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LA78040B-E

LA78040B-E

Product Overview

Category: Integrated Circuit (IC)

Use: The LA78040B-E is a vertical deflection output IC designed for use in televisions and monitors. It is specifically used in the vertical deflection circuit to drive the deflection yoke, which controls the vertical movement of the electron beam on the screen.

Characteristics: - High integration and compact size - Low power consumption - Excellent linearity and stability - Wide operating voltage range - Built-in thermal protection circuit

Package: The LA78040B-E is available in a small outline package (SOP) with 7 pins.

Essence: This IC plays a crucial role in ensuring the proper functioning of the vertical deflection circuit in televisions and monitors. It converts the horizontal scanning signal into a vertical deflection current, allowing for the accurate display of images on the screen.

Packaging/Quantity: The LA78040B-E is typically sold in reels containing a quantity of 2,500 units per reel.

Specifications

  • Supply Voltage: 9V to 18V
  • Output Current: Up to 1.8A
  • Operating Temperature Range: -20°C to +85°C
  • Standby Power Consumption: Less than 100mW

Detailed Pin Configuration

The LA78040B-E has the following pin configuration:

  1. VCC - Supply voltage input
  2. GND - Ground reference
  3. Pump-up capacitor connection
  4. Pump-up resistor connection
  5. Vertical output coil connection
  6. Pump-down resistor connection
  7. Pump-down capacitor connection

Functional Features

  • Vertical deflection output stage
  • Thermal protection circuit
  • Pump-up and pump-down functions for efficient operation
  • Built-in flyback diode for protection against voltage spikes
  • Internal feedback loop for stability and linearity

Advantages and Disadvantages

Advantages: - High integration reduces the need for external components - Low power consumption helps in energy efficiency - Excellent linearity ensures accurate image display - Wide operating voltage range allows for compatibility with various systems - Built-in thermal protection circuit prevents damage due to overheating

Disadvantages: - Limited to vertical deflection applications only - Not suitable for other circuitry functions

Working Principles

The LA78040B-E operates by receiving the horizontal scanning signal from the television or monitor's circuitry. It then converts this signal into a vertical deflection current, which is used to drive the deflection yoke. The deflection yoke controls the vertical movement of the electron beam, resulting in the proper display of images on the screen.

Detailed Application Field Plans

The LA78040B-E is primarily used in televisions and monitors for vertical deflection purposes. It finds application in various consumer electronic devices, including:

  1. CRT Televisions
  2. LCD Monitors
  3. Plasma TVs
  4. Projection TVs

Detailed and Complete Alternative Models

  1. LA78041 - Similar to LA78040B-E with additional features for improved performance.
  2. LA78042 - Higher power version of LA78040B-E for driving larger deflection yokes.
  3. LA78043 - Enhanced version with advanced protection features and wider operating temperature range.

These alternative models offer similar functionality to the LA78040B-E but may have additional features or specifications tailored to specific requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de LA78040B-E en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of LA78040B-E in technical solutions:

  1. Q: What is LA78040B-E? A: LA78040B-E is a vertical deflection output IC commonly used in CRT displays and televisions.

  2. Q: What is the purpose of LA78040B-E? A: The main purpose of LA78040B-E is to generate the vertical deflection current for driving the vertical deflection coil in a CRT display.

  3. Q: Can LA78040B-E be used in other applications apart from CRT displays? A: No, LA78040B-E is specifically designed for CRT displays and may not be suitable for other applications.

  4. Q: How does LA78040B-E work? A: LA78040B-E works by amplifying the vertical deflection signal and generating the necessary current to drive the vertical deflection coil.

  5. Q: What are the key features of LA78040B-E? A: Some key features of LA78040B-E include built-in pump-up circuit, thermal protection, low power dissipation, and high output current capability.

  6. Q: What is the maximum output current of LA78040B-E? A: The maximum output current of LA78040B-E is typically around 1.8A.

  7. Q: Does LA78040B-E require external components for operation? A: Yes, LA78040B-E requires external components such as resistors, capacitors, and diodes for proper operation.

  8. Q: Can LA78040B-E handle high voltage inputs? A: Yes, LA78040B-E is designed to handle high voltage inputs typically found in CRT displays.

  9. Q: Is LA78040B-E available in different package types? A: Yes, LA78040B-E is available in various package types such as TO-220, DIP-16, and SIP-9.

  10. Q: Are there any recommended application circuits for LA78040B-E? A: Yes, the datasheet of LA78040B-E provides several recommended application circuits that can be used as a reference for designing with this IC.

Please note that these answers are general and may vary depending on specific technical requirements and datasheet specifications.