IR11672ASPBF International Rectifier, IR11672ASPBF Datasheet - Page 14

• Manufacturer Part Number: IR11672ASPBF
• Description: IC MOSFET DRIVER 200V 8-SOIC
• Manufacturer: International Rectifier
• Series: Advanced Smart Rectifier™r

Specifications of IR11672ASPBF

• Configuration: Half Bridge
• Input Type: Non-Inverting
• Delay Time: 60ns
• Current - Peak: 2A
• Number Of Configurations: 1
• Number Of Outputs: 2
• Voltage - Supply: 11.4 V ~ 18 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: *
• Part Status: Active and Preferred
• Package: 8-Pin SOIC(NB)
• Circuit: Switching Regulator Controller
• Topology: Flyback / Resonant Half-Bridge
• Current Mode: Discontinuous / Critical
• Vcc (min): 11.4
• Vcc (max): 18
• Vout (max): 200
• Iout (a): +2 / -7
• Switch Freq (khz): up to 500kHz
• Vgate Clamp (v): 10.7
• Programmability: MOT / OVT
• Enable Pin: Yes
• Isleep (ua): 200
• Automatic Mot Protection: Yes
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• High Side Voltage - Max (bootstrap): -
• Lead Free Status / Rohs Status: RoHS Compliant part

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CCM Turn-off phase
In CCM mode the turn off transition is much steeper and dI/dt involved is much higher. The turn on phase is
identical to DCM or CrCM and therefore won’t be repeated here.
During the SR FET conduction phase the current will decay linearly, and so will V
Once the primary switch will start to turn back on, the SR FET current will rapidly decrease crossing V
turning the gate off. The turn off speed is critical to avoid cross conduction on the primary side and reduce
switching losses.
Also in this case a blanking period will be applied, but given the very fast nature of this transition, it will be
reset as soon as V
Figure 3: Primary and secondary currents and voltages for CrCM mode
Figure 2: Primary and secondary currents and voltages for DCM mode
DS
V
V
crosses V
V
I
V
I
I
PRIM
I
PRIM
SEC
SEC
PRIM
PRIM
SEC
SEC
T1
T1
TH3
.
T2
T2
T3
14
DS
on the SR FET.
time
time
time
time
© 2009 International Rectifier
IR11672AS
TH1
and