1769205x2, 176881212, 176861512

FISM

– Fixed Isolated SMT Module

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Würth Elektronik eiSos GmbH & Co. KG

– Data Sheet Rev. 1.0

©July 2018

11/37

TYPICAL PERFORMANCE CURVES

RADIATED AND CONDUCTED EMISSIONS (WITH EMI INPUT FILTER)

The 176xxxxx2 power module was tested in several EMC configurations to give more realistic information about

implementation in the applications. The test setup is based on CISPR16 with the limit values of CISPR32

FILTER SETUP

– MLCC capacitors

Application specific connection

– Using an MLCC based filter

Input cable length of 80cm, the resistive load is connected close to the output of the power module

3.3V  5V (176920502)

0

10

20

30

40

50

60

70

30

100

1000

Frequency [MHz]

Radiated Emissions 176920502 (3m Antenna Distance)

with input filter 22µF (885012209006) , 2.2µH (744773022)

and 470pF (885362240009)

Horizontal

Vertical

EN55022 Class A limit

EN55022 Class B limit

0

10

20

30

40

50

60

70

0.15

1

10

Frequency [MHz]

Conducted Emissions 176920502

with input filter 22µF (885012209006) , 2.2µH (744773022) and 470pF (885362240009)

EN55022 Class B Quasi Peak limit

EN55022 Class B Average limit

80

-10

30

0.5