Pin information and thermal data

L6747A

4/15

Doc ID 17126 Rev 1

2

Pin information and thermal data

2.1

Pin information

Figure 3.

Pin connection diagram (top view)

Table 2.

Pin descriptions

Pin #

Name

Function

1BOOT

High-side driver supply.

Internally connected to the cathode of the integrated bootstrap diode.

See Section 4.3 for guidance in selecting the capacitor value.

2PWM

Control input for the driver; 5V compatible, internally clamp to 3.3V.

This pin controls the state of the driver and which external MOSFET must be

turned ON according to EN status.

It manages the high-impedance (HiZ) state which sets all the MOSFETs to

OFF if externally set in the HiZ window (see Table 5).

See Section 4.1 for details of HiZ.

3EN

Enable input for the driver; 5V compatible, internally clamp to 3.3V.

Pull high to enable the driver based on the PWM status.

Pull low to enter HiZ state with all MOSFETs OFF, regardless of the PWM

status.

See Section 4.1 for details of HiZ.

4VCC

Device and LS driver power supply.

Connect to any voltage between 5V and 12V.

Bypass with low-ESR MLCC capacitor to GND (1µF typ).

5LGATE

Low-side driver output.

Connect directly to the low-side MOSFET gate. A small series resistor may be

used 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 adaptive dead-time management and pre-OV

protection.

Internal clamp circuitry prevents leakage from this pin in disable conditions.

1

2

3

4

LGATE

GND

PHASE

UGATE

VCC

EN

PWM

BOOT

5

6

7

8