IRISMPS1 IRF [International Rectifier], IRISMPS1 Datasheet - Page 4

• Manufacturer Part Number: IRISMPS1
• Description: REFERENCE DESIGN
• Manufacturer: IRF [International Rectifier]

IRISMPS1
Fig 2)Drain (D) voltage of IRIS4007K (CH1) and the FB pin voltage (CH2) at 36VDC in/Full load output
Fig 2) shows the drain voltage and the feedback pin (FB) voltage. In this case the quasi-resonant signal
swings all the way to near zero volts at the drain before the FET is turned on, and hence underthese
conditions the circuit turns the FET on with near zero voltage switching, due to the quasi-resonant switch-
ing. The FB pin signal shows the current ramp when the FET is on(when the drain voltage is low), and the
resonant signal being passed back during the FET off time.
Fig 3) Drain (D) voltage of IRIS4007K (CH1) and the FB pin voltage (CH2) at 72VDC in/Full load output
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