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  • SG2525A Pulse Width Modulator

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SG2525A Pulse Width Modulator

  • Product Code: 715
  • Availability: 1
  • Price :

    Rs.147.50 (inc GST)

    Qty :

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IF component not in Stock or require more quantity or want to buy in bulk e-mail us your requirements on: dnatechindia "at" gmail.com.

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SG2525A Pulse Width Modulator

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 + 5.1V 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 under voltage lockout which keeps the outputs off and the soft start capacitor discharged for sub-normal input voltages. SG2525A lockout circuitry includes approximately 500 mV of hysteresis for jitterfree 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 SG2525A output stage features NOR logic, giving a LOW output for an OFF state.

Features of SG2525A Pulse Width Modulator

  • Adjustable Deadtime Control

  • Internal Soft-start

  • Pulse-By-Pulse Shutdown

  • Input Undervoltage lockout With Hysteresis

  • Latching PWM to Prevent Multiple Pulses

  • Dual Source/Sink output Drivers

  • Supply Voltage (Vi)40 V

  • Collector Supply Voltage (VC)40 V

  • Oscillator Charging Current (IOSC)5 mA

  • Output Current, Source or Sink (Io)500 mA

  • Reference Output Current (IR)50 mA

  • Current through CT Terminal (IT)5 mA

  • Logic Inputs – 0.3 to + 5.5 V

  • Analog Inputs – 0.3 to Vi V

  • Ptot Total Power Dissipation at Tamb = 70 °C 1000 mW

  • Tj Junction Temperature Range – 55 to 150 °C

  • Tstg Storage Temperature Range – 65 to 150 °C

  • Top Operating Ambient Temperature : SG2525A – 25 to 85°C


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Tags: PWM