P7805-S Datasheet, PDF (4/6 Pages) CUI INC – NON-ISOLATED SWITCHING REGULATOR

CUI Inc │ SERIES: P7805-S │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR
date 03/20/2013 │ page 4 of 6
DERATING CURVES
EMC RECCOMENDED CIRCUIT
Temperature Derating Curve
100
80
60
Safe operating area
40
20
-40 -20
0
20
40
60 71 85 100
Operating Temperature (°C)
Figure 1
V in
GND
FUSE
LDM1
LDM2
1
+
MOV
TVS _C0
C3
C1
(a)
(b)
EUT
2
3
C2
Vout
GND
TEST CONFIGURATION
Recommended external circuit
components
FUSE
choose according to
practical input current
MOV
10D560
LDM1
82μH
TVS
SMCJ36A
C0
120μF/50V
C3
4.7μF/50V
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)
cui.com