EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
07-July-03
8 Transformer Spreadsheet
Design Warning (No Optimization)
Power Supply Input
VACMIN
VACMAX
FL
Volts
90
265
50
Min Input AC Voltage
Volts
Max Input AC Voltage
AC Main Frequency
Hertz
TC
mSeconds
2.21
Bridge Rectifier Conduction Time
Estimate
Z
0.52
79.0
Loss Allocation Factor
N
%
Efficiency Estimate
Power Supply Outputs
VOx
IOx
Volts
3.30 5.00 12.00 12.00Output Voltage
Amps
0.700 1.450 0.400 0.100Output Current
Device Variables
Device
TNY268P/G
Device Name
PO
Watts
15.56
Total Output Power
Warning! Device may be too
small or thermally limited for
continuous power level (PO).
Tip: Consider increasing
device size. If P/G or R-
package select larger device
(reduce current limit via X-pin)
or choose Y/F-package with
appropriat
VDRAIN
Volts
643
Maximum Drain Voltage
Estimate (Includes Effect of
Leakage Inductance)
VDS
Volts
Hertz
Hertz
Hertz
2.9
132000
120000
144000
Device On-State Drain to Source
Voltage
TinySwitch-II Switching
Frequency
TinySwitch-II Minimum Switching
Frequency (inc. Jitter)
TinySwitch-II Maximum
Switching Frequency (inc. Jitter)
Ripple to Peak Current Ratio
FSNOM
FSMIN
FSMAX
KRPKDP
ILIMITMIN
ILIMITMAX
IRMS
0.61
0.51
0.59
0.27
0.53
Amps
Amps
Amps
Device Current Limit Minimum
Device Current Limit Maximum
Primary RMS Current
DMAX
Maximum Duty Cycle
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
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