Diodes AM4962 - Manual (Page 13)

Data Sheet
SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962
Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
13
0 10 20 30 40 50 60 70 80 90 100
0
20
40
60
80
100
R3=390k, R1, R2, R4, R5, R6 Open
R3=1M, R1, R2, R4, R5, R6 Open
R1, R2, R3, R4, R5, R6 Open
O
u
tp
u
t D
u
ty
C
y
c
le
(
%
)
PWM (%)
0 10 20 30 40 50 60 70 80 90 100
0
20
40
60
80
100
R4=150k, R1, R2, R3, R4, R6 Open
R4=390k, R1, R2, R3, R5, R6 Open
R1, R2, R3, R4, R5, R6 Open
O
u
tp
u
t D
u
ty
C
y
c
le
(
%
)
PWM (%)
Typical Application (Note 4, Continued)
Adjust maximum duty of output PWM:
1. The default maximum output PWM duty is 100% (application circuit 1).
2. Adding R3 can decrease maximum output PWM duty (see Figure 16).
3. Adding R4 can increase maximum output PWM duty (see Figure 17).
Figure 16 Figure 17