L6384E 데이터 시트보기 (PDF) - STMicroelectronics
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L6384E Datasheet PDF : 17 Pages
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L6384E
2
Pin connection
Pin connection
Figure 2. Pin connection (Top view)
IN
VCC
DT/SD
GND
1
8
2
7
3
6
4
5
D97IN519
VBOOT
HVG
VOUT
LVG
Table 4. Pin description
N°
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 VCC voltage. [Vil Max = 1.5V, Vih Min = 3.6V]
2
Vcc
Supply input voltage: there is an internal clamp [Typ. 15.6V]
High impedance pin with two functionalities. When pulled lower than Vdt
[Typ. 0.5V] the device is shut down. A voltage higher than Vdt sets the
dead time between high side gate driver and low side gate driver. The
dead time value can be set forcing a certain voltage level on the pin or
connecting a resistor between pin 3 and ground. Care must be taken to
3 DT/SD I avoid below threshold spikes on pin 3 that can cause undesired shut down
of the IC. For this reason the connection of the components between 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 VCC, because of the drop on the current source that feeds Rdt. The
operative range is: Vdt....270K ⋅ Idt, that allows a dt range of 0.4 - 3.1µs.
4
GND
Ground
Low Side Driver Output: the output stage can deliver 400mA source and
650mA sink [Typ. Values]. The circuit guarantees 0.3V max on the pin (@
5
LVG
O
Isink = 10mA) with VCC > 3V 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
Vout
O
High Side Driver Floating Reference: layout care has to be taken to avoid
below ground spikes on this pin.
High Side Driver Output: the output stage can deliver 400mA source and
650mA sink [Typ. Values]. The circuit gurantees 0.3V max between this pin
7
HVG
O
and Vout (@ Isink = 10mA) with VCC > 3V 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 Vboot
Bootstrap Supply Voltage: it is the high side driver floating supply. The
bootstrap capacitor connected between this pin and pin 6 can be fed by an
internal structure named "bootstrap driver" (a patented structure). This
structure can replace the external bootstrap diode.
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