MC33565D Просмотр технического описания (PDF) - ON Semiconductor
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MC33565D Datasheet PDF : 12 Pages
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MC33565
5.5 V and provides an output current up to 200 mA. The
demonstration board layout (Silk Screen and Top Layers)
are shown in Figures 26 and 27, respectively.
Current Limit and Thermal Shutdown
The MC33565 incorporates current limit and thermal
shutdown to protect the device during fault conditions. If the
device detects a current limit or short circuit condition,
typically 730 mA, the device limits the drive to the internal
regulator. Thermal shutdown protects the internal circuitry
in the event that maximum junction temperature is
exceeded. When activated, typically at 170°C, the output is
disabled. There is no hysteresis built into the thermal
3.3 V
limiting circuit. As a result, if the device is overheating, the
output will appear to be oscillating. This feature is provided
to prevent catastrophic failures from accidental device
overheating. It is not intended to be used as a substitute
for proper heatsinking.
Please consider that the thermal resistance values
provided in the maximum ratings table will vary depending
on pad size, adjacent components and air flow. If you are
planning to operate the device close to its maximum junction
temperature it is recommended that you measure the device
temperature in your application to insure junction
temperature is not exceeded.
MGSF1P02ELT
D
S
G
Motherboard/ 5 V
Mainboard
PCI Slot
C2
10 µF
C1
0.1 µF
Main Input
1
C3
NC
0.1 µF
2
Auxiliary Input
3
Gnd
4
8
7
MC33565
6
5
Drive Output
Regulator Output
Sense Input
NC
C4
10 µF
C5
0.1 µF
Figure 24. Application Board Schematic (See Figures 26 and 27)
PCI NIC
Card Circuitry
5 V or 3.3 V Input
Main Input
1
NC
2
NC
3
Gnd
4
8
7
MC33565
6
5
Drive Output
Regulator Output
Sense Input
NC
2 kW
2 kW
50 µF
4
2
10 µF
3
P/2
5, 6
Vout
1
4.7 µF
N/2
7, 8
MTDF1C02HD
Figure 25. Alternative Application: 5.0 V or 3.3 V Card
Input with Hot Swap Circuitry
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