size - Easy integration into existing systems

Disadvantages: - Limited current measurement range - Requires external temperature sensor for temperature monitoring

Working Principles

The LTC2946HDE operates by measuring the voltage across a shunt resistor to determine the current flowing through the load. It then calculates the power by multiplying the voltage and current values. Energy consumption is obtained by integrating the power over time. The IC communicates with a microcontroller via the I2C interface to provide accurate measurements and control functionality.

Application Field Plans

The LTC2946HDE finds applications in various fields, including but not limited to:

1. Battery-powered devices: Enables accurate monitoring of battery voltage, current, and energy consumption in portable electronic devices.
2. Power management systems: Provides precise measurements for power monitoring and optimization in industrial and residential power distribution systems.
3. Renewable energy systems: Facilitates monitoring of energy generation and consumption in solar panels, wind turbines, and other renewable energy sources.
4. Electric vehicles: Allows for accurate measurement of battery voltage, current, and energy usage in electric vehicles, aiding in efficient power management.

Alternative Models

For those seeking alternative options, the following models offer similar functionality to the LTC2946HDE:

1. LTC2945HDE
2. INA226
3. MAX44251

These models provide comparable power and energy monitoring capabilities, but it is recommended to review their specifications and features to determine the best fit for specific applications.

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