Pin connections L6376
4/18
2 Pin connections
Figure 2. Pin connections (top view)
Table 3. Pin description
N# Pin name Function
6V
S
Positive supply voltage. An internal circuit, monitoring the supply voltage,
maintains the IC in OFF-state until V
S
reaches 9 V or when V
S
falls under
8.5 V. The diagnostic is availlable since V
S
= 5 V.
7V
CP
Switch driver supply. To minimize the output drop voltage, a supply of about
10 V higher than V
S
is required. In order to use the built-in charge pump,
connect a filter capacitor from pin1 to pin. The suggested value assures a
fast transition and a low supply ripple even in worse condition. Using the
four channels contemporarily, values less than 68 nF have to be avoided.
2, 3, 8, 9
O
1
, O
2
,
O
3
, O
4
High side outputs. Four independently controlled outputs with built-in current
limitation.
1, 10,
11, 20
GND
Ground and power dissipating pins. These pins are connected to the bulk
ground of the IC, so are useful for heat dissipation.
12,13,
14, 15
I
1
, I
2
, I
3
, I
4
Control inputs. Four independent control signals. The output is held OFF
until the voltage at the corresponding input pin reaches 1.35 V and is turned
OFF when the voltage at the pin goes below 1.15 V.
16 ON DELAY
Programmable ON duration in short circuit. If an output is short circuited to
ground or carryng a current exceeding the limit, the output is turned OFF
and the diagnostic activation are delayed. This procedure allows the driving
of hard surge current loads. The delay is programmed connecting a
capacitor (50 pF to 15 nF) versus ground with the internal time constant of
1.28 µs/pF. The function can be disabled short circuiting this pin to ground.
17
OFF
DELAY
Programmable OFF duration in short circuit. After the short circuit or
overcurrent detection, the switch is held OFF before the next attempt to
switch on again. The delay is programmed connecting a capacitor (50 pF to
15 nF) versus ground with the internal time constant of 1.28 µs/pF. Short
circuiting this pin to ground the OFF delay is 64 times the ON delay.
18 R
Asyncronous reset input. This active low input (with hysteresis), switch off all
the outputs independently from the input signal. By default it is biased low.
GND
O1
I1
O3
VP
V
S
VC
VCP
O2
O4
GND 10
8
9
7
6
5
4
3
2
13
14
15
16
17
19
18
20
12
1
11
GND
D95IN217
I2
I3
ON DELAY
I4
OFF DELAY
R
DIAG
GND
