Pin connection L6384E
6/18 DocID13862 Rev 3
3 Pin connection
Figure 2. Pin connection (top view)
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Table 4. Pin description
No. Pin Type Function
1 IN I
Logic input: it is in phase with HVG and in opposition of phase with LVG. It is compatible
to V
CC
voltage. (V
il Max
= 1.5 V, V
ih Min
= 3.6 V).
2 V
CC
P Supply input voltage: there is an internal clamp [typ. 15.6 V].
3 DT/SD I
High impedance pin with two functionalities. When pulled lower than V
dt
(typ. 0.5 V), the
device is shut down. A voltage higher than V
dt
sets the deadtime between the high-side
gate driver and low-side gate driver. The deadtime value can be set forcing a certain
voltage level on the pin or connecting a resistor between the pin 3 and ground. Care
must be taken to avoid below threshold spikes on the pin 3 that can cause undesired
shutdown of the IC. For this reason the connection of the components between the pin 3
and ground has to be as short as possible. This pin can not be left floating for the same
reason. The pin has not be pulled through a low impedance to V
CC
, because of the drop
on the current source that feeds R
dt
. The operative range is: V
dt
… 270 K I
dt
, that
allows a dt range of 0.4 - 3.1 s.
4 GND P Ground
5 LVG O
Low-side driver output: the output stage can deliver 400 mA source and 650 mA sink
(typ. values). The circuit guarantees 0.3 V max. on the pin (at I
sink
= 10 mA) with
V
CC
> 3 V and lower than the turn-on threshold. This allows to omit the bleeder resistor
connected between the gate and the source of the external MOSFET normally used to
hold the pin low; the gate driver ensures low impedance also in SD conditions.
6 V
OUT
P
High-side driver floating reference: layout care has to be taken to avoid below ground
spikes on this pin.
7 HVG O
High-side driver output: the output stage can deliver 400 mA source and 650 mA sink
(typ. values). The circuit guarantees 0.3 V max. between this pin and V
OUT
(at I
sink
= 10 mA) with V
CC
> 3 V and lower than the turn-on threshold. This allows to omit
the bleeder resistor connected between the gate and the source of the external MOSFET
normally used to hold the pin low; the gate driver ensures low impedance also in SD
conditions.
8 V
BOOT
P
Bootstrap supply voltage: it is the high-side driver floating supply. The bootstrap capacitor
connected between this pin and the pin 6 can be fed by an internal structure named
“bootstrap driver” (a patented structure). This structure can replace the external
bootstrap diode.
