ETAL P3908

PRODUCT DATA SHEET
P3908
ADSL Transformer
Features
Applications
∗
∗
∗
∗
∗
∗
∗
∗ Globespan G7000 CPE
∗ ADSL over POTS
Lead-free (Pb-free)
Low Distortion
IEC 950 and UL 60950 Certified
UL Recognized Component
Supplementary Insulation
Surface Mount
Industry Standard Footprint
DESCRIPTION
P3908 is a low distortion transformer for Customer
Premises ADSL over POTS applications using the
Globespan G7000 chipset.
P3908 is certified to safety standards IEC 950 and
UL 60950 for supplementary insulation, 250V
working voltage. P3908 is a UL Recognized
Component and is supported by an IEC CB Test
Certificate.
The part is completely lead-free and suitable for
lead-free and conventional processing.
ETALDOC 3/6
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The safety system yields very low transformer
parasitics, ensuring that P3908 exhibits excellent
frequency response and balance; in combination
with its good harmonic distortion performance,
P3908 is ideally suited to low cost yet demanding
ADSL applications.
January 2004
P3908
SPECIFICATIONS
Electrical
Typical values at T = 25ºC, unless otherwise stated.
Parameter
Conditions
Min
Typ
Max
Units
Inductance
10kHz 100mV
1-5 (link 2-4)
410
433
455
µH
Leakage inductance
100kHz, 100mV, 1-5
(link 2-4; link 6, 7, 9, 10)
-
-
8
µH
Interwinding
capacitance
100kHz 100mV
1-10 (link 1, 2, 4, 5;
link 6, 7, 9, 10)
-
-
30
pF
DC resistance
1-4; 2-5; 6-9; 7-10
-
0.42
-
Ω
Turns ratio
1-4 : 2-5
10-7 : 9-6
1-4 : 10-7
0.99
1.00
1.01
-
-
-
±1.0
dB
Frequency response
(1)
30kHz – 3MHz
Longitudinal balance
(1)
20kHz – 1.1MHz
50
-
-
dB
30kHz 2.5Vrms
-
-
-80
dB
2.12
3.0
-
-
kVrms
kV
-40
-40
-
+85
+85
ºC
ºC
Total Harmonic
(1)
Distortion
Voltage isolation
Operating range:
Functional
Storage
(2)
50Hz
DC
(1, 2, 4, 5 : 6, 7, 9, 10)
Ambient temperature
Notes
1. 100Ω source, 100Ω load.
2. Components are 100% tested at 3.25kV DC.
ETALDOC 3/6
Page 2 of 4
January 2004
P3908
Dimensions
Connections
Fig. 1
Fig. 2
15.40
17.15 max
(0.67)
2,50
(0.098)
CONSTRUCTION
(0.606)
0.80
(0.032)
0.70
(0.028)
2,5
(0.10)
0.7
(0.03)
12.9 max
(0.51)
13.0
(0.51)
12.2 max
(0.48)
CHAMFER
ON BOBBIN
Terminals finished: SnAg
Dimensions shown are in millimetres (inches).
SAFETY
ABSOLUTE MAXIMUM RATINGS
Constructed in accordance with IEC 60950-1,
EN 60950-1 and UL 60950-1, supplementary
insulation, 250V maximum working voltage,
flammability class V-0.
(Ratings of components independent of circuit).
Short term isolation voltage (1s)
2.12kVrms,
3.0kVDC
Installation requirements should be observed
whereby a minimum of 1.0mm creepage and
1.5mm clearance is maintained between the ferrite
core and accessible conductive parts in the host
equipment.
Storage temperature
-40ºC to
+85ºC
Reflow temperature (10s)
260ºC
ETALDOC 3/6
Page 3 of 4
January 2004
P3908
CERTIFICATION
COPYRIGHT
Certified by BSI to IEC 950:1991/A4:1996 (IEC CB
Test Certificate No. GB518W) sub-clauses 1.5,
1.5.1, 1.5.3, 2.2, 2.2.2, 2.2.3, 2.2.4, 2.9.2, 2.9.3,
2.9.4, 4.4, 4.4.3.2 (class V-0) and 5.3 for a
maximum working voltage of 250Vrms, nominal
mains supply voltage not exceeding 300Vrms and
a maximum operating temperature of +85ºC in
Pollution Degree 2 environments, supplementary
insulation, clearance greater than 2.0mm,
creepage greater than 2.5mm, distance through
solid insulation greater than 0.4mm.
ETAL and P3908 are Trade Marks of Profec
Technologies Ltd.
The Trade Mark ETAL is registered at the UK
Trade Marks Registry.
Profec Technologies Ltd. is the owner of the
design right under the Copyright Designs and
Patents Act 1988 and no rights or licences are
hereby granted or implied to any third party.
© 2000 – 2004 Profec Technologies Ltd.
Reproduction prohibited.
Recognized under the Component Recognition
Program of Underwriters Laboratories Inc. to US and
Canadian
requirements
CAN/CSA
C22.2
No. 60950-1-03/UL60950-1, First Edition, based on
IEC 60950-1, First Edition, maximum working voltage
250Vrms, Pollution Degree 2, supplementary
insulation.
UL File number E203175.
Additionally, Profec Technologies certifies all
transformers as providing voltage isolation of
2.12kVrms, 3kV DC minimum. All shipments are
supported by a Certificate of Conformity to current
applicable safety standards.
E203175
ISO 9001
FM 25326
ETAL Group Oy, Kuormatie 14, FIN-03101, Nummela
Telephone: +358 (0)20 7500 330
Fax: +358 (0)20 7500 333
Website: www.etalgroup.com
Email: etalgroup@egruppen.com
ETALDOC 3/6
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January 2004