SG3525AN ST DC-DC Controllers

The SG3525AN is a high-performance pulse width modulator (PWM) IC from STMicroelectronics in 16-pin DIP package, specifically designed for switch-mode power supply control with advanced protection features. For selection, verify supply voltage from 8V to 35V, oscillator frequency range from 100Hz to 500kHz (adjustable via external components), maximum duty cycle of 49% preventing transformer saturation in push-pull designs, reference voltage of 5.1V with ±1% accuracy, dual totem-pole output drivers capable of sourcing/sinking 500mA (peak), and operating temperature from 0°C to +70°C. Features include undervoltage lockout with hysteresis for jitter-free startup, soft-start capability requiring only external timing capacitor, adjustable dead-time control via single resistor, oscillator synchronization input for multiple-unit locking, shutdown control for PWM latch and soft-start discharge, and voltage feed-forward for improved line regulation. Ideal applications include offline SMPS (switch-mode power supplies), DC-DC converters, push-pull converters, uninterruptible power supplies (UPS), battery chargers with current limiting, photovoltaic inverters, and industrial power control systems requiring voltage-mode PWM control with complementary outputs. In stock at HL Electronics – request a quote for fast delivery.