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SG3525 Pulse Width Modulation Controller IC DIP-16 Package

42.00 Excluding tax

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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 Under voltage 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

* product image for illustration purposes only. actual product may vary.

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