AN994

L6388E

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L6388E

The L6388E (see Figure 11) is based on the structure of the L6385E. It has two separate

inputs that are 3.3-V compatible, a fixed dead time of approximately 320 ns and an

interlocking function to avoid both power switches from being unintentionally switched on at

the same time (seeTable 5).

The L6388E can be evaluated using the L6385E board.

Table 6.

L6388E pin description

N.

Name

Type

Function

1

I

2

I

3

4

GND

Ground

5

LVG

O

Low-side driver output. The output stage can deliver a 400 mA source and a 650 mA sink

3 V and lower than the turn-on threshold. This removes the need for the bleeder resistor

connected between the gate and the source of the external MOSFET normally used to hold the

pin low.

6

VOUT

O

High-side driver floating reference. Attention should be paid to the layout design of the power

stage so as to limit below-ground spikes on this pin.

7HVG

O

High-side driver output. The output stage can deliver a 400 mA source and a 650 mA sink

resistor connected between the gate and the source of the external MOSFET normally used to

hold the pin low.

fed by an internal structure named "bootstrap driver" (a patented structure). This structure can

replace the external bootstrap diode.

1.

The pull-down internal resistor is typically some hundred k

Ωs.