What is TL494BDG?

 The TL494BDG is a pulse-width modulation (PWM) controller from Texas Instruments, commonly used in power supply circuits for regulating and controlling the voltage and current. It is a high-performance PWM controller designed for use in DC-to-DC converters, power inverters, and switch-mode power supplies (SMPS). The TL494BDG provides comprehensive control features such as adjustable frequency, dead-time control, and overcurrent protection, making it suitable for a wide range of power conversion applications.

https://www.mobikechip.com/static-manufacturers-detail/7513.html 

Key Features:

  1. Dual PWM Controller: The TL494BDG integrates two independent PWM controllers in a single package, allowing for the regulation of both the high-side and low-side switches in full-bridge, half-bridge, or push-pull configurations. This dual functionality is particularly useful in DC-to-DC converters and AC-to-DC power supplies where dual control channels are required.

  2. Adjustable Duty Cycle: The output duty cycle of the PWM can be adjusted using an external control voltage. This provides precise regulation of the output power, making it versatile for a variety of power supply designs, especially where load or input voltage fluctuations need to be compensated dynamically.

  3. Fixed Frequency Oscillator: The TL494BDG includes an internal oscillator that operates at a fixed frequency (typically 50 kHz to 100 kHz), but the frequency can also be adjusted externally. This feature helps achieve the desired power conversion performance while minimizing electromagnetic interference (EMI) by controlling the switching frequency.

  4. Dead-Time Control: The TL494BDG includes dead-time control to prevent overlap between the high-side and low-side switches. This is essential in preventing short circuits and improving the efficiency of the power supply by ensuring proper timing during the switching process. 

  5. Overcurrent and Thermal Protection: The TL494BDG has built-in protection features such as overcurrent protection, thermal shutdown, and under-voltage lockout. These protection mechanisms enhance the reliability and durability of the power supply, ensuring the system operates safely under fault conditions.

  6. Wide Input Voltage Range: The IC operates with a wide input voltage range, making it suitable for a broad spectrum of applications. It can handle input voltages from 8V to 40V, which is typical for DC-to-DC converters and battery-operated devices.

  7. Multiple Output Control: The TL494BDG provides both inverting and non-inverting outputs, giving the flexibility to control various types of external power switches (MOSFETs, transistors) and achieve the desired output voltages and current characteristics.

  8. High Output Drive Capability: The controller provides high-current output drive capabilities, allowing it to directly drive external MOSFETs or IGBTs in the switching stage of the power supply.

Applications:

  • DC-to-DC Converters: The TL494BDG is commonly used in step-down (buck), step-up (boost), and buck-boost converters for efficient voltage conversion in applications ranging from consumer electronics to industrial equipment.
  • Power Supplies: Widely used in switch-mode power supplies (SMPS), including isolated and non-isolated designs, for powering circuits with higher efficiency and smaller form factors compared to linear power supplies.
  • Battery Chargers: The TL494BDG can be used in battery charging circuits where precise voltage and current regulation is needed, such as in lithium-ion battery chargers, solar power systems, and electric vehicles.
  • Power Inverters: Used in DC-to-AC inverters for renewable energy applications, such as solar power inverters, where it converts DC voltage from solar panels or batteries into usable AC voltage for appliances or grid feeding.
  • AC-to-DC Converters: The TL494BDG is useful in applications where alternating current (AC) needs to be rectified and regulated to a stable DC output, such as in power supplies for communication equipment, audio equipment, and industrial control systems.
  • Electric Motor Drives: Commonly used in motor drive systems where precise speed and torque control are needed, particularly in DC motors.

Technical Specifications:

  • Input Voltage Range: 8V to 40V.
  • Oscillator Frequency: Typically 50 kHz to 100 kHz, adjustable via external components.
  • Output Current Drive: Capable of driving external MOSFETs or IGBTs with up to 200 mA of source/sink current per output.
  • Duty Cycle Range: Adjustable duty cycle with control input (0% to 100%).
  • Built-in Protection: Overcurrent protection, thermal shutdown, and under-voltage lockout.
  • Output Type: Both inverting and non-inverting outputs.
  • Package: Available in DIP-16 and SOIC-16 packages.

