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PRODUCT SPECIFICATION 1 (5)

Prepared (also subject responsible if other) No.

MICMALE 3/1301-BMR 603 1203/1 Uen

Approved Checked Date Rev Reference

EAB/FJB/GKF (Natalie Johansson) (MICANWO)

2008-09-05 C

EMC Specification

Conducted EMI measured according to EN55022, CISPR 22

and FCC part 15J (see test set-up). See Design Note 009 for

further information. The fundamental switching frequency is

510 kHz for

BMR 603 1203/1 @ V

= 53 V, max I

Conducted EMI Input terminal value (typ)

EMI without filter

External filter (class B)

Required external input filter in order to meet class B in

EN 55022, CISPR 22 and FCC part 15J.

Filter components:

C1,2,3 = 1 μF

C4 = 100 μF

L1,2 = 10 μH

EMI with filter

Test set-up

Layout recommendation

The radiated EMI performance of the DC/DC converter will

depend on the PCB layout and ground layer design.

It is also important to consider the stand-off of the DC/DC

converter.

If a ground layer is used, it should be connected to the output

of the DC/DC converter and the equipment ground or

chassis.

A ground layer will increase the stray capacitance in the PCB

and improve the high frequency EMC performance.

Output ripple and noise

Output ripple and noise measured according to figure below.

See Design Note 022 for detailed information.

Output ripple and noise test setup

-Vin

DC-DC

C1 C2 C3 C4

L1 L2

-Vin

DC-DC

C1 C2 C3 C4

L1 L2

BMR 603 1203/1

DC/DC converters, Input 40-72 V, Output 78/-52/-33 V/32W

EN/LZT 146 393 R1E September 2008

Technical Speciﬁcation

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