DTPA1073
www.dtmagnetics.com sales@dtmagnetics.com engineering@dtmagnetics.com
DT Magnetics International, Inc.
140 Crosby Road
Dover, NH 03820 Local Sales Rep Label
Phone (603) 742-4375
Fax (603) 742-
9165
Date code 0229
80 Watt Flyback Transformer
Electrical Characteristics
Parameter Min Typ Max Units Conditions
Lp Primary Inductance 125 140 155 uH 1-3 1v @ 132khz
Llkg Leakage Inductance 3 uH 1-3 1v @ 132khz (short 3,4,5,6,7,8,9,10)
SRF Self Resonant Frequency 2 MHZ 1-3
Rp DC Resistance Primary .110 Ohms 1-3 @ 25 degC
Rb DC Resistance Bias .045 Ohms 5-6
Rs DC Resistance Secondary .006 Ohms 7-8
Rs DC Resistance Secondary .011 Ohms 9-10
Rs DC Resistance Secondary .011 Ohms 11-12
Performance Specifications
Parameter Min Typ Max Units Conditions
Po Recommended Output Power 20 80 Watts Total Output
Vo Output Voltage 5v 5v,15v,15v 39 Volts Parallel / Individual / Series
Absolute Maximum Ratings
Parameter Min Max Units Conditions
Top Temperature Range - 40 + 130 degC
Tr Temperature Rise 50 degC @ Rated Power
DWV Isolation Voltage 3000 Vrms Pri,bias-sec
DWV Isolation Voltage 1500 Pri-bias
DWV Isolation Voltage 500 Sec-Sec
• Power Integrations TOPSwitch-GX
Family Transformer
• Designed for TOP245-247 Chip Sets*
• Universal Input 85-265 Volts
• Low Leakage Inductance
• Designed to meet IEC950
• Cost Effective Design
• 5v, 15v, & 15v Secondaries
• Custom modifications available
(contact DTM engineering)
Specifications subject to change without notice.
Turns Ratio available on request.
*
80
Watt design uses Top
24
7
3
1
7
8
9
10
11
12
5
6
+V
PRIMARY
+5 V
+15 V
+15 V BIAS
+15 V
DTPA1073
www.dtmagnetics.com sales@dtmagnetics.com engineering@dtmagnetics.com
DT Magnetics International, Inc.
140 Crosby Road
Dover, NH 03820 Local Sales Rep Label
Phone (603) 742-4375
Fax (603) 742-
9165
Date code 0229
Package Specifications Typical Voltage Combinations
1.10" Max.
1.24" Max.
Bottom View
1 6
712
1.20" Max.
0.98"
.985"
.197"
.052" Dia. Hole
Suggested Pad Layout
Measurements are in inches
Specifications subject to change without notice
Output Voltage can be
varied up to 20% by
adjusting the feedback voltage divider.
3
1
7
8
9
10
11
12
5
6
+V
PRIMARY
+36 V
+15 V
+15 V BIAS
RTN
+31 V
3
1
7
8
9
10
11
12
5
6
+V
PRIMARY
+15 V
+5 V
+15 V BIAS
-15 V
RTN
3
1
7
8
9
10
11
12
5
6
+V
PRIMARY
+5 V
+15 V
+15 V BIAS
+30 V
RTN
RTN
