L6599A

Application information

Doc ID 15308 Rev 7

29/35

Equation 13

MOSFET with a total gate charge of 30 nC, the drop on the bootstrap driver is about 3 V at a

switching frequency of 200 kHz:

Equation 14

If a significant drop on the bootstrap driver is an issue, an external ultra-fast diode can be

F

on

)

DS

(

e

arg

ch

g

F

on

)

DS

(

e

arg

ch

Drop

V

R

T

Q

V

R

I

V

+

=

+

=

V

7

.

2

6

.

0

150

10

27

.

0

10

5

.

2

10

30

V

6

6

9

Drop

=

+

⋅

−

⋅

⋅

=

−

−

−