TL494 PULSE WIDTH MODULATION CONTROL SOP-16

The TL494 integrated circuit (IC) is a popular choice for controlling power supplies in various electronic devices. This guide explores the TL494’s functionalities, key features, and applications, empowering you to determine if it’s suitable for your project. The TL494 is a fixed-frequency, pulse width modulation (PWM) control circuit designed primarily for regulating voltage in switch-mode power supplies. It integrates all the necessary functions to create a PWM control circuit on a single chip, simplifying power supply design.

Key Features of the TL494 Pulse Width Modulation Controller IC:

• • Pulse Width Modulation (PWM) Control: The TL494 modulates the output voltage by varying the pulse width of the signal, enabling efficient power conversion.
  • Internal Oscillator: Features an on-chip oscillator to generate the clock signal for PWM operation.
  • Error Amplifiers: Includes two built-in error amplifiers for comparing the reference voltage with the output voltage, ensuring accurate regulation.
  • Dead-Time Control: Provides adjustable dead-time to prevent shoot-through current in output transistors, improving efficiency.
  • Output Control: Offers options for single-ended or push-pull output configurations for driving various power supply circuits.
  • Under voltage Lockout (UVLO): Protects the device by shutting down operation when the input voltage falls below a certain threshold.

Technical of the TL494 Pulse Width Modulation Controller IC:

• • Input Voltage Range: Typically between 7V and 40V (consult datasheet for specific range).
  • Output Current: The maximum current each output pin can source or sink (usually around 500mA).
  • Oscillator Frequency: The range of frequencies the internal oscillator can operate at (often adjustable with external components).
  • Dead-Time Range: The adjustable range of the dead-time between output pulses.

Applications of the TL494 Pulse Width Modulation Controller IC:

• • AC-to-DC Converters: Regulating voltage from AC mains power in various electronic devices.
  • DC-to-DC Converters: Boosting, bucking, or inverting DC voltages for powering specific circuits.
  • Battery-Powered Devices: Efficient power management in battery-powered devices with voltage regulation needs.
  • Solar Power Inverters: Converting DC voltage from solar panels to usable AC voltage.
  • LED Driver Circuits: Can be used in some LED driver circuits to regulate current for powering LEDs.

Equivalents of the TL494 Pulse Width Modulation Controller IC:

• • Several functional equivalents of the TL494 exist, offering similar features with potential variations in specifications or package types. Some examples include the NCV494 (automotive grade) and the KA7500. Consulting the datasheets of these alternatives is recommended to ensure compatibility with your project requirements.
  • TL494 PWM Controller IC
  • Pulse Width Modulation Control Circuit
  • Switch-Mode Power Supply Controller
  • SMD Power Management IC
  • DC-DC Converter IC

Package Includes:

• • 1 x TL494 Pulse Width Modulation Controller IC SOP-16