Dead Time - Infineon ICE2HS01G Application Note

Solve the equation and find
Then is 5kΩ according to Figure 3. According to the definition of over-current protection,
R
eq
=
//
,
R R R
eq ocp
FMIN
Then can be found as 5.6kΩ.
R
ocp
2.3.4

Dead time

The dead time selection should ensure ZVS of two primary-side MOSFET IPA60R199CP at maximum
switching frequency, where the magnetizing current to charge and discharge
magnetizing current at the end of each switching cycle can be calculated as:
+
( * )
V V
=
O ds
I
min
mag
4
L f
p ocp
The required time to charge and discharge the
2
C V
= =
ds innom
T
DEAD
I
min
mag
Then is around 270kΩ according to Figure 4.
R
TD
T
Figure 4 Vs
DEAD
Application Note
=
250
f kHz
ocp
+
( 12 0 1 . * )
N
=
e
−
6
4 * 690 * 10 *
2
2 * 160 *
C V
=
ds innom
. 0
I
min
mag
R
TD
16 5 .
=
. 0 288
A
3
250 * 10
is:
C
ds
−
12
10 * 400
=
440
ns
288
12
is the minimum. The
C
ds
[18]
[19]
2011-07-06