L6743Q STMicroelectronics, L6743Q Datasheet - Page 4

• Manufacturer Part Number: L6743Q
• Description: IC MOSFET DRIVER HI CURR 10-DFN
• Manufacturer: STMicroelectronics
• Type: High Side/Low Sider

Specifications of L6743Q

• Configuration: High and Low Side, Synchronous
• Input Type: Non-Inverting
• Current - Peak: 2A
• Number Of Configurations: 1
• Number Of Outputs: 2
• Voltage - Supply: 5 V ~ 12 V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Supply Voltage (min): 5 V
• Supply Current: 5 mA
• Maximum Power Dissipation: 2250 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Number Of Drivers: 2
• Flexible Gate-drive: 5V to 12V compatible
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Delay Time: -
• High Side Voltage - Max (bootstrap): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pin description and connection diagrams
2
2.1
Table 2.
4/17
DFN10
PAD
4, 5
7, 8
10
1
2
3
6
9
Pin n
SO-8
1
2
3
4
5
6
7
8
-
Pin description and connection diagrams
Figure 3.
Pin description
Pin description
TH. PAD
PHASE
UGATE
LGATE
BOOT
BOOT
Name
PWM
PWM
GND
VCC
VCC
EN
EN
Pin connection (top view)
High-side driver supply.
This pin supplies the high-side floating driver. Connect through a R
capacitor to the PHASE pin.
Internally connected to the cathode of the integrated bootstrap diode. See
Section 5.3
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
Enable input for the driver. Internally pulled low by 15 kΩ.
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
Device and LS driver power supply. Connect to any voltage between 5 V and 12 V.
Bypass with low-ESR MLCC capacitor to GND.
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.
All internal references, logic and drivers are referenced to this pin. Connect to the
PCB ground plane.
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.
High-side driver output.
Connect to high-side MOSFET gate.
Thermal pad connects the Silicon substrate and makes good thermal contact with
the PCB. Connect to the PGND plane. (DFN10 only)
1
2
3
4
Section 5.1
L6743
for guidance in designing the capacitor value.
for details about HiZ.
8
7
6
5
UGATE
PHASE
GND
LGATE
Section 5.1
Function
BOOT
PWM
VCC
VCC
EN
for details about HiZ.
1
2
3
4
5
L6743Q
10
BOOT
9
8
7
6
L6743, L6743Q
- C
UGATE
PHASE
GND
GND
LGATE
BOOT