Advantages:

  • High Efficiency: The TL494BDG enables high-efficiency power conversion by optimizing switching frequencies and reducing losses.
  • Flexible Control: With adjustable duty cycle and external frequency control, it offers flexibility in a wide range of power conversion applications.
  • Integrated Protection: The built-in protection features help prevent system damage, increase operational reliability, and enhance the overall performance of the power supply. 
  • https://www.mobikechip.com/static-product-faq.html 

The TL494BDG is a versatile and reliable PWM controller widely used in power supply circuits for efficient voltage regulation. Its high current drive capability, protection features, and flexible control options make it an excellent choice for a variety of applications, including DC-to-DC converters, battery chargers, power inverters, and other high-efficiency power conversion systems.  

Search List Page： TL494BDG Parts Search Page | Datasheet PDF | Price | Quantity-MobikeChip 

Luminary Micro/Texas Instruments-Manufacturers-Dealer-MobikeChip 

previous article：
What is L9637D?
next article：
What is LNK306P?

评论

发表评论

此博客中的热门博文

What is SN74LS00N Chip?

图片
 The SN74LS00N is a quad 2-input NAND gate integrated circuit from the 74LS (Low Power Schottky) logic family. It is commonly used in digital logic circuits for performing basic logical operations, specifically the NAND operation, which is a fundamental building block in digital electronics.  Key Features: Quad 2-Input NAND Gates : The SN74LS00N contains four independent 2-input NAND gates, allowing it to perform logical NAND operations on two input signals. Each gate has two inputs and one output, making it versatile for building complex logic functions by combining multiple gates. Low Power Consumption : As part of the LS (Low Power Schottky) family, the SN74LS00N is designed to consume less power while maintaining high-speed performance, making it suitable for energy-sensitive applications. Fast Switching Speed : The device features fast switching times (typically around 25 ns at 5V), enabling it to operate at high speeds in digital systems. Wide Supply Voltage Range : ...
阅读全文

RMS to DC Converters: Bridging the Gap Between AC and DC Power

图片
  Understanding RMS to DC Converters: Bridging the Gap Between AC and DC Power In today's electronic landscape, converting power efficiently and accurately is essential for various applications. RMS to DC converters are crucial components that transform the root mean square (RMS) value of an alternating current (AC) signal into a direct current (DC) output. This blog post will explore the fundamentals of RMS to DC converters, their applications, and the technological advancements shaping their development. What Are RMS to DC Converters? RMS to DC converters are devices that convert an AC voltage, represented by its RMS value, into a DC voltage. This process is essential in applications where devices require a stable DC supply but are fed by AC sources. RMS values provide a meaningful way to represent AC signals, particularly in terms of power calculations, making it crucial for converters to accurately reflect these values in their output. The conversion process typically involves ...
阅读全文

What is TNY278PN Chip?

图片
  The   TNY278PN   is a highly integrated   switching power supply IC   from   Power Integrations , part of the TinySwitch family. It is designed for low-power applications, offering an efficient solution for power supply designs while minimizing the number of external components required.   Key Features: Integrated Power MOSFET : The TNY278PN combines a high-voltage power MOSFET with control circuitry in a single package, simplifying the design and reducing the overall component count. Low Power Consumption : Optimized for low standby power consumption, the TNY278PN enables designers to meet energy efficiency regulations while maintaining performance. Wide Input Voltage Range : It operates over an input voltage range of  85V to 265V AC , making it suitable for universal power supply applications across different regions. Output Power : The TNY278PN can deliver up to  12W  of output power in non-isolated applications, making it vers...
阅读全文