TL494IDRE4

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TL494IDRE4 Application Field and Working Principle

The TL494IDRE4 Switching Controller is a Voltage Regulator designed for pulse-width modulation (PWM) control circuits. This device belongs to the same family of regulators as TL494, with the same functions and its maximum output frequency in the range of 5KHz to 3MHz. It is applicable to off-line fixed frequency isolated AC-DC and DC-DC converters, as well as other control applications such as motor controls,lighting controls, power supply controllers and power inverters.

TL494IDRE4 Working Principle

Essentially, the TL494IDRE4 is an analog control IC that utilizes an internal error amplifier, oscillator, and PWM comparator to generate a pulse-width modulated (PWM) signal. It employs a peak current mode control technique and provides protection features like softstart, overload protection, under-voltage protection, and over-voltage protection. In addition, the controller is distributed in a SOP-16 package with a wide operating temperature range.

The internal circuitry of the TL494IDRE4 Switching Controller includes an oscillator, high gain error amplifier, pulse-width modulator, an output driver and an internal clamp circuit. The oscillator frequency is dependent on the values capacitor and resistor selected by the user. The output of the error amplifier is compared with the triangular waveform of the oscillator and the output is compared to the set-point voltage. The duty cycle is then varied accordingly and the resulting PWM signal is applied to the Pulse Width Comparator. If the duty cycle exceeds the triangle wave, the comparator output is high which enables the output driver to drive the power switching MOSFET which is connected externally at the pin.

TL494IDRE4 Applications

The TL494IDRE4 allows users to make simple yet effective DC to DC switching power supplies. It is often used to power DC motors such as those found in robotics, fans, and pumps. Additionally, this controller can also be used in other power control applications, such as AC-DC converters, DC-DC converters, and inverters.

The TL494IDRE4 can also be used to make static phase shift oscillators and to de-bounce switches, as well as other applications in medical, automotive, industrial, and consumer electronics such as motor controls, lighting controls, and power supply controllers. This IC is a great choice for applications requiring high efficiency, low cost, and low power consumption.

Summary

The TL494IDRE4 is a high performance, low power switching controller IC designed for use in a variety of applications. The controller utilizes an internal error amplifier, oscillator, and PWM comparator to generate a pulse-width modulated (PWM) output signal. The TL494IDRE4 offers a wide operating temperature range and a number of protection features, making it a great choice for applications needing high efficiency, low cost, and low power consumption. The application fields of the TL494IDRE4 include AC-DC converters, DC-DC converters, inverters, motor controls, lighting controls, and power supply controllers.

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