Pins description and connection diagrams

L6743D

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2

Pins description and connection diagrams

Figure 3.

Pins connection (Top view)

2.1

Pin description

Table 2.

Pins descriptions

1

2

3

4

LGATE

GND

PHASE

UGATE

VCC

EN

PWM

BOOT

5

6

7

8

L6743D

Pin #

Name

Function

1BOOT

high-side driver supply.

This pin supplies the high-side floating driver.

Internally connected to the cathode of the integrated bootstrap diode. See

Section 4.3 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 4.1 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 4.1 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.