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L6743BTR Datasheet(PDF) 4 Page - STMicroelectronics

Part # L6743BTR
Description  High current MOSFET driver
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6743BTR Datasheet(HTML) 4 Page - STMicroelectronics

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Pins description and connection diagrams
L6743B
4/16
2
Pins description and connection diagrams
2.1
Pin description
Table 1.
Pin description
Figure 3.
Pins connection (top view)
Pin #
Name
Function
1BOOT
High-side driver supply.
This pin supplies the high-side floating driver. Connect through a
RBOOT - CBOOT capacitor to the PHASE pin.
Internally connected to the cathode of the integrated bootstrap diode. See
Section 5.3 for guidance in designing the capacitor value.
2PWM
Control input for the driver, 5 V compatible.
This pin controls the state of the driver and which external MOSFET have to
be turned-ON according to EN status. If left floating and in conjunction with EN
asserted, it causes the driver to enter the high-impedance (HiZ) state which
causes all MOSFETs to be OFF. See Section 5.1 for details about HiZ.
3EN
Enable input for the driver. Internally pulled low by 15 k
Ω.
Pull high to enable the driver according to the PWM status. If pulled low will
cause the drive to enter HiZ state with all MOSFET OFF regardless of the
PWM status.
See Section 5.1 for details about HiZ.
4VCC
Device and LS driver power supply. Connect to any voltage between 5 V and
12 V. Bypass with low-ESR MLCC capacitor to GND.
5LGATE
Low-side driver output.
Connect directly to the low-side MOSFET gate. A small series resistor can be
useful to reduce dissipated power especially in high frequency applications.
6GND
All internal references, logic and drivers are referenced to this pin. Connect to
the PCB ground plane.
7
PHASE
high-side driver return path. Connect to the high-side MOSFET source.
This pin is also monitored for the adaptive dead-time management and pre-
OV protection.
8UGATE
high-side driver output.
Connect to high-side MOSFET gate.
-TH. PAD
Thermal pad connects the silicon substrate and makes good thermal contact
with the PCB. Connect to the PGND plane.


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