KMP_782485C [MURATA]

ADM2485 Compatible Converter Transformers; ADM2485兼容的转换器变压器


型号：	KMP_782485C
厂家：	muRata
描述：	ADM2485 Compatible Converter Transformers ADM2485兼容的转换器变压器变压器转换器
文件：	总2页 (文件大小：109K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

782485 Series

ADM2485 Compatible Converter Transformers

SELECTION GUIDE

Nominal Input

Nominal

Output Voltage

Max. Output

Current

Isolation

Voltage

Turns

Ratio

Package

Style

Voltage

Order Code

200

V^RMS

2500

782485/35C

782485/55C

3.3

6.0

1CT:2.2CT

1CT:1.5CT

DIL

5.0

CHARACTERISTICS 782485/35C

782485/35C

782485/55C

Parameter

Conditions

Units

Typ.

234

168

Max.

Typ.

Max.

FEATURES

ꢀRoHS compliant

Primary Inductance, L_P

100kHz, 10mV

<0.1VDC

513

192

μH

Leakage Inductance, L_L

Interwinding Capacitance, C_WW

Primary DC Resistance, R_DC

Volt-time Product, Et¹

ꢀ

Analog Devices ADM2485 compatible

2.5kVrms isolation

273

500

383

600

mΩ

Vμs

5kHz, 5V

ꢀIndustry-standard pinout

ꢀUL 94 V-0 package materials

ꢀLow proﬁle

ABSOLUTE MAXIMUM RATINGS

Operating free air temperature range

Storage temperature range

-40°C to 85°C

-50°C to 125°C

2.5kVrms

Isolation voltage (ﬂash tested for 1 second)

ꢀToroidal construction

SOLDERING INFORMATION²

Peak wave solder temperature

Pin ﬁnish

ꢀ

Fully encapsulated

300˚C for 10 seconds

Matte tin

Industrial temperature range

Surface mount versions available soon

Recommended by Analog Devices, Inc.

Speciﬁcations typical at T_A= 25°C

Where pulse applied across pins 1 and 2.

For further information, please visit www.murata-ps.com/rohs

ꢀBackward compatible with

Sn/Pb soldering systems

TECHNICAL NOTES

ISOLATION VOLTAGE

REPEATED HIGH-VOLTAGE ISOLATION TESTING

‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Voltage’, ‘Proof Volt-

age’, ‘Dielectric Withstand Voltage’ & ‘Isolation Test Voltage’ testing of a barrier component can actually degrade

It is well known that repeated high-voltage isolation

DESCRIPTION

The 782485 series of converter transformers are

speciﬁcally designed for use with Analog Devices

chipsets to provide isolated RS-485 and RS-422

interfaces. Carefully controlled turns ratios

ensure consistent performance whilst a toroidal

construction minimises EMI.

are all terms that relate to the same thing, a test voltage,

applied for a speciﬁed time, across a component designed

to provide electrical isolation, to verify the integrity of that

isolation.

isolation capability, to a lesser or greater degree

depending on materials, construction and environ-

ment. This series has toroidal isolation transformers,

with no additional insulation between primary and

secondary windings of enameled wire. While parts

can be expected to withstand several times the

stated test voltage, the isolation capability does de-

pend on the wire insulation. Any material, including

this enamel (typically polyurethane) is susceptible

to eventual chemical degradation when subject to

very high applied voltages thus implying that the

number of tests should be strictly limited. We there-

fore strongly advise against repeated high voltage

isolation testing, but if it is absolutely required, that

the voltage be reduced by 20% from speciﬁed test

voltage.

All products in this series are 100% production tested at

their stated isolation voltage.

A question commonly asked is, “What is the continuous

voltage that can be applied across the part in normal opera-

tion?”

For a part holding no speciﬁc agency approvals both input

and output should normally be maintained within SELV limits

i.e. less than 42.4V peak, or 60VDC. The isolation test volt-

age represents a measure of immunity to transient voltages

and the part should never be used as an element of a safety

isolation system. The part could be expected to function cor-

rectly with several hundred volts offset applied continuously

across the isolation barrier; but then the circuitry on both

sides of the barrier must be regarded as operating at an

unsafe voltage and further isolation/insulation systems must

form a barrier between these circuits and any user-acces-

sible circuitry according to safety standard requirements.

This consideration equally applies to agency recog-

nized parts rated for better than functional isolation

where the wire enamel insulation is always supple-

mented by a further insulation system of physical

spacing or barriers.

ꢀ

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com

Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232

KMP_782485C_A03 Page 1 of 2

782485 Series

ADM2485 Compatible Converter Transformers

PACKAGE SPECIFICATIONS

MECHANICAL DIMENSIONS

RECOMMENDED FOOTPRINT DETAILS

9.77

(0.385) Max.

TOP VIEW

Primary Secondary

2.54 (0.10)

9.14

(0.360) Max.

782485/35C

XYYWW

+0.15 (0.006)

-0.00 (0.000)

Ø1.20 (0.05)

6.35

(0.25)

3.44 0.50

(0.135 0.02)

0.30(0.012)

0.20(0.008)

0.6 (0.024)

10.16 0.40

(0.40 0.016)

2.54

(0.1)

Unless otherwise stated all dimensions in mm (inches) 0.25 (0.01).

All pins on a 2.54 (0.1) pitch and within 0.25 (0.01) of true position.

Package Weight 1.0g TYP.

Unless otherwise stated all dimensions in mm (inches) 0.25 (0.01).

All pins on a 2.54(0.1) pitch and within 0.25(0.01) of true position.

TUBE OUTLINE DIMENSIONS

10.65 - 11.65

(0.419 - 0.459)

Unless otherwise stated all

dimensions in mm (inches)

0.25 (0.01).

4.00 (0.16)

Tube length: 500 2 (19.7 0.08)

Tube quantity: 50

Tube material: Antistatic coated

clear PVC.

0.60 0.15

(0.024 0.006)

12.95

(0.51)

5.20 (0.21)

3.80

(0.15)

15.70 (0.62)

USA:

Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com

UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com

Mansﬁeld (MA), Tel: (800) 233 2765, email: sales@murata-ps.com

Murata Power Solutions, Inc.

11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 U.S.A.

Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356

France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com

Germany: München, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com

Japan: Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com

Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com

Website: www.murata-ps.jp

www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED

Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Speciﬁcations are subject to change without

China:

Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com

Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com

notice.

www.murata-ps.com

Technical enquiries - email: mk@murata-ps.com, tel: +44 (0)1908 615232

KMP_782485C_A03 Page 2 of 2

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