Functional descriptions, Am4964 – Diodes AM4964 User Manual
Page 8
AM4964
Document number: DS37241 Rev. 2 - 2
8 of 21
June 2014
© Diodes Incorporated
AM4964
A Product Line of
Diodes Incorporated
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Functional Descriptions
(cont.)
TH
– High Temperature Corner Set Pin
A resistor (R9) is connected between TH and ground to adjust the high corner temperature.
High corner temperature can be estimated by: T
H
=T
L
+5*R
9
/100.
High Temperature Corner vs. R9
TA
– Output Duty Gap Adjust between High and Low Temperature Corners When Input Duty is 100%
A resistor (R7) is connected between TA and ground to adjust the output PWM duty gap between high temperature and low temperature corners
when the external input PWM duty is 100%.
0
100
200
300
400
500
600
700
800
900
1000
0
20
40
60
80
100
Low Temperature
High Temperature
The Gap Between Low and High Temperature
R7 (K
)
O
u
tp
u
t
D
u
ty
C
ycl
e
(%
)
Output PWM Duty vs. R7
40
60
80
100
120
140
160
180
200
220
240
32
34
36
38
40
42
Input Duty Cycle=100%
H
ig
h
C
o
rn
e
r
T
e
mp
e
ra
tu
re
(
o
C)
R9 (k
)