Content for SG3525

SG3525

The SG3525A series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip + 5.1 V reference is trimmed to ±1 % and the input common-mode range of the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time ad- justment.These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuity and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown,as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulses has been terminated for any reason,the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The SG3525A output stage features NOR logic, giving a LOW output for an OFF state.

200W Modified Square Wave Inverter With Crystal Control

“Hello everyone! Thank you for stopping by this tutorial on how to build a modified square wave inverter that is capable of delivering 200Watts of power. This inverter delivers a modified square wave AC signal of exactly 50 Hz. This …

PWM Module with Dual Source/Sink Outputs using SG3525

“SG3525 PWM module is a great tool for every hobbyist. This circuit can be used in various applications such as switching power supply, DC-DC converter, DC motor speed controller, LED dimer, High voltage power supply, solenoid driver, and electronic …

12W Dimmer with Soft Start for 12V LEDs

“The circuit presented here is a LED dimmer with a soft-start function. The board can drive a LED up to 12W and the circuit can manage a load up to 1A continuous with 12Vsupply. The circuit is built using SG3525 …

220V DC to 220V AC: DIY Inverter Part 2

“Hello everyone. I hope you all are safe and staying healthy. In this instructable I will show you how I made this DC to AC converter that converts 220V DC voltage to 220V AC voltage.The AC voltage generated here …

200Watts 12V to 220V DC-DC Converter

“Welcome to this instructable where I will show you how I made this 12volts to 220volts DC-DC converter with feedback to stabilize output voltage and low battery/ under-voltage protection, without using any microcontroller. Even though the output is high …

SMPS || Charge Your Laptop in a Car

“In this instructable, I have made a SMPS circuit which can be used to charge your laptop in a car or from any 12V battery. You can plug your existing charger in the circuit. It is not an inverter. Basically …

PWM Halogen Lamp Dimmer

“High Current PWM Halogen Dimmer controller project is designed around SG3525 IC and High current MOSFET. Project can handle lamp up to 5 Amps (10Amps Possible with big heat sink) and supply 12-24V DC .Ideal for Halogen Dichroic Lamp or …