DER-55
TNY267 Multi Output Power Supply
April 20, 2005
Transformer Spreadsheets
INPUT
INFO
OUTPUT
UNIT
ENTER APPLICATION VARIABLES
VACMIN
VACMAX
fL
VO
PO
n
160
270
50
Volts
Volts
Hertz
Volts
Watts
Minimum AC Input Voltage
Maximum AC Input Voltage
AC Mains Frequency
Output Voltage
Output Power
5
10.24
0.75
Efficiency Estimate
Z
tC
CIN
0.50
3.00 mSeconds
uFarads
Loss Allocation Factor
Bridge Rectifier Conduction Time Estimate
Input Filter Capacitor
10
ENTER TinySwitch-II VARIABLES
TinySwitch-II
Chosen Device
ILIMITMIN
ILIMITMAX
fS
fSmin
fSmax
VOR
VDS
tny267
Universal
Power Out 12W
115 Doubled/230V
19W
TNY267
0.42 Amps
0.48 Amps
132000.00 Hertz
120000.00 Hertz
144000.00 Hertz
Volts
TinySwitch-II Minimum Current Limit
TinySwitch-II Maximum Current Limit
TinySwitch-II Switching Frequency
TinySwitch-II Minimum Switching Frequency (inc. jitter)
TinySwitch-II Maximum Switching Frequency (inc. jitter)
Reflected Output Voltage
TinySwitch-II on-state Drain to Source Voltage
Output Winding Diode Forward Voltage Drop
Ripple to Peak Current Ratio (0.6<KRP<1.0 : 1.0<KDP<6.0)
110
0.6
10.00 Volts
Volts
VD
KP
1.14
ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES
Core Type
Core
Bobbin
AE
LE
AL
EF20
EF20
EF20_BOBBIN
P/N:
P/N:
0.34 cm^2
4.49 cm
PC40EF20-Z
*
Core Effective Cross Sectional Area
Core Effective Path Length
Ungapped Core Effective Inductance
Bobbin Physical Winding Width
Safety Margin Width (Half the Primary to Secondary Creepage
Distance)
1570.00 nH/T^2
12.20 mm
BW
M
L
NS
0
2
3
mm
Number of Primary Layers
Number of Secondary Turns
DC INPUT VOLTAGE PARAMETERS
VMIN
VMAX
179.12 Volts
381.84 Volts
Minimum DC Input Voltage
Maximum DC Input Voltage
CURRENT WAVEFORM SHAPE PARAMETERS
DMAX
IAVG
IP
IR
IRMS
0.39
Maximum Duty Cycle
0.08 Amps
0.42 Amps
0.45 Amps
0.15 Amps
Average Primary Current
Minimum Peak Primary Current
Primary Ripple Current
Primary RMS Current
TRANSFORMER PRIMARY DESIGN PARAMETERS
LP
NP
1134.14 uHenries
58.93
Primary Inductance
Primary Winding Number of Turns
ALG
BM
BAC
ur
326.60 nH/T^2
2763.39 Gauss
1381.69 Gauss
1674.52
Gapped Core Effective Inductance
Maximum Flux Density, (BP<3100)
AC Flux Density for Core Loss Curves (0.5 X Peak to Peak)
Relative Permeability of Ungapped Core
Gap Length (Lg > 0.1 mm)
LG
0.10 mm
BWE
OD
INS
DIA
AWG
CM
24.40 mm
0.41 mm
0.06 mm
0.35 mm
28.00 AWG
161.27 Cmils
Effective Bobbin Width
Maximum Primary Wire Diameter including insulation
Estimated Total Insulation Thickness (= 2 * film thickness)
Bare conductor diameter
Primary Wire Gauge (Rounded to next smaller standard AWG value)
Bare conductor effective area in circular mils
CAN DECREASE CMA < 500 (decrease L(primary layers),increase
NS,smaller Core)
CMA
Info
1105.22 Cmils/Amp
TRANSFORMER SECONDARY DESIGN PARAMETERS
Lumped parameters
Power Integrations
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www.powerint.com
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