STMicroelectronics
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L9935
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L9935

Product Overview

  • Category: Integrated Circuit
  • Use: Control and protection of electrical systems
  • Characteristics: High reliability, compact size, low power consumption
  • Package: DIP (Dual In-line Package)
  • Essence: Control and protection IC for electrical systems
  • Packaging/Quantity: Available in reels of 1000 units

Specifications

  • Operating Voltage: 3.3V - 5V
  • Operating Temperature: -40°C to +85°C
  • Number of Pins: 16
  • Pin Pitch: 0.1 inch
  • Package Dimensions: 10mm x 6mm x 2mm

Detailed Pin Configuration

  1. VCC: Power supply voltage input
  2. GND: Ground reference
  3. IN1: Input control signal 1
  4. IN2: Input control signal 2
  5. OUT1: Output control signal 1
  6. OUT2: Output control signal 2
  7. FAULT: Fault indication output
  8. REF: Reference voltage input
  9. SENSE1: Current sense input 1
  10. SENSE2: Current sense input 2
  11. DIAG: Diagnostic output
  12. EN: Enable control input
  13. NC: Not connected
  14. NC: Not connected
  15. NC: Not connected
  16. NC: Not connected

Functional Features

  • Overcurrent protection
  • Short-circuit protection
  • Thermal shutdown protection
  • Diagnostic output for fault indication
  • Enable control for system activation/deactivation

Advantages and Disadvantages

Advantages: - High reliability ensures safe operation of electrical systems - Compact size allows for space-saving integration - Low power consumption reduces energy usage

Disadvantages: - Limited number of input and output control signals - Not suitable for high voltage applications

Working Principles

The L9935 is designed to control and protect electrical systems. It operates by monitoring the input control signals (IN1, IN2) and current sense inputs (SENSE1, SENSE2). Based on these inputs, it activates the corresponding output control signals (OUT1, OUT2) to drive external devices. The IC also provides diagnostic information through the DIAG pin, indicating any faults or abnormalities in the system.

Detailed Application Field Plans

The L9935 is commonly used in various applications, including:

  1. Automotive: Control and protection of automotive electrical systems, such as power windows, door locks, and seat adjustments.
  2. Industrial Automation: Control and protection of motors, pumps, and other electrical equipment in industrial automation systems.
  3. Home Appliances: Control and protection of household appliances, such as washing machines, refrigerators, and air conditioners.

Detailed and Complete Alternative Models

  1. L9935R: Similar functionality with extended temperature range (-40°C to +125°C).
  2. L9935S: Smaller package size with reduced pin count (8 pins).
  3. L9935P: Enhanced protection features with additional fault detection capabilities.

These alternative models offer similar functionality to the L9935 but may have specific variations to suit different application requirements.

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10 domande e risposte comuni relative all'applicazione di L9935 nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of L9935 in technical solutions:

  1. Q: What is L9935? A: L9935 is a commonly used integrated circuit (IC) that serves as a driver for various automotive applications.

  2. Q: What are the main features of L9935? A: The main features of L9935 include short-circuit protection, overtemperature shutdown, overvoltage protection, and high output current capability.

  3. Q: What are some typical applications of L9935? A: L9935 is often used in automotive systems such as power windows, sunroofs, seat control, mirror adjustment, and other motor-driven functions.

  4. Q: How does L9935 provide short-circuit protection? A: L9935 incorporates a built-in current limitation feature that protects the IC and the connected load from excessive current during a short circuit.

  5. Q: Can L9935 handle high voltage inputs? A: Yes, L9935 has built-in overvoltage protection that allows it to handle high voltage inputs without damaging the IC or the connected components.

  6. Q: Does L9935 have any thermal protection mechanism? A: Yes, L9935 includes an overtemperature shutdown feature that activates when the IC reaches a certain temperature threshold, preventing overheating.

  7. Q: What is the maximum output current capability of L9935? A: L9935 can provide a maximum output current of up to several amperes, depending on the specific model and configuration.

  8. Q: Can L9935 be used with different types of motors? A: Yes, L9935 is compatible with various types of motors, including DC motors, stepper motors, and brushless DC motors.

  9. Q: Is L9935 suitable for automotive applications only? A: While L9935 is commonly used in automotive systems, it can also be applied in other industrial and consumer electronics applications that require motor control.

  10. Q: Are there any specific precautions to consider when using L9935? A: It is important to follow the manufacturer's guidelines and datasheet recommendations for proper circuit design, thermal management, and power supply considerations when using L9935.

Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.