ON Semiconductor
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TL494CNG
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TL494CNG

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: PWM Controller
  • Characteristics: High-performance, versatile, and efficient
  • Package: DIP-16 (Dual In-line Package with 16 pins)
  • Essence: Regulates the pulse width modulation (PWM) signal
  • Packaging/Quantity: Available in tubes or reels, quantity varies based on supplier

Specifications

  • Input Voltage: 7V to 40V
  • Output Voltage: 5V to 20V
  • Operating Temperature: -40°C to +85°C
  • Frequency Range: 100Hz to 500kHz
  • Duty Cycle: Up to 100%
  • Output Current: Up to 200mA

Pin Configuration

The TL494CNG IC has a total of 16 pins. The pin configuration is as follows:

  1. Error Amplifier Output (EAOUT)
  2. Error Amplifier Inverting Input (EA-)
  3. Error Amplifier Non-Inverting Input (EA+)
  4. Ground (GND)
  5. Collector of Output Transistor (COL)
  6. Base of Output Transistor (BASE)
  7. Emitter of Output Transistor (EMITTER)
  8. VCC (Positive Supply Voltage)
  9. Feedback Input (FB)
  10. Oscillator Timing Capacitor (CT)
  11. Oscillator Timing Resistor (RT)
  12. Dead Time Control (DT)
  13. Output Control (OC)
  14. Soft Start (SS)
  15. Shutdown (SD)
  16. Output Voltage Sense (VOS)

Functional Features

  • Provides precise regulation of PWM signal
  • Offers adjustable frequency and duty cycle
  • Supports soft-start functionality for smooth power-up
  • Includes error amplifier for accurate feedback control
  • Allows shutdown mode for power-saving operation
  • Provides dead time control for preventing shoot-through current

Advantages and Disadvantages

Advantages: - High-performance PWM controller - Versatile and widely used in various applications - Efficient power management - Precise regulation of output voltage - Supports adjustable frequency and duty cycle

Disadvantages: - Limited output current capacity (up to 200mA) - Requires external components for complete functionality - Relatively complex pin configuration

Working Principles

The TL494CNG is a pulse width modulation (PWM) controller IC that regulates the PWM signal based on the feedback received. It compares the feedback voltage with a reference voltage and adjusts the duty cycle accordingly. By controlling the duty cycle, it regulates the output voltage or current.

The error amplifier amplifies the difference between the feedback voltage and the reference voltage, providing accurate feedback control. The oscillator generates a triangular waveform, which is compared with the amplified error signal to generate the PWM signal.

The dead time control feature ensures that there is no overlap between the high-side and low-side switches, preventing shoot-through current. The soft-start feature gradually increases the duty cycle during startup, preventing sudden voltage spikes.

Detailed Application Field Plans

The TL494CNG is widely used in various applications, including:

  1. Switching Power Supplies
  2. Battery Chargers
  3. DC-DC Converters
  4. Inverters
  5. Motor Speed Controllers
  6. LED Drivers
  7. Audio Amplifiers
  8. Solar Power Systems

Detailed and Complete Alternative Models

Some alternative models to TL494CNG include:

  1. SG3524N
  2. UC3843AN
  3. IRS2153D
  4. KA7500B
  5. MC34063AP

These alternatives offer similar functionality and can be used as replacements depending on specific requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací TL494CNG v technických řešeních

Sure! Here are 10 common questions and answers related to the application of TL494CNG in technical solutions:

  1. Q: What is TL494CNG? A: TL494CNG is a pulse width modulation (PWM) controller IC commonly used in power supply applications.

  2. Q: What is the purpose of TL494CNG? A: TL494CNG is used to regulate the output voltage of power supplies by controlling the duty cycle of the PWM signal.

  3. Q: What is the operating voltage range of TL494CNG? A: The operating voltage range of TL494CNG is typically between 7V and 40V.

  4. Q: Can TL494CNG be used for both step-up and step-down power supplies? A: Yes, TL494CNG can be used for both step-up (boost) and step-down (buck) power supply topologies.

  5. Q: How many PWM outputs does TL494CNG have? A: TL494CNG has two independent PWM outputs that can be used for driving external power MOSFETs.

  6. Q: What is the maximum switching frequency supported by TL494CNG? A: The maximum switching frequency supported by TL494CNG is typically around 300 kHz.

  7. Q: Can TL494CNG be used for battery charging applications? A: Yes, TL494CNG can be used for battery charging applications by adjusting the PWM duty cycle based on the battery voltage.

  8. Q: Does TL494CNG have built-in protection features? A: Yes, TL494CNG provides various protection features like overcurrent protection, overvoltage protection, and thermal shutdown.

  9. Q: Can TL494CNG be used in high-power applications? A: TL494CNG is suitable for medium to high-power applications, depending on the external components used.

  10. Q: Are there any application notes or reference designs available for TL494CNG? A: Yes, the manufacturer of TL494CNG provides application notes and reference designs that can help in implementing the IC in various technical solutions.

Please note that the answers provided here are general and may vary based on specific design requirements and application scenarios.