SG3525 Pulse Width Modulation Controller IC DIP-16 Package

The SG3525A pulse width modulator control circuit offers improved performance and lower external parts count when implemented for controlling all types of switching power supplies. The on−chip +5.1 V reference is trimmed to
1% and the error amplifier has an input common−mode voltage range that includes the reference voltage, thus eliminating the need for external divider resistors. A sync input to the oscillator enables multiple units to be slaved or a single unit to be synchronized to an external system clock. A wide range of deadtime can be programmed by a single resistor connected between the CT and Discharge pins. This device also features built−in soft−start circuitry, requiring only an external timing capacitor. A shutdown pin controls both the soft−start circuitry 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. The under voltage lockout inhibits the outputs and the changing of the soft−start capacitor when VCC is below nominal. The output stages are totem−pole design capable of sinking and sourcing in excess of 200 mA. The output stage of the SG3525A features NOR logic resulting in a low output for an off−state. Features:- 8.0 V to 35 V Operation 5.1 V +- 1.0% Trimmed Reference 100 Hz to 400 kHz Oscillator Range Separate Oscillator Sync Pin Adjustable Deadtime Control Input Undervoltage Lockout Latching PWM to Prevent Multiple Pulses Pulse−by−Pulse Shutdown Dual Source/Sink Outputs: +-400 mA Peak Pb−Free Packages are Available Specification:- Rating Symbol Value Unit Power Supply Voltage VCC 40 Vdc Collector Supply Voltage VC 40 Vdc Logic Inputs −0.3 to +5.5 V Analog Inputs 40 V Output Current, Source or Sink IO 40 mA Reference Output Current Iref 40 mA Oscillator Charging Current 100 mA Power Dissipation pd 1.5 mW Thermal Resistance, Junction−to−Air RJA 1.25 °C/W Operating Junction Temperature Tj 150 °C Storage Temperature Range Tstg −65 to +150 °C Package Includes:- 1x SG3525 Pulse Width Modulation Controller IC DIP-16 Package Related Document:- SG3525 IC Datasheet