EPR-33 Datasheet, PDF (14/32 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 33 - 45 W LCD Monitor External Power Supply using TOP247Y (TOPSwitch-GX)

EPR-33 – 45 W External Adapter Supply
28-Mar-2003
Power Supply Output Parameters
VDx
PIVSx
ISPx
ISRMSx
IRIPPLEx
Volts
Volts
Amps
Amps
Amps
0.5 Output Winding Diode Forward Voltage Drop
59 Output Rectifier Maximum Peak Inverse Voltage
11.95 Peak Secondary Current
6.43 Secondary RMS Current
5.22 Output Capacitor RMS Ripple Current
Transformer Construction Parameters
Core/Bobbin
EI28
Core Manuf.
Generic
Bobbin Manuf
Generic
LP
uHenries
521
NP
32
NB
4.06
AWG
AWG
24
CMA
VOR
BW
M
L
AE
ALG
BM
BP
BAC
LG
LL
LSEC
Cmils/A
Volts
mm
mm
cm^2
nH/T^2
Gauss
Gauss
Gauss
mm
uHenries
nHenries
444
100.00
9.60
0.0
2.0
0.86
509
2871
4013
574
0.19
3.9
10
Core and Bobbin Type
Core Manufacturing
Bobbin Manufacturing
Primary Inductance
Primary Winding Number of Turns
Bias Winding Number of Turns
Primary Wire Gauge (Rounded to next smaller standard AWG value)
Warning! Primary wire gauge is less than recommended minimum (26 AWG) and
may overheat
Tip: Consider a parallel winding technique (bifilar, trifilar), increase size of
transformer (larger BW)
Primary Winding Current Capacity
Reflected Output Voltage
Bobbin Physical Winding Width
Safety Margin Width
Number of Primary Layers
Core Effective Cross Section Area
Gapped Core Effective Inductance
Maximum Operating Flux Density
Peak Flux Density
AC Flux Density for Core Curves
Gap Length
Estimated Transformer Primary Leakage Inductance
Estimated Secondary Trace Inductance
Secondary Parameters
NSx
Rounded Down NSx
Rounded
Volts
Down Vox
Rounded Up NSx
Rounded Up
Vox
AWGSx
Range
Volts
AWG
4.00 Secondary Number of Turns
Rounded to Integer Secondary Number of Turns
Auxiliary Output Voltage for Rounded to Integer NSx
Rounded to Next Integer Secondary Number of Turns
Auxiliary Output Voltage for Rounded to Next Integer NSx
15 - Secondary Wire Gauge Range
19 Comment: Primary wire gauge is less than recommended minimum (26 AWG) and may
overheat
Tip: Consider a parallel winding technique (bifilar, trifilar), increase size of transformer
(larger BW) or reduce margin (M).
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
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