Datasheet

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CUI Inc │ SERIES: PRMC1-S │ DESCRIPTION: DC-DC CONVERTER date 06/02/2014 │ page 4 of 6
Recommended external circuit components
Vin (Vdc) 5 12 24 48
FUSE choose according to practical input current
MOV -- -- S14K35 S14K60
LDM1 -- -- 56μH 56μH
TVS SMCJ13A SMCJ28A SMCJ48A SMCJ90A
C0 680μF/16V 680μF/25V 330μF/50V 330μF/100V
C1 4.7μF/50V 4.7μF/50V 4.7μF/50V 4.7μF/100V
LDM2 12μH 12μH 12μH 12μH
C2 4.7μF/50V 4.7μF/50V 4.7μF/50V 4.7μF/100V
CY 1nF/3kV 1nF/3kV 1nF/3kV 1nF/3kV
D1 RB160M-60/1A RB160M-60/1A RB160M-60/1A RB160M-60/1A
R Follows:aaaaa aaaaaaaaaaaa
Cd 47nF/100V 47nF/100V 47nF/100V 47nF/100V
EMC RECOMMENDED CIRCUIT
DERATING CURVES
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 0204060
85 105 120
Safe operating area
LDM2
C0
TVS
LDM1
MOV
FUSE
C1
+
Vin
GND
+Vo
-Vo
(0V)
EUT
LOAD
C2
CY
Ctrl
Cd
D1
R
Ctrl
Vin
GND

(a) (b) (c)
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
Wave Soldering Prole Temperature Derating Curve
300
0.1
−
−−
=
C
DC
I
VV
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 reected-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
Table 1
Figure 2 Table 2
Note: Figure 1-c is on/off control circuit. See page 6 for details.
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