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RPP40-2412SW Datasheet(PDF) 3 Page - Recom International Power

Part # RPP40-2412SW
Description  40 Watt 4:1 Ribbed Style Single Output
PDF  5 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RECOM [Recom International Power]
Direct Link  http://www.recom-international.com
Logo RECOM - Recom International Power

RPP40-2412SW Datasheet(HTML) 3 Page - Recom International Power

  RPP40-2412SW Datasheet HTML 1Page - Recom International Power RPP40-2412SW Datasheet HTML 2Page - Recom International Power RPP40-2412SW Datasheet HTML 3Page - Recom International Power RPP40-2412SW Datasheet HTML 4Page - Recom International Power RPP40-2412SW Datasheet HTML 5Page - Recom International Power  
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DC/DC Converter
RPP-3
REV.: 2/2016
www.recom-power.com
ENVIRONMENTAL
Parameter
Condition
Value
Relative Humidity
95%, non condensing
Temperature Coefficient
±0.04% / °C max.
Thermal Impedance
natural convection, mounting at FR4
(254x254mm) PCB
vertical
horizontal
4.6°C/W
6.4°C/W
Operating Temperature Range
start up at -45°C
-45°C to (see calculation)
Maximum Case Temperature
+115°C
MTBF
according to MIL-HDBK-217F (+50°C G.B.)
according to BellCore-TR-332 (+50°C G.B.)
609 x 103 hours
1541 x 103 hours
continued on next page
Derating Graph
(Ta= +25°C, natural convection, typ. Vin and vertical mounting)
Calculation
Specifications (measured @ ta= 25°C, nominal input voltage, full load and after warm-up)
RPP40-2412SW
Series
0
30
35
40
45
50
55
10 20
30
40
50
60 70
80 90 100
Load (%)
9
50
60
70
80
90
100
12
15
18
21
24
27
30
33 36
Input Voltage (V)
10
50
60
70
80
90
100
20
30
40
50
60
70
80
90 100
9Vin
24Vin
36Vin
Load (%)
R
thcase-ambient = 4.6°C/W (vertical)
T
case
= Case Temperature
R
thcase-ambient = 6.4°C/W (horizontal)
T
ambient
= Environment Temperature
P
dissipation
= Internal losses
R
thcase-ambient =
T
case - Tambient
P
IN
= Input Power
P
dissipation
P
OUT
= Output Power
h
= Efficiency under given Operating Conditions
P
dissipation = PIN - POUT =
P
OUTapp
- P
OUTapp
R
thcase-ambient =
Thermal Impedance
h
Practical Example:
Take the RPP40-2412SW with 50% load. What is the maximum ambient operating temperature? Use converter vertical in application.
Eff
min = 87% @ Vnom
P
OUT = 40W
P
OUTapp = 40 x 0.5 = 20W
P
dissipation =
P
OUTapp
- P
OUTapp
R
th =
T
casemax - Tambient
--> 4.6°C/W =
115°C - T
ambient
h
P
dissipation
2.73W
h = ~88% (from Eff vs Load Graph)
T
ambientmax =
102.4°C
P
dissipation =
20
- 20 = 2.73W
0.88



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