TDK-Lambda GXE600 Series, Instruction Manual

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INSTRUCTION MANUAL
GXE600 Series
TDK­Lambda
<Page>
■ Forced air cooling
Use so that both of A. and B. shall be satisfied.
A : Derating is necessary to output current in case of ambient temperature more than 50°C.
B : Derating is unnecessary to output power in input voltage range 85­265VAC.
For example, in case of input voltage 100VAC and ambient temperature 60°C at 24V model.
According to A. ambient temperature derating, output current limit is 75% (18.75A).­­­ ①
According to B. input voltage derating is unnecessary, output power limit is 600W.­­­ ②
⇒
If Vo=28.8V (max.), the derating is determined by output current (18.75A)
①
.
Because output power is less than 600W (28.8V x 18.75A = 540W).
In forced air condition, the entire components shall be cooled.
Temperature of L2 and L5 need to be less than 85 °C.
As reference, set wind velocity at 1.0m/s (height of space at 50mm. our test condition).
Choke coil allowable Max. temperature
Monitoring point
L2: Top of core case
L5: Side of core
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Allowable Max. temperature
L2 L5
85°C 85°C
L5
L2
Forced air cooling
Ta
(°C)
­20
≦
Ta
≦
+50
70
Input Voltage
(VAC)
85
～
265
100% (600W)
B : Output Power vs. Input Voltage
Output Power
A : Output Current vs. Ta
Forced air cooling
100
50
Output Current (%)
0
20
40
60
80
100
120
­20 ­10 0 10 20 30 40 50 60 70 80
O
ut
p
ut
C
ur
re
nt
(%
)
Ta (
o C
)
0
20
40
60
80
100
120
85 115 145 175 205 235 265
O
ut
p
ut
P
ow
er
(%
)
Input Voltage (VAC)