REVISIONS
REV.
01
FIRST RELEASE
DESCRIPTION
ECN NO.
N/A
DATE
11/29/08
PART NUMBER
835-01072
835-01072F
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.
PAGE 4 IS FOR INTERNAL ONLY
TITLE
TRANSFORMER, SMT, 12 PIN
APPROVALS
DRAWN BY
PROJ. ENG
WARNING !
DATE
11/29/08
11/29/08
11/29/08
11/29/08
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
W.P. CHENG
W.P. CHENG
V. TSUI
C.M. TSUI
APPROVED BY
Q.A.
835-01072
DO NOT SCALE
PAGE
01
1
OF
4
.590
14.99
5
12
.840±.020
21.34±0.51
7
.130
3.30
.118
3.00
EE
1.150
29.21 MAX
835-01072
(DATE)
1
.028
TYP
0.71
6
1.190
30.23
.060
1.52
Recommended
Pad Layout
.012±.008
0.30±0.20
.450
MAX
11.43
REFERENCE OR
GAUGE PLANE
.118±.010
3.00±0.25
.590±.010
14.99±0.25
.080 TYP
2.03
1. Dimension are specified in
3. Coplanarity:
.006
0.15
inches
mm
MECHANICAL OUTLINE
with higher precedence in inches.
.010
2. Unless otherwise specified, all tolerances are ±
0.25
.
max.
4. "(DATE)" includes at least the manufacturing date code(in YYWW format) plus two character
country code.
5. For RoHS compliant version, 835-01072F, the part will be marked with “835-01072F”, instead
of “835-01072”.
E & E Magnetic Products Ltd.
DRAWING NO./MODEL
REV
835-01072
SCALE
01
2
OF
DO NOT SCALE
PAGE
4
ELECTRICAL SPECIFICATION @25°C:
PARAMETERS
Turns Ratio(Pri):(Sec):(Aux)
Polarity
Inductance, Ls(Pri)@250kHz, 0.7Vrms, 0Adc
Inductance, Ls(Pri)@250kHz, 0.7Vrms, 2.6Adc
LL(Pri), short Sec@250kHz, 0.7Vrms
DCR(Pri)
DCR(Sec)
DCR(Aux)
HIPOT(Pri):(Sec)
UNIT
-
-
uH
uH
uH
Ω
Ω
Ω
Vrms
LIMITS
1 : 0.14 : 0.33 ± 5%
Per Schematic
100 ± 10%
90 Min
2.50 Max
0.081 Max
0.0063 Max
0.235 Max
1500 Min
1
2
12
11
10
Pri
4
3
5
Sec
9
8
7
Aux
6
SCHEMATIC
6. 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.
7. Peak primary current, 2.6A, is drawn at minimum input voltage.
8. The transformer is designed for a 250kHz switching frequency with an input of 36-72 volts.
Output of the auxiliary winding is 12V, 0.1A. Output of the secondary winding is 5V, 6A.
9. DCR is with the windings connected in parallel. Turns ratio is with the primary and the
secondary windings connected in parallel.
SCALE
E & E Magnetic Products Ltd.
DRAWING NO./MODEL
REV
835-01072
DO NOT SCALE
PAGE
01
3
OF
4