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SMPS control circuit

  • Transducer type: flyback
  • The maximum frequency of the converter, kHz: 67
  • Maximum converter duty cycle, %: 77
  • Failure protection: cur.lim., over load / temp. / Volt.
  • Operating temperature, ° C: -25 … + 85
  • Case: dip-8 (0.300 inch)

MOSFET 650V / Idp = 2.15A, Fosc = 67kHz, Pout 30W [DIP-8]

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The FSDM0365RNB is an integrated Pulse Width Modulator (PWM) and Sense FET specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components. So this device is an integrated high-voltage power-switching regulator that combines an avalanche-rugged SenseFET with a current mode PWM control block. That’s super amazing about it.

However the PWM controller includes an integrated fixed-frequency oscillator, under voltage lockout, leading-edge blanking (LEB), optimized gate driver, internal soft-start, temperature-compensated precise-current sources for a loop compensation, andself-protection circuitry. Therefore compared with a discrete MOSFET and PWM controller solution, it can reduce total cost; component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. Above all this device is a basic platform well suited for cost-effective designs of fly back converters.


Here we have listed all the features for the product. Moreover these features are correct based on this update. Find more about the product and company below. So we have summarized everything for you.


  1. Internal Avalanche-Rugged Sense FET
  2. Advanced Burst-Mode Operation Consumes Under 1W at 240VAC & 0.5W load
  3. Precision Fixed Operating Frequency (66kHz)
  4. Internal Start-up Circuit
  5. Improved Pulse-by-Pulse Current Limiting
  6. Over-Voltage Protection (OVP)
  7. Overload Protection (OLP)
  8. Internal Thermal Shutdown Function (TSD)
  9. Auto-Restart Mode
  10. Under-Voltage Lockout (UVLO) with hysteresis
  11. Low Operating Current (2.5mA)
  12. Built-in Soft-Start
Nom. number 1555413868
Pr-in ON Semiconductor
Series fps
Transducer Type flyback
Existence of exit isolation yes
The presence of an internal switch yes
The maximum voltage of the power switch, V 650
Rated power, W 30
Maximum frequency of the converter, kHz 67
Maximum duty cycle of the converter, % 77
Failure protection cur.lim., over load / temp. / Volt.
Operating temperature, ° C -25 … + 85
Case dip-8 (0.300 inch)
Weight, g 1
Manufacturer ON Semiconductor

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