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CUI Inc

│ SERIES: PRMC1-S │ DESCRIPTION: DC-DC CONVERTER

date 03/20/2013

│ page 4 of 6

Recommended external circuit components

Vin (Vdc)

5

12

24

48

FUSE

choose according to practical input current

MOV

TBD

--

10D560

10D101

LDM1

TBD

--

56μH

56μH

TVS

TBD

SMCJ28A

SMCJ48A

SMCJ90A

C0

TBD

680μF/25V

120μF/50V

120μF/100V

C1

TBD

4.7μF/50V

4.7μF/50V

4.7μF/100V

LDM2

TBD

12μH

12μH

12μH

C2

TBD

4.7μF/50V

4.7μF/50V

4.7μF/100V

CY

TBD

1nF

1nF

1nF

D1

TBD

RB160M-60/1A RB160M-60/1A RB160M-60/1A

R

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Cd

47nF/50V

47nF/50V

47nF/50V

47nF/50V

EMC RECOMMENDED CIRCUIT

DERATING CURVES

100

80

60

40

20

Ambient Temperature (°C)

-40-20

0204060

85

105 120

Safe operating area

CY

RL

LDM2

C0

TVS

LDM1

MOV

FUSE

C1

+

Vin

GND

+Vo

0V

EUT

C2

CTRL

Cd

D1

R

CT

Vin

GND

LOAD

(a)

(b)

(c)

10 Sec. Max.

Wave Soldering Time

4 Sec. Max.

Peak Temp. 260°C Max.

Time (sec.)

250

200

150

100

50

0

Wave Soldering Profile

Temperature Derating Curve

300

0

.

1 −

−

−

=

C

D

C

I

V

V

R

Figure 1

TEST CONFIGURATION

DC

Cin

Lin

DC

Load

Oscilloscope

Current

Probe

Lin(4.7µH)

Cin(220µF, ESR< 1.0Ω at 100KHz)

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