P7805-Q12-S2-S 查看數據表（PDF） - CUI INC
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P7805-Q12-S2-S Datasheet PDF : 6 Pages
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CUI Inc │ SERIES: P7805-S │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 02/19/2015 │ page 4 of 6
DERATING CURVES
EMC RECOMMENDED CIRCUIT
Temperature Derating Curve
100
80
60
Safe operating area
40
20
-40 -20
0
20
40
60 71 85 100
Operating Temperature (°C)
V in
Figure 1
GN D
TEST CONFIGURATION
FUSE
L DM1
LDM2
MOV
+
C0
D
C3
E
DC/DC
Vin
+ Vo
GN D
C1
LOAD
C2
Recommended external circuit components
FUSE
choose according to practical input
current
MOV
S10K35
LDM1
82μH
LDM2
12μH
C0
680μF/50V
C3
4.7μF/50V
Note: See External Capacitor Table on page 5 for C1 & C2 values.
Effeciency and Output Voltage Ripple Test
+Vin
C1
GND
25.4mm
25.4mm
12.7mm
1
DC/DC
Converter
3(2)
2(3)
Vout
Copper s trip
1 F 10 F
C2
S cope
Ceramic Tantalum
Copper strip
Start-up and Load Transient Response Test
+Vin
C1
GND
50.8 mm
1
DC/DC
Co n ve rte r
3(2)
2(3)
Vout
Copper strip
C2
Scope
Copper strip
OUTPUT RIPPLE REDUCTION
+ Vin
1
DC/DC
Converte
r3
(
2
)
Vout
L
C1
2(3)
C2
22 F
GND
Note: To reduce ripple, it is recommended to add a LC filter in output port. (L: Recommended parameter 10μH ~ 47 μH)
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