CHB150 데이터 시트보기 (PDF) - RSG Electronic Components GmbH
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CHB150 Datasheet PDF : 2 Pages
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Application Note
Derating
The operating case temperature range of the CHB100/150 series is -40˚C to +100˚C. When operating the CHB100/150 series,
proper derating or cooling is needed .
Following is the derating curve of CHB100/150 without heat sink.
Power Dissipated vs Ambient Temperature and Air Flow
35
30
25
20
15
10
5
0
0
10
20
30
40
50 60 70
80 90 100
Ambient Temperature, Ta(Deg. C)
Forced Convection Power Derating with No Heat Sink
Where:
The power dissipation (Pd):
Pd = Pi - Po = Po (1- ) /
The thermal resistance are list below:
Chart of Thermal Resistance vs Air Flow:
AIR FLOW RATE
Natural Convection 20ft./min. (0.1m/s)
100 ft./min. (0.5m/s)
200 ft./min. (1.0m/s)
300 ft./min. (1.5m/s)
400 ft./min. (2.0m/s)
500 ft./min. (2.5m/s)
600 ft./min. (3.0m/s)
700 ft./min. (3.5m/s)
800 ft./min. (4.0m/s)
The temperature rise ( T ):
T = Pd * Rca
TYPICAL Rca
7.12 ˚C/W
6.21 ˚C/W
5.17 ˚C/W
4.29 ˚C/W
3.64 ˚C/W
2.96 ˚C/W
2.53 ˚C/W
2.37 ˚C/W
2.19 ˚C/W
85
Natural Convection
20 ft./min. (0.1 m/s)
100 ft./min. (0.5 m/s)
200 ft./min. (1.0 m/s)
300 ft./min. ( 1.5 m/s)
400 ft./min. (2.0 m/s)
500 ft./min. (2.5 m/s)
600 ft./min. (3.0 m/s)
700 ft./min. (3.5 m/s)
800 ft./min. (4.0 m/s)
Remote ON/OFF Control
The CHB100/150 Series allows the user to switch the module on and off electronically with remote on/off feature. The
CHB100/150 Series are available with "positive logic" or "negative logic" (option).
HIGH SIGNAL HERE
DISABLE OUTPUT
ON/OFF (2)
-VIN (4)
Logic State
(Pin 2)
Logic Low -
Switch Closed
Logic High -
Switch Open
Logic Table
Negative Logic
Positive Logic
Module on
Module off
Module off
Module on
External Output Trimming
Output may optionally be externally trimmed
(±10%) with a fixed resistor or an external
trimpot as shown.
+SENSE (8)
TRIM DOWN
TRIM (7)
TRIM UP
-SENSE (6)
+SENSE (8)
TRIM (7)
-SENSE (6)
External Output
10K ohms
TRIMPOT
Output Noise
The output noise is measured with 10µF tantalum capacitor and 1.0µF ceramic capacitor across output.
+Vout (9)
Ceramic
1.0µF
-Vout (5)
Solid Tantalum
10µF
To
Scope
Output Noise Test Circuit schematic
All Specifications Typical At Nominal Line, Full Load and 25˚C Unless Otherwise Noted.
Resistor
Load
86
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