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CUI Inc

│ SERIES: PDM1-S │ DESCRIPTION: DC-DC CONVERTER

date 03/18/2013

│ page 4 of 6

EMC RECOMMENDED CIRCUIT

Recommended external circuit components

Vin

(Vdc)

C1

LDM

C2

5

4.7μF/50V

6.8μH

NC

12

4.7μF/50V

6.8μH

NC

15

4.7μF/50V

6.8μH

470pF/2kV

24

4.7μF/50V

6.8μH

470pF/2kV

Vin

GND

+Vo

-Vo

(0V)

EUT

LOAD

LDM

C1

C2

Vin

GND

TEST CONFIGURATION

DC

Cin

Lin

DC

Load

Oscilloscope

Current

Probe

Lin(4.7µH)

Cin(220µF, ESR< 1.0Ω at 100KHz)

DERATING CURVES

Note: Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.

External components

Lin

4.7μH

Cin

220μF, ESR < 1.0Ω

at 100 KHz

100

80

60

40

20

Ambient Temperature (°C)

-40-20

0204060

85

105 120

Temperature Derating Curve

Safe operating area

10

20

30

40

50

60

70

80

90

100

10

-10

0

2.5

5

7.5

-2.5

-5

-7.5

Typical Load

Line

Rated Output Voltage

2.5

-2.5

-7.5

Output Current Percentage (%)

(Nominal Input Voltage)

Tolerance Envelope Curve