OFF-LINE
SWITCH MODE
TRANSFORMERS
Indicated Parts are UL1950 & CSA-950 Recognized under UL File# E162344
* Designed for Use with Power Integrations IC's.
*DesignEngineeringSupportAvailable.
* Multiple Configurations.
* Designed to Meet UL1950/IEC950 Safety Standards.
GENERAL APPLICATION INFORMATION
PremierMagnetics'Off-LineSwitchModeTransformershavebeendesignedforusewithPowerIntegrations,Inc.TOPXXX
seriesofoff-linePWMswitchingregulatorsintheFlybackBuck-Boostcircuitconfiguration.Thisconversiontopologycan
provideisolatedmultipleoutputswithefficienciesupto90%. Premiers'SwitchingTransformershavebeenoptimizedto
providemaximumpowerthroughput.
TheTOPXXXseriesfromPowerIntegrations,Inc.areselfcontainedupto132KHz controlledPWMswitchingregulators.
This series contains all necessary functions for an off-line switched mode control DC power source. These switching
regulatorsprovideaverysimplesolutiontooff-linedesigns.TheinductorsandtransformerusedwiththePWR-TOPXXX
are critical to the performance of the circuit. They define the overall efficiency, output power and overall physical size.
Below is a universal input high precision 15V @ 2 Amps (30 watt) application circuit utilizing Power Integrations PWR-
TOP226 switching regulator in the flyback buck-boost configuration. The component values listed are intended for
referencepurposesonly.ThesoftstartcapacitorCssisoptionaldependingonthespecificapplication.Simplertopology
is possible depending on the line/load regulation required.
SCHEMATIC
PREMIER MAGNETICS PART NUMBERS:
(REQUEST DATA SHEETS BY PART#)
L1 = PMCU-0330 33mHy EMI/RFI CMC
T1 = POL-30208 MAIN SWITCHING TRANSFORMER
L2 = VTP-01001 10uHy, 1.0Amp INDUCTOR
BR1
ALUMINUM ELECTROLYTIC FILTER CAPACITOR RATINGS:
+30V OUTPUT: C12 >63V, Ripple Rated > 900mA @ 100KHz @ Max. Op. Temp.
PANASONIC: ECA1JFG471
-30V OUTPUT: C10 >63V, Ripple Rated > 95mA @ 100KHz @ Max. Op. Temp.
PANASONIC: ECA1JFG100
+18V OUTPUT: C2 >35V, Ripple Rated > 410mA @ 100KHz @ Max. Op. Temp.
PANASONIC: ECAIVFG470
F1
EMI FILTER
DF04M
400V, 1.0A
HOT RAIL
+90 to 375Vdc
3.1A
250v
L1
PMCU-0330
33mHY
~
+
LINE
1
2
3
C1
63 uF
400V
D5
MUR620
85-265Vac
50/60Hz
C6
0.1uF
+30Vdc
@ 750mA
10
L4
4
~
-
NEUT
C12
470uF
63V
C13
100uF
63V
+
+
+
+
VTP-01001
10uH @ 1.0A
C6 = 0.1uF 250Vac
X2-Saftey Cap
9
+/- 30V RTN
CLAMP
NETWORK
1
SEC #2
VR1
C10
10uF
63V
C11
10uF
63V
L3
P6KE200A
D1
PRI
VTP-01001
10uH @ 1.0A
MUR160
(BYV26C)
8
-30Vdc
@ 50mA
2
D4 MUR620
L2
D2
1N4148
VTP-01001
10uH @ 1.0A
D3
MUR420
U3 NEC
PS2501-1
4
4
5
+18Vdc
@ 300mA
7
6
C
C4
1
R3
11.0K 1%
0.1uF
1/2 OF U3
C2
+
C3
47uF
35V
A
+
BIAS
47uF
35V
U1
C
2
R4
1.0K 1%
E
1/2 OF U3
POWER INT.
PWR-TOP244YAI
PROPERLY SIZED
HEAT SINK
3
SEC #1
18V RTN
C5
47uF
R1
6.2
R2
470
R5
39
1/4W
T1
POL-30208
DRAIN
SOFT
START
SOURCE
KELVIN CONNECT
U2
C TL431
R
1
C9
0.1uF
+
CONTROL
C7 & C8 = 250Vac
Css
4.7uF
Y-SAFTEY CAPACITORS
EMI FILTER
8
A
6
C7
2.2nF
C8
2.2nF
HIGH VOLTAGE RETURN
Specifications subject to change without notice.
pol 03/04
20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 • TEL: (949) 452-0511 • FAX: (949) 452-0512 • http://www.premiermag.com
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