EPR-000013 Datasheet, PDF (49/56 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
DMAX
0.55
Maximum Duty Cycle
IAVG
0.70 Amps
Average Primary Current
IP
1.75 Amps
Peak Primary Current
IR
0.97 Amps
Primary Ripple Current
IRMS
0.97 Amps
Primary RMS Current
TRANSFORMER PRIMARY DESIGN PARAMETERS
LP
359 µHenries Primary Inductance
NP
53
Primary Winding Number of Turns
NB
7
Bias Winding Number of Turns
ALG
130 nH/T^2 Gapped Core Effective Inductance
BM
1470 Gauss Maximum Flux Density at PO, VMIN (BM<3000)
BP
2654 Gauss Peak Flux Density (BP<4200)
BAC
ur
404 Gauss
1860
AC Flux Density for Core Loss Curves (0.5 X Peak to
Peak)
Relative Permeability of Ungapped Core
LG
0.75 mm
Gap Length (Lg > 0.1 mm)
BWE
30.8 mm
Effective Bobbin Width
OD
0.59 mm
Maximum Primary Wire Diameter including insulation
INS
0.07 mm
Estimated Total Insulation Thickness (= 2 * film
thickness)
DIA
0.52 mm
Bare conductor diameter
AWG
24 AWG
Primary Wire Gauge (Rounded to next smaller
standard AWG value)
CM
406 Cmils
Bare conductor effective area in circular mils
CMA
421
Cmils/Amp
Primary Winding Current Capacity (200 < CMA <
500)
TRANSFORMER SECONDARY DESIGN PARAMETERS (SINGLE OUTPUT / SINGLE OUTPUT EQUIVALENT)
Lumped parameters
ISP
46.18 Amps
Peak Secondary Current
ISRMS
23.00 Amps
Secondary RMS Current
IO
13.64 Amps
Power Supply Output Current
IRIPPLE
18.52 Amps
Output Capacitor RMS Ripple Current
CMS
4600 Cmils
Secondary Bare Conductor minimum circular mils
AWGS
13 AWG
Secondary Wire Gauge (Rounded up to next larger
standard AWG value)
DIAS
1.83 mm
Secondary Minimum Bare Conductor Diameter
ODS
7.70 mm
Secondary Maximum Outside Diameter for Triple
Insulated Wire
INSS
2.94 mm
Maximum Secondary Insulation Wall Thickness
VOLTAGE STRESS PARAMETERS
VDRAIN
417 Volts
Maximum Drain Voltage Estimate (Includes Effect of
Leakage Inductance)
PIVS
10 Volts
Output Rectifier Maximum Peak Inverse Voltage
PIVB
36 Volts
Bias Rectifier Maximum Peak Inverse Voltage
TRANSFORMER SECONDARY DESIGN PARAMETERS (MULTIPLE OUTPUTS)
1st output
VO1
5.0
Volts
Output Voltage
IO1
3.200
Amps
Output DC Current
PO1
16.00 Watts
Output Power
VD1
0.7
Volts
Output Diode Forward Voltage Drop
NS1
3.00
Output Winding Number of Turns
ISRMS1
5.397 Amps
Output Winding RMS Current
Page 49 of 56
Power Integrations, Inc.
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