For further features and specifications check datasheet.ĭataSheet SG3525 How and Where to use SG3525.

Other similar integrated circuits are SG2525, UC3525.

The maximum power dissipation is about 1000mW.

It also provides a feature of versatile dead-time control between switching signals to turn on or off devices like MOSFETs, IGBTS and power transistors.

It can operate with a frequency range of 100 to 400KHz.

It has a pulse to pulse shutdown capability.

It also has an external oscillator synchronization pin.It can operate with a supply voltage of between 8 and 35 volts.Sg3525 is used in Dc to DC converter part to control the output voltage and for switching of MOSFETS connected to push-pull converter chopper. I have used a voltage mode PWM controller in pure sine wave inverter. While the current control method uses Output current from output inductor to compare it with the reference value and to set the duty cycle of PWM. In return to control the output voltage of SMPS. The voltage control method used a feedback voltage by comparing it with a reference value to set a duty cycle of PWM. There are two types of PWM controller integrated circuits: I will discuss these things in detail later in this article. These PWM controllers ICs you can use very easily in your SMPS projects by connecting some external circuitry with them according to the selection of frequency. There are many PWM ( Pulse width modulation ) controller integrated circuits available in the market just like SG3525. Therefore, Pulse width modulation is a preferred technique for control circuits of switch-mode power supplies. Pulse width modulation also resolves the issues which occur in Pulse frequency modulation. The width of the pulse or on time increase with the increase in load. On the other hand in Pulse width modulation technique frequency remains constant but the width of pulse changes with the change in load.

But the Pulse frequency modulation technique causes some issues in switch-mode power supplies. In Pulse frequency modulation technique on time of pulse remains constant but the frequency increases with the increase in load. Control-Integrated circuit for SMPS SG3525: Pulse frequency modulation and pulse width modulation are two types of techniques used in control integrated circuits for switch-mode power supplies.

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