Bootstrap driver

L6395

12/16

DocID024048 Rev 2

For example: using a power MOSFET with a total gate charge of 30 nC, the drop on the

Equation 4

this drop is too high, or the circuit topology does not allow a sufficient charging time, an

external diode can be used.

Figure 6. Bootstrap driver with high voltage fast recovery diode

Figure 7. Bootstrap driver with internal charge pump

------------ 120

 0.7V





=

TO LO AD

H.V.

HVG

LVG

C BOOT

D BOOT

BOOT

VCC

OUT

AM16537v1

HVG

LVG

TO LO AD

H. V.

CBO O T

V CC

OUT

BO O T

AM16538v1