Pins description L9380
6/18 Doc ID 5853 Rev 4
2 Pins description
Figure 2. Pins connection (top view)
Table 2. Pins function
N°
Pin
name
Function
1T1
Timer capacitor; the capacitor defines the time for the channel 1 shut down, after overload of
the external MOS transistor has been detected.
2V
S
Supply voltage.
4T2
Timer capacitor; the capacitor defines the time for the channel 2 shut down, after overload of
the external MOS transistor has been detected.
5PR
Programming resistor for overload detetcion threshold; the resistor from this pin to ground
defines the drain pin current and the charging of the timer capacitor.
6 IN3 Input 3; equal to IN1.
7 IN2 Input 2; equal to IN1.
8IN1
Input 1; logic signal applied to this pin controls the driver 1; this pin features a current source
to assure defined high status when the pin is open.
9 EN Enable logic signal high on this pin enables all channels
10 GND Ground
11 G3 Gate 3 driver output; current source from CP or ground
12 G2 Gate 2 driver output; current source from CP or ground
14 S2 Source 2 sense input; monitors the source voltage.
15 S1 Source 1 sense input; monitors the source voltage.
16 G1 Gate 1 driver output; current source from CP or ground
17 D2
Drain 2 sense input; a programmable input bias current defines the drop across the external
resistor R
D1
; this drop fixes the overload threshold of the external MOS.
19 D1
Drain 1 sense input; a programmable input bias current defines the drop across the external
resistor R
D1
; this drop fixes the overload threshold of the external MOS.
20 CP
Charge pump capacitor; a alternating current source at this pin charges the connected
capacitor C
CP
to a voltage 10V higher than V
S
; the charge stored in this capacitor is than used
to charge all the three gates of the power MOS transistors.
3, 13, 18 NC Not connected
T1
VS
N.C.
T2
PR
IN2
IN3
IN1
EN G2
N.C.
S2
G1
S1
D2
N.C.
D1
CP1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
GND G3
D98AT391
