REVISIONS
REV.
01
02
03
FIRST RELEASE
CORRECT DRIVE OUTPUT CURRENT TO 0.02A
ADD NOTE 7 INTO DRAWING AS PER CUSTOMER REQUEST
DESCRIPTION
ECN NO.
N/A
EE10615
EE13234
DATE
04/11/08
08/26/08
11/04/11
PAGE 4 IS FOR INTERNAL ONLY
PART NUMBER
835-01042
835-01042F
PART DESCRIPTION
Standard version, with Lead(Pb)
RoHS compliant per EU Directive 2002/95/EC(without exemption of solder content)
UNLESS OTHERWISE
SPECIFIED, DIMENSIONS
ARE IN INCH/mm.
TITLE
TRANSFORMER, FLYBACK, SMT, 12 PIN
APPROVALS
DRAWN BY
PROJ. ENG
WARNING !
DATE
11/04/11
11/04/11
11/04/11
11/04/11
SCALE
E & E Magnetic Products Ltd.
DRAWING NO./MODEL
REV
ALL SHEETS OF THIS DOCUMENT ARE
CONTROLLED DOCUMENTATION AND
TOLERANCE ARE:
ARE NOT TO BE RELEASED OUTSIDE
INCH
mm
ANGLE
OF E&E OR ITS SUB-CONTRACTORS
.XXX ± .005 .XX ± .13 X.X ± 0.3
WITHOUTAUTHORIZATION.
.XX ± .02
.X ± .5
X. ± 1
J.P. AI
V. TSUI
APPROVED BY
Q.A.
C.S. WANG
C.M. TSUI
835-01042
DO NOT SCALE
PAGE
03
1
OF
4
.089
2.26
.492
12.50
6
12
.675 MAX
17.15
7
.098
2.50
EE
.837+.020/-.010
21.25+0.50/-0.25
.900
22.86
835-01042
(DATE)
.060
1.52
Pin 1
location
1
6
Recommended
Pad Layout
.028±.004x.016±.004
0.70±0.10x0.40±0.10
.675
17.15 MAX
.012± .008
0.30± 0.20
.335
8.51 MAX
REFERENCE OR
GAUGE PLANE
.098± .010
2.50± 0.25
.492± .010
12.50± 0.25
.050-.080
1.27-2.03
0-8°
1. Dimension are specified in
3. Coplanarity:
0.10
max.
.004
inches
mm
with higher precedence in inches.
.010
2. Unless otherwise specified, all tolerances are ±
0.25
.
4. "(DATE)" includes at least the manufacturing date code(in YYWW format).
5. Dimensions are to be measured in accordance with JEDEC standard 95-1.
6. For RoHS compliant version, 835-01042F, the part will be marked with “835-01042F”, instead
of “835-01042”.
7. The part can support lead free reflow soldering profile with maximum temperature of 260°C for
5 seconds max.
MECHANICAL OUTLINE
E & E Magnetic Products Ltd.
DRAWING NO./MODEL
REV
835-01042
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03
2
OF
DO NOT SCALE
PAGE
4
ELECTRICAL SPECIFICATION @25
°
C:
PARAMETERS
Turns Ratio(pri):(sec)
Turns Ratio(pri):(drive)
Turns Ratio(pri):(bias)
Polarity
DCR(pri)
DCR(sec)
DCR(drive)
DCR(bias)
Inductance, Ls(pri)@100kHz, 0.1Vrms
Inductance, Ls(pri)@100kHz, 0.1Vrms, 1.3Adc
LL(pri), short sec+drive@100kHz, 0.1Vrms
LL(drive), short sec@100kHz, 0.1Vrms
HIPOT(pri+bias):(sec+drive)
UNIT
-
-
-
-
Ω
Ω
Ω
Ω
uH
uH
uH
uH
Vrms
LIMITS
2.24 : 1 ± 2%
3.36 : 1 ± 2%
2.14 : 1 ± 2%
Per Schematic
0.515 Max
0.110 Max
0.57 Max
0.88 Max
150 ± 10%
135 Min
2.0 Max
0.4 Max
1500 Min
1
7
Primary
20 - 57V
5
2
Bias
12V, 0.01A
3
12
11
Secondary
9
10
8
Drive
SCHEMATIC
E & E Magnetic Products Ltd.
DRAWING NO./MODEL
REV
8. Operating temperature: -40°C to +125°C. The part temperature (ambient temperature +
temperature rise) should not exceed the upper limit of the operating temperature under worst
case operating conditions. Circuit design, component placement, PWB trace size and
thickness, airflow and other cooling provisions all affect the part temperature. Part temperature
should be verified in the end application.
9. The secondary windings are to be connected in parallel on the PC board. DCR for secondary is
with winidngs connected in parallel. Turns ratio is with both secondary windings connected in
parallel.
10.Secondary output: 12V, 1A, Drive output: 7.8V, 20mA.
835-01042
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03
3
OF
DO NOT SCALE
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4
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