IRAC1166-100W International Rectifier, IRAC1166-100W Datasheet - Page 21

• Manufacturer Part Number: IRAC1166-100W
• Description: BOARD DEMO 100W FOR IR1166
• Manufacturer: International Rectifier

Specifications of IRAC1166-100W

• Main Purpose: AC/DC, Secondary Side
• Outputs And Type: 1, Isolated
• Power - Output: 100W
• Voltage - Output: 16V
• Current - Output: 6.25A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Flyback
• Board Type: Fully Populated
• Utilized Ic / Part: IR1166S, IRF7853
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -

8.0 Summary :
mosfets (as synchronous rectifiers) by simple fast-rate direct-voltage-sensing technique. It also
featured the flexibility of the IC to cope with different current conduction modes of flyback
converter designs.
operates in variable frequency critical conduction mode (VF-CrCM). This configuration has lead
to achieve better efficiency and a much simpler overall system design normally required in
single output flyback high current applications such those use in laptop power adaptors.
– replacing the traditional Schottky rectifiers - has brought a string of advantages such as
avoiding the use of heavy heat sinks and simple gate drive circuit for the synchronous mosfets.
This design simplification has resulted to saving in PCB area due to reduction of part counts
and elimination of bulky heat sink.
9.1 Transformer turns ratio, Duty Cycle and Secondary
This 100W demo board has shown the efficiency improvement using low voltage SO8 mosfets
Rev.1A
This demo board showcases the performance of IR1166 SmartRectifier Control IC to drive
The low-side synchronous rectification is fully demonstrated in this demo board, which
Current Relationship
3.30
3.10
2.90
2.70
2.50
2.30
2.10
1.90
1.70
1.50
1.30
1.10
0.90
0.70
0.50
0.20
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: [phone]
Fig. 9.1 Graphical estimation chart for Isec
18 August 2006
Dmax xfmr vs. Isec rms / Io ave ratio, @ Different Operational Duty cycle
http://www.irf.com/ Data and specifications subject to change without notice.
0.25
Dmax cntrlr=40%, Vdcmin=100, Vsec=16.1
Dmax cntrlr=50%, Vdcmin=100, Vsec=16.1
Dmax cntrlr=60%, Vdcmin=100, Vsec=16.1
Dmax cntrlr=70%, Vdcmin=100, Vsec=16.1
Dmax cntrlr=50%, Vdcmin=200,Vsec=16.1
Dmax cntrlr=50%, Vdcmin=100,Vsec=12.1
Dmax cntrlr=50%, Vdcmin=200,Vsec=12.1
Dmax cntrlr=50%,Vdcmin=100, Vsec=20
Dmax cntrlr=50%,Vdcmin=200, Vsec=20
where Vdcmin=100, 200 and Vsec = 16V1, 12V1, 20V
0.30
Dmax Xfmr = NVsec / (NVsec + Vdcmin)
0.35
0.40
0.45
RD#0618
0.50
0.55
rms
/ Io
ave
0.60
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0.65