Diodes AM4963/AM4963R - Manual (Page 13)

Data Sheet
Single Phase Full Wave Direct PWM Motor Driver AM4963/AM4963R
Sep. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
13
0 20 40 60 80 100
0
20
40
60
80
100
V
CC
=12V
T
A
=30 O C
T
A
=38 O C
Ou
tp
ut
D
uty
C
yc
le
(
%
)
Input Duty Cycle (%)
5 6 7 8 9 10
24
26
28
30
32
34
36
38
40
R
T
=TSM2A103F39H1RZ
Low Cor
n
er
T
emperat
ure (
0
C)
R8 (k Ω )
40 60 80 100 120 140 160 180 200 220 240
32
34
36
38
40
42
Input duty cycle=100%
T
L
=30 0 C
Hig
h Co
rner Temperature (
O
C)
R9 (k Ω )
28 30 32 34 36 38 40
0
20
40
60
80
100
Input duty cycle=20%
Input duty cycle=50%
Input duty cycle=70%
Input duty cycle=100% Output D
uty C
ycle
(%)
T
A
( O C)
T
H
T
L
Typical Application (Note 4, Continued)
Note 4: Some typical performance curves of applications based on circuits above (Figure 10, 11) are shown as
below (R1 to R6 open, R8=8k
Ω, R9=150kΩ).
Figure 12. Output Duty Cycle vs. Input Duty Cycle Figure 13. Output Duty Cycle vs. T
A
Figure 14. Low Corner Temperature vs. R8 Figure 15. High Corner Temperature vs. R9 (Note 5)
Note 5:
1) Low corner temperature (T
L
) is set by thermal resistor R
T
and R8; R
T
=R8 when at temperature T
L.
2) High corner temperature (T
H
) can be expressed as: T
H
≈T
L
+5*R9/100k.
3) First, set T
L
, then T
H
.