EPR-000013 Datasheet, PDF (15/56 Pages) Power Integrations, Inc. – Engineering Prototype Report (EP13) 43 W / 57 W pk, 5 Output TOPSwitch팜-GX (TOP246Y) Power Supply

08-May-2001
EPR-000013 – 43 W Multiple Output TOP246 Power Supply
8 Transformer Spreadsheets
8.1 230 V_AC, 60 W Peak Load
ACDC_TOPGX_Rev1.1_040401
Copyright Power Integrations Inc. INPUT
2000
INFO OUTPUT
UNIT
TOP_GX_040401.xls: TOPSwitch-GX
Continuous/Discontinuous Flyback Transformer
Design Spreadsheet
ENTER APPLICATION VARIABLES
VACMIN
180
Volts
Customer
Minimum AC Input Voltage
VACMAX
265
Volts
Maximum AC Input Voltage
fL
50
Hertz
AC Mains Frequency
VO
3.3
Volts
Output Voltage
PO
60
Watts
Output Power
n
0.7
Efficiency Estimate
Z
0.5
Loss Allocation Factor
VB
12
tC
3
CIN
68
ENTER TOPSwitch-GX VARIABLES
Volts
mSeconds
µFarads
Bias Voltage
Bridge Rectifier Conduction Time Estimate
Input Filter Capacitor
TOP-GX
TOP246
Universal 115 Doubled/230 V
Chosen Device
KI
ILIMITMIN
TOP246 Power Out 90 W
0.8
1.944 Amps
150 W
External ILIMIT reduction factor (KI=1.0 for default
ILIMIT, KI <1.0 for lower ILIMIT)
Use 1% resistor in setting external ILIMIT
ILIMITMAX
Frequency - (F)=130 kHz,
(H)=65 kHz
fS
fSmin
f
130000
2.376 Amps
1.30E+05 Hertz
1.24E+05 Hertz
Use 1% resistor in setting external ILIMIT
Full (F) frequency option - 130 kHz
TOPSwitch-GX Switching Frequency: Choose between
130 kHz and 65 kHz
TOPSwitch-GX Minimum Switching Frequency
fSmax
1.40E+05 Hertz
TOPSwitch-GX Maximum Switching Frequency
VOR
99
Volts
Reflected Output Voltage
VDS
10
Volts
TOPSwitch on-state Drain to Source Voltage
VD
0.5
Volts
Output Winding Diode Forward Voltage Drop
VDB
0.7
KP
0.60
ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES
Volts
Bias Winding Diode Forward Voltage Drop
Ripple to Peak Current Ratio
(0.4 < KRP < 1.0 : 1.0< KDP<6.0)
Core Type
EER28L
Core
EER28L
P/N:
PC40EER28L-Z
Bobbin
EER28L_BOBBIN P/N:
BEER-28L-1112CPH
AE
0.814 cm^2
Core Effective Cross Sectional Area
LE
7.55 cm
Core Effective Path Length
AL
2520 nH/T^2
Ungapped Core Effective Inductance
BW
21.8 mm
Bobbin Physical Winding Width
M
0
mm
Safety Margin Width (Half the Primary to Secondary
Creepage Distance)
L
3.3
Number of Primary Layers
NS
2
Number of Secondary Turns
Page 15 of 56
Power Integrations, Inc.
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