EPR-29 Datasheet, PDF (15/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-29 - Multiple Output 11 W (15.5 W peak) AC-DC Power Supply using TNY268P

07-July-03
EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
Power Supply Components Selection
CIN
VMIN
VMAX
VCLO
PZ
uFarads
66.0
Volts
107
Volts
375
Volts
170
Watts
1.8
Input Filter Capacitor
Minimum DC Input Voltage
Maximum DC Input Voltage
Clamp Zener Voltage
Estimated Primary Zener Clamp
Loss
Power Supply Output Parameters
VDx
Volts
PIVSx
Volts
ISPx
ISRMSx
IRIPPLEx
Amps
Amps
Amps
0.5 0.5 0.7 0.7 Output Winding Diode Forward
Voltage Drop
15 23 53 53 Output Rectifier Maximum Peak
Inverse Voltage
2.36 4.90 1.35 0.34 Peak Secondary Current
1.16 2.41 0.66 0.17 Secondary RMS Current
0.93 1.92 0.53 0.13 Output Capacitor RMS Ripple
Current
Transformer Construction Parameters
Core/Bobbin
Core Manuf.
Bobbin Manuf
LPmin
NP
uHenries
EEL25
Generic
Generic
1309
64
AWG
AWG
32
CMA
VOR
BW
Cmils/A
Volts
mm
237
118.00
22.00
M
L
AE
ALG
BM
BAC
mm
cm^2
nH/T^2
Gauss
Gauss
3.0
1.1
0.40
319
3087
818
Core and Bobbin Type
Core Manufacturing
Bobbin Manufacturing
Minimum Primary Inductance
Primary Winding Number of
Turns
Primary Wire Gauge (Rounded
to next smaller standard AWG
value)
Primary Winding Current
Capacity
Reflected Output Voltage
Bobbin Physical Winding
Width
Warning! Large bobbin width
(BW) may lead to increased
audio emissions.
Tip: Reduce the bobbin width,
or length, of the core.
Consider changing to an
alternate device family (if
using TinySwitch-II).
Safety Margin Width
Number of Primary Layers
Core Effective Cross Section
Area
Gapped Core Effective
Inductance
Maximum Operating Flux Density
AC Flux Density for Core Curves
Page 15 of 36
Power Integrations, Inc.
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www.powerint.com