TB9051FTG
Ver.1.1 2019-03-14
9 / 49
(2)
PWM function (in the case of Reverse) (EN
:
H, ENB
:
L)
* The mark of a circle shows DMOS Tr which is ON.
Figure 7.1-3 Current flow at the time of PWM function (Reverese)
Note: Some of the functional blocks and circuits in the block diagram may be omitted or simplified for
explanatory purposes.
●
PWM function (Reverse) timing chart (in the case of short brake operation, PWM1 = PWM2 = L)
*D.T (Dead Time): In order to prevent the through current by simultaneous ON of Hi-side Pch Tr and
Lo-side Nch Tr, Pch Tr off and Nch Tr off time (4
μ
s (typ.)) are prepared.
Figure 7.1-4 (1) Timing chart at the time of PWM function (Reverse)
Note: Some of timing charts in this document may be omitted or simplified for explanatory purposes
.
H
L
PWM2
H
L
Pch
ON
OFF
Nch
ON
OFF
Pch
ON
OFF
Nch
ON
OFF
Reverse
D.T
Short brake
D.T
Reverse
Dead
Time
Dead
Time
O
U
T
1
O
U
T
2
PWM1
