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ETALDOC 590/8

Page 1 of 4

December 2003

PRODUCT DATA SHEET

MICROPROFILE SMD

P3191

LINE MATCHING TRANSFORMER

Features

Applications

∗

Surface Mount

∗

Telecommunications

∗

Lead-free (Pb-free)

∗

V.34 modems

∗

7mm seated height

∗

Portable computers

∗

Vacuum encapsulated

∗

Fax/Modems

∗

IEC 60950 and UL 60950 certified

∗

UL Recognized Component

∗

Simple 600

Ω

match

DESCRIPTION

P3191 is a low distortion microprofile transformer
for applications where high performance and safety
isolation to international standards are required in an
extremely small case size.

Designed specifically as a surface mount device, the
P3191 features a 7mm seated height and is offered
in the same package as the now familiar P2781.
The part is completely lead-free and suitable for
lead-free and conventional placement and reflow.

Despite the subminiature size, the performance is
superior to that of much larger components. The
P3191 offers reinforced insulation, is ideal for data
communications at high data rates whilst capable of
being matched to both 600

Ω

and complex

impedance telephone lines.

When used with 600

Ω

lines no external

compensation components are required.

At moderate transmit power levels (e.g. -10dBm)
performance to 33,600 bits/second may be
achieved.

P3191 is certified to IEC 60950 and UL 60950.
P3191 is a UL Recognized Component, and is
supported an IEC CB Test Certificate.

P3191

ETALDOC 590/8

Page 2 of 4

December 2003

SPECIFICATIONS

Electrical

At T = 25ºC and as circuit Fig. 2 unless otherwise stated.

Parameter

Conditions

Min

Typ

Max

Units

Insertion Loss

f = 2kHz

4.5

Frequency response

-3dB LF cutoff
-3dB HF cutoff
200Hz - 4kHz

-
-
-

50
35

-
-

±0.2

kHz

Return Loss

200Hz - 4kHz

Third Harmonic
Distortion

(1)

600Hz -10dBm in line

-93

dBm

Balance

DC - 5kHz
Method TG25

Saturation

Excitation 50Hz
250Vrms.
Output voltage
across line

-
-

10
65

Vrms

Vpeak

Voltage
isolation

(2)

50Hz
DC

3.88

5.5

-
-

kVrms

Operating range:
Functional
Storage

(5)

Humidity

Ambient temperature

-25

–40

-
-
-

+85

+125

ºC
ºC

%R.H.

Lumped equivalent circuit parameters as Fig. 1

DC resistance, R

(3)

Sum of windings

270

340

Ω

Leakage
inductance

∆

5.6

Shunt
inductance Lp

(4)

10mv 200Hz

2.4

Shunt loss Rp

(4)

10mV 200Hz

Ω

Notes

1. Third harmonic typically exceeds other

harmonics by 20dB.

2. Components are 100% tested at 6.5 kVDC.

3. Caution: do not pass DC through windings.

Telephone line current, etc. must be diverted

using choke or semiconductor line hold circuit.

4. At signal levels greater than 100mV, Lp will

increase and Rp will decrease slightly but the

effect is usually favourable to the return loss

characteristic.

5. Excludes shipping materials. Components

are dry-packed and sealed as shipped.

Handle in accordance with IPC/JEDEC

J-STD-033A procedure for components

classified as IPC/JEDEC J-STD-020B Level

5a.

Equivalent Circuit

Fig. 1

IDEAL

1:1

½ L

½ R

P3191

ETALDOC 590/8

Page 3 of 4

December 2003

MATCHING RECOMMENDATIONS

In practice, the 910

Ω

load resistor will connect to a low output impedance TX driver. The 100nF capacitor

should appear in parallel with the 910

Ω

load resistor (rather than in parallel with transformer winding) to

obtain optimum TX flatness to line.

CONSTRUCTION

Dimensions shown are in millimetres (inches).
Geometric centres of outline and pad grid coincide within a tolerance circle of 0.3mm

∅.

Windings may be used interchangeably as primary or secondary.

Recommended Circuit

Fig 2

430

LINE

600

6.8 F

600 MATCH

Ω

EUROPEAN CTR21 COMPLEX MATCH

Recommended Circuit

Fig 3

910

LINE

270

750

100n

15n

150nF

2.2 F

2.54 2.54

13.0 max

(0.51)

9.0 max

(0.36)

7.0 max

(0.28)

(0.1) (0.1)

NOTE:

Dimensions shown are in millimetres (inches)

Dimensions

Fig 3

(0.06)

1.5

1.32

1.77

(0.052)

(0.07)

Tolerance 0.3mm

Terminals electroplated pure tin (Sn) 5 m minimum

Terminal size : 1.5 (0.06) long, 1.32 (0.05) wide

Connections

Fig 4

1
2

P3191

ETALDOC 590/8

Page 4 of 4

December 2003

SAFETY

CERTIFICATION

Manufactured from materials conforming to
flammability requirements of UL94V-0.
Distance through reinforced insulation 0.4mm
minimum.
Creepage and clearances in circuit are 7mm
minimum where PCB pads do not exceed 3mmØ.
Construction complies with IEC

60950-1,

60950-1 and UL

60950-1, reinforced

insulation, 250Vrms maximum working voltage.

ABSOLUTE MAXIMUM RATINGS

(Ratings of components independent of circuit).

Short term isolation voltage (2s)

4.6 kVrms,
6.5kVDC

DC current

100

Storage temperature

-40ºC to
+125ºC

Soldering temperature
Profile peak – either

or
or

240ºC

60s

250ºC

30s

260ºC

10s

Certified by BSI to IEC 60950 Third Edition
(1999) (IEC CB Test Certificate No. GB592W)
sub-clauses 1.5, 1.5.1, 1.5.2, 2.9, 2.9.1, 2.9.2,
2.9.3, 2.9.4, 2.9.5, 2.10, 2.10.1, 2.10.2, 2.10.3,
2.10.3.1, 2.10.3.2, 2.10.4, 2.10.5, 2.10.5.1,
2.10.7, 2.10.8, 4.7, 4.7.3, 4.7.3.1, 4.7.3.4,
(Flammability Class V-0) ,5.2, 5.2.1, and 5.2.2 for
a maximum working voltage of 250Vrms, nominal
mains supply voltage not exceeding 250Vrms
and a maximum operating temperature of +85ºC
in Pollution Degree 2 environment, reinforced
insulation.

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, reinforced
insulation.

UL File number E203175.

Additionally, Profec Technologies certifies all
transformers as providing voltage isolation of
3.88kVrms, 5.5kV DC minimum. All shipments
are supported by a Certificate of Conformity to
current applicable safety standards.standards.

ORDERING CODE

COPYRIGHT

P3191

ÿÿ

TR = Tape and Reel
(Blank) = Bulk in tubes.

Carrier tape width 24mm,
600 parts per 13” reel.

ETAL, P3191 and P2781 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.

T R A N S F O R M I N G T H E F U T U R E

Profec Technologies Ltd., 10 Betts Avenue, Martlesham Heath, Ipswich, IP5 3RH, England

Telephone: +44 (0) 1473 611422

Fax: +44 (0) 1473 611919

Website: www.profec.com

Email: info@profec.co.uk sales@profec.com

FM 25326

ISO 9001

E203175