LC640.480.21-065 Operations Manual (OM610-00)
30
High Temperature Control
At high temperatures, thermal control is performed by decreasing the maximum duty
cycle of the backlight inverter. See Table 22 and Figure 21 below.
Table 22. High Temperature Control Parameters.
Parameter
Value
Units
Active temperature sensor
Monitor temperature sensor with the highest reading
None
Control
Maximum duty cycle is stepped as shown in Figure 21
%
Hysteresis
3.0
C
Figure 21. Temperature Control: Maximum Pulse Width Modulation Duty Cycle.
SENSOR TEMPERATURE VS MAXIMUM PWM DUTY CYCLE
-10
0
10
20
30
40
50
60
70
80
90
100
110
80
85
90
95
100
105
110
115
120
SENSOR