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Current limitation;
Shorted load protection;
Under-voltage shutdown;
Protection against loss of ground;
Very low stand-by current;
Compliance with 6100-4-4 IEC test up to 4.4kV. |
VN808 internal
block diagram |
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VN808
Electrical Characteristics |
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| VCC
[V] |
VDSS
[V] |
RDS(on)
[mOhm] |
IOUT
[A] |
| 10.5 to 36 |
41 |
8 x 150 |
0.7 |
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The VN808 has built-in junction over-temperature protection
which is thermally independent for each of the eight
channels, it has a current limitation (1.1A typical),
and a fast demagnetization block clamped at –52V
typical. Thanks to the built-in protection each channel
is self-protected against load short-circuiting and
overloading. The device is able to manage large inductive
loads, however care must be taken of the power
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dissipation related to the switching frequency in free-wheeling
conditions. Both under-voltage protection and loss of
ground protection with shutdown are added. For the very
first time a case over-temperature protection is integrated
into the VIPower switch. The typical RDS(on)
of the VN808 is 150mOhm per channel at 25°C, while
the operating voltage is inside the industrial range
of 10.5V to 45V.
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Double integrated thermal protection exists in VN808 in the form
of:
Junction temperature
detection (TTSD) and protection, related to the single channel;
Case temperature
detection (TCSD) and protection, related to the whole device dissipation.
The case temperature protection avoids PCB degradation if a large
number of channels are overloaded. In fact the TCSD acts only
on the overloaded channel; channels that are not overloaded continue
to operate normally.
VN808 in a typical programmable logic controller application
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VN808 Product
Page
