07-July-03
EPR-29 – 4 Output, 11 W, Universal Input, DVD Supply
Power Supply Components Selection
CIN
uFarads
Volts
66.0
Input Filter Capacitor
VMIN
VMAX
VCLO
PZ
107
375
170
1.8
Minimum DC Input Voltage
Maximum DC Input Voltage
Clamp Zener Voltage
Volts
Volts
Watts
Estimated Primary Zener Clamp
Loss
Power Supply Output Parameters
VDx
Volts
0.5
15
0.5
23
0.7
53
0.7Output Winding Diode Forward
Voltage Drop
53Output Rectifier Maximum Peak
Inverse Voltage
PIVSx
Volts
ISPx
Amps
Amps
Amps
2.36 4.90 1.35 0.34Peak Secondary Current
1.16 2.41 0.66 0.17Secondary RMS Current
ISRMSx
IRIPPLEx
0.93 1.92 0.53 0.13Output Capacitor RMS Ripple
Current
Transformer Construction Parameters
Core/Bobbin
Core Manuf.
Bobbin Manuf
LPmin
EEL25
Core and Bobbin Type
Core Manufacturing
Generic
Generic
Bobbin Manufacturing
Minimum Primary Inductance
uHenries
1309
NP
64
Primary Winding Number of
Turns
AWG
CMA
AWG
32
Primary Wire Gauge (Rounded
to next smaller standard AWG
value)
Primary Winding Current
Capacity
Cmils/A
237
VOR
Volts
118.00
Reflected Output Voltage
BW
mm
22.00
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
M
L
mm
3.0
1.1
Number of Primary Layers
AE
cm^2
0.40
Core Effective Cross Section
Area
ALG
nH/T^2
319
Gapped Core Effective
Inductance
BM
Gauss
Gauss
3087
818
Maximum Operating Flux Density
BAC
AC Flux Density for Core Curves
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Page 15 of 36
POWERINT [ Power Integrations ]
