L6376 STMicroelectronics, L6376 Datasheet - Page 10

• Manufacturer Part Number: L6376
• Description: Power Switch ICs - Power Distribution 0.5A Intel Power Sw
• Manufacturer: STMicroelectronics

Specifications of L6376

• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Package / Case: Power PDIP-20
• Mounting Style: Through Hole
• Lead Free Status / Rohs Status: Details

Overtemperature protection (OVT)
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Overtemperature protection (OVT)
If the chip temperature exceeds Θlim (measured in a central position in the chip) the chip
deactivates itself.
The following actions are taken:
●
●
Normal operation is resumed as soon as (typically after some seconds) the chip
temperature monitored goes back below Θ
The different thresholds with hysteretic behavior assure that no intermittent conditions can
be generated.
Undervoltage protection (UV)
The supply voltage is expected to range from 9.5 V to 35 V, even if its reference value is
considered to be 24 V. In this range the device operates correctly. Below 9.5 V the overall
system has to be considered not reliable. Consequently the supply voltage is monitored
continuously and a signal, called UV, is internally generated and used.
The signal is “on” as long as the supply voltage does not reach the upper internal threshold
of the Vs comparator V
Once the UV signal has been removed, the supply voltage must decrease below the lower
threshold (i.e. V
The hysteresis V
voltages that may have a superimposed ripple around the average value.
The UV signal switches off the outputs, but has no effect on the creation of the reference
voltages for the internal comparators, nor on the continuous operation of the charge-pump
circuits.
Diagnostic logic
The situations that are monitored and signalled with the DIAG output pin are:
●
●
●
The diagnostic signal is transmitted via an open drain output (for ease of wired-or
connection of several such signals) and a low level represents the presence of at least one
of the monitored conditions, mentioned above.
all the output stages are switched off;
the signal DIAG is activated (active low).
current limit (OVC) in action; there are 4 individual current limiting circuits, one per each
output; they limit the current that can be sunk from each output, to a typical value of
800 mA, equal for all of them;
under voltage (UV);
over temperature protection (OVT).
sth
shys
-V
shys
is provided to prevent intermittent operation of the device at low supply
sth
) before it is turned on again.
. The UV signal disappears above V
lim
-Θ
H
.
sth
.
L6376