PQM3-M Datasheet, PDF (4/6 Pages) CUI INC – DC-DC CONVERTER

CUI Inc │ SERIES: PQM3-M │ DESCRIPTION: DC-DC CONVERTER
date 03/19/2013 │ page 4 of 6
DERATING CURVES
Reflow Soldering Profile
250
245
Peak .Temp 245_˚C( Max.)
217
200
60 Sec Max
( >217_˚C)
150
100
50
0
Time (sec.)
EMC RECOMMENDED CIRCUIT
Temperature Derating Curve
100
80
60
Safe operating area
40
20
-40 -20
0
20
40
60
85
Ambient Temperature (°C)
105 120
Figure 1
+INPUT
-INPUT
FUSE
LDM1
L D M2
MOV
+
C1
TVS _C0
(a)
(b)
C3
VIN
+Vo
C2
EUT LOAD
GND
0V
C4
Recommended external circuit components
Vin (Vdc)
12
24
48
FUSE
choose according to practical input current
MOV
TBD
10D560
10D101
LDM1
TBD
56μH
56μH
TVS
TBD
SMCJ48A
SMCJ90A
C0
TBD
120μF/50V
120μF/100V
LDM2
TBD
12μH
12μH
C1
TBD
475K/50V
475K/100V
C2
TBD
475K/50V
475K/100V
C3
TBD
--
--
C4
TBD
--
--
TEST CONFIGURATION
Oscilloscope
Lin
DC DC ^Current
Cin Probe
Load
External components
Lin
4.7μH
Cin
220μF, ESR < 1.0Ω
at 100 KHz
Lin(4.7µH) Cin(220µF, ESR < 1.0Ω at 100 KHz)
Note: Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
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