Datasheet

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CUI Inc │ SERIES: PQMC1-S │ DESCRIPTION: DC-DC CONVERTER date 10/14/2014 │ page 4 of 6
EMC RECOMMENDED CIRCUIT
TEST CONFIGURATION
Note: Inputreected-ripplecurrentismeasuredwithaninductorLinandCapacitorCintosimulatesourceimpedance.
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/100V 4.7μF/100V
LDM2 12μH 12μH 12μH 12μH
C2 4.7μF/50V 4.7μF/50V 4.7μF/50V 4.7μF/100V
CY 1nF/2kV 1nF/2kV 1nF/2kV 1nF/2kV
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
300
0.1
−
−−
=
C
DC
I
VV
R
Figure 1
Table 1
Note:Figure1-cison/offcontrolcircuit.Seepage5fordetails.
DC
Cin
Lin
DC
Load
Oscilloscope
Current
Probe
Lin(4.7µH) Cin(220µF, ESR<1. 0Ω at 100KHz)
External components
Lin 4.7μH
Cin
220μF,ESR<1.0Ω
at 100 kHz
Figure 2 Table 2
100
80
60
40
20
Ambient Temperature (°C)
Load (%)
-40-20 0204060
85 105 120
Safe operating area
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
DERATING CURVES
CY
RL
LDM2

C0
TVS
LDM1
MOV
FUSE
C1
+
Vin
GND
+Vo
-Vo
(0V)
EUT
C2
CTRL
Cd
D1 R
CT
Vin
GND
LOAD
(a)
(b)
(c)
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