SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier
SG3525 900W Regulated Switch Mode Power Supply Circuit with dual Output Voltage for High Power Amplifier
SG3525 SMPS (Switching Mode Power Supply) with Dual Output Voltage for Amplifier Circuit
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| SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
In this video, I'll show you how to design a Dual rail power supply for an
audio amplifier with a power handling capacity of up to 900W and +-60V DC. I hope you like and learn something new.
SG3525 PWM IC Description
SG3525 is a Pulse Width Modulator IC. This IC is used to design all kinds of SMPS (Switched Mode Power Supply) and PWM signals for power electronics projects. It has improved performance and fewer external parts and is a 16-pin IC. To control the output voltage, it provides a feedback circuit that controls the voltage by comparing the feedback signal with a reference signal. Based on the feedback current limit, it has a protection circuit that cuts off the PWM signal. In addition, this device has a built-in soft start circuit.
SG3525 is a Pulse Width Modulator IC. This IC is used to design all kinds of SMPS (Switched Mode Power Supply) and PWM signals for power electronics projects. It has improved performance and fewer external parts and is a 16-pin IC. To control the output voltage, it provides a feedback circuit that controls the voltage by comparing the feedback signal with a reference signal. Based on the feedback current limit, it has a protection circuit that cuts off the PWM signal. In addition, this device has a built-in soft start circuit.
SG3525 Features
Supply Voltage: 8V to 35V
Oscillation Range: 100 Hz to 400 kHz
Maximum Power Dissipation: 1000 mW
5.1 V Reference Trimmed TO ± 1 %
Supply Voltage VCC: +40 Vdc
Logic input: -0.3 to 5.5 V
Output current IO: ±500 mA
Reference output current Iref: 50 mA
Oscillator charging current: 5 mA
Power Dissipation PD: 1000 mW
Thermal resistance, junction-to-Air RθJA: 100 ˚C/W
Thermal resistance, junction-to-Case RθJC: 60 ˚C/W
Operating junction temperature TJ: 150 ˚C
Dual-source/sink output drivers
Internal Soft-Start
Pulse by pulse Shutdown
Adjustable dead time control
Separate oscillator sync terminal
Latching PWM to prevent multiple pulses
Watch my YouTube Video Tutorial
Supply Voltage: 8V to 35V
Oscillation Range: 100 Hz to 400 kHz
Maximum Power Dissipation: 1000 mW
5.1 V Reference Trimmed TO ± 1 %
Supply Voltage VCC: +40 Vdc
Logic input: -0.3 to 5.5 V
Output current IO: ±500 mA
Reference output current Iref: 50 mA
Oscillator charging current: 5 mA
Power Dissipation PD: 1000 mW
Thermal resistance, junction-to-Air RθJA: 100 ˚C/W
Thermal resistance, junction-to-Case RθJC: 60 ˚C/W
Operating junction temperature TJ: 150 ˚C
Dual-source/sink output drivers
Internal Soft-Start
Pulse by pulse Shutdown
Adjustable dead time control
Separate oscillator sync terminal
Latching PWM to prevent multiple pulses
SG3525 PWM IC Pinout
| Pin Number | Pin Name | Pin Function |
| 1 | INV | Inverting Input |
| 2 | NINV | Non-Inverting Input |
| 3 | SYNC | Synchronizing IC with an external oscillator frequency. |
| 4 | OSC. Output | Oscillator Output. The frequency of IC is confirmed at this pin. |
| 5, 6 | C T & R T | These pins are used to connect an external capacitor and resistor respectively to set up the frequency of the oscillator circuit. |
| 7 | Discharge (DIS) | This pin is used to determine the dead time for IC. A resistor connected between pin-7 and 5 will decide the frequency of PWM (or dead time). |
| 8 | Soft Start (SS) | A capacitor is connected with this pin and ground. As the name suggests, this pin is used to initiate operation softly. |
| 9 | Compensation (COMP) | This is a compensation pin. It is used to compensate for the error and avoid rapid fluctuations. |
| 10 | Shutdown | This is a shutdown pin. It instantly narrows down to PWM signals to the maximum level if it is set high. This pin is used to shutting down the output of the IC in the event of malfunction or unwanted conditions. |
| 11 | Output A | This is an output pin that is used as an input for external devices. |
| 12 | VSS | This pin is a ground pin. |
| 13 | V C | This is a power pin used to supply input voltage 5-35 V. A resistor is connected to the DC supply. Therefore, this register decides the magnitude of the trigger current to the output current. |
| 14 | Output B | This is an output pin that is used as an input for external devices. |
| 15 | V in | It is a supply input voltage of 8-35 V. |
| 16 | V ref | It is a reference pin used to set reference voltage through pins 1 and 2. |
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| SG3525 PWM IC Pinout and internal block diagram electrobuff.blogspot.com |
SG3525 SMPS Explained
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| SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
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| SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
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| SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
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| SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
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| SG3525 900W Regulated Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
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| SG3525 Switch Mode Power Supply (SMPS) Circuit with dual Output Voltage for High Power Audio Amplifier electrobuff.blogspot.com |
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| SG3525 Switch Mode Power Supply (SMPS) Current Sense and Over current protection Circuit electrobuff.blogspot.com |
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| SG3525 Switch Mode Power Supply (SMPS) Current Sense and Over current protection Circuit electrobuff.blogspot.com |
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| SG3525 Switch Mode Power Supply (SMPS) Current Sense and Over current protection Circuit electrobuff.blogspot.com |
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Sir, i wanna know, how you sizing the output diode that so large, i'm not find any paper or something that fit for that 4800uF capacitor at output
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