SG3525-Ka3525 PWM Controller IC

The SG3525 / KA3525 PWM Controller IC is a versatile integrated circuit designed for switch-mode power supply (SMPS), DC-DC converters, and inverter applications. It generates stable PWM (Pulse Width Modulation) signals to control MOSFETs or IGBTs, ensuring high efficiency in power conversion systems.

With features such as voltage reference, error amplifiers, oscillator, soft-start, under-voltage lockout, and dead-time control, the SG3525 provides designers with flexibility and reliability for power regulation and control circuits.

🔹 Applications

• DC-DC converters

• SMPS (Switch Mode Power Supplies)

• UPS (Uninterruptible Power Supplies)

• Solar inverters & power inverters

• Battery charging circuits

• Motor speed control systems

• Power management in embedded systems

🔹 Precautions

• Do not exceed supply voltage (Vcc max 40V)

• Ensure proper dead-time setting to prevent MOSFET/IGBT overlap conduction

• Use decoupling capacitors to minimize noise

• Provide proper heatsinking for power switches controlled by SG3525

• Avoid incorrect feedback connections, which may cause instability

• Protect against ESD damage during handling

🔹 Technical Specifications

• IC Type: PWM Controller IC

• Model: SG3525 / KA3525

• Package: DIP-16 / SOIC-16

• Supply Voltage (Vcc): 8V – 35V (max 40V)

• Reference Output Voltage: 5.1V ±1%

• Oscillator Frequency Range: up to 400 kHz

• PWM Outputs: Dual complementary / single-ended

• Output Current: ±400mA peak

• Soft Start Capability: Yes

• Undervoltage Lockout (UVLO): Built-in

• Dead-Time Control: Adjustable

• Operating Temperature: 0°C to +70°C

📹 Tutorial Video

Watch SG3525 PWM Controller Tutorial

🔹 Related Categories

• IC’s

• Electronics Components

• Power Supplies

• Tools and Accessories

🔹 Summary

The SG3525 / KA3525 PWM Controller IC is a reliable and flexible solution for power electronics applications, providing stable PWM generation, protection features, and efficient power control. Ideal for inverters, SMPS, UPS, and DC-DC converters, it is a must-have for IC’s and Electronics Components collections.