PYB30 Datasheet, PDF (5/7 Pages) CUI INC – DC-DC CONVERTER

CUI Inc │ SERIES: PYB30 │ DESCRIPTION: DC-DC CONVERTER
date 08/15/2013 │ page 5 of 7
DERATING CURVES
Temperature Derating Curve
With heatsink
100
80
Without heatsink
60
Safe operating area
40
20
-40 -20
0
20
40
60 70 85
Ambient Temperature (°C)
EMC RECOMMENDED CIRCUIT
Vin
GND
Vin
GND
FUSE
Figure 1
Single Output
LDM
LCM
MOV
FU S E
C1
TVS _C0
D
E
Dual Output
LDM
LCM
MOV
TVS _C0
D
C1
E
C3
Vin
+ Vo
C2
EUT LOAD
GND
0V
C4
C3
Vin
+ Vo
LOAD
C2
EUT _0V
GND
C4
LOAD
- Vo
Table 1
Recommended external circuit components
Vin (Vdc)
24
48
FUSE Choose according to input current
MOV
10D560K
10D101K
LDM
56μH
56μH
TVS
SMCJ48A
SMCJ90A
C0
120μF/50V
120μF/100V
C1
4.7μF/50V
2.2μF/100V
LCM
2.2mH
2.2mH
C2
4.7μF/50V
2.2μF/100V
C3^*
1nF/2KV
1nF/2KV
C4^*
1nF/2KV
1nF/2KV
Note: *2nF/2KV capacitors for triple output, 48V input models.
Vin
GND
Triple Output
FUSE
LDM
LCM
MOV
TVS _C0
D
C1
E
C3
Vin
+ Vo 1
+ Vo 2
LOAD
C2
EUT
0V
GND
C4
LOAD
- Vo 2
LOAD
TEST CONFIGURATION
Oscilloscope
Lin
Figure 2
DC DC ^Current
Cin ^Probe
Load
Table 2
External components
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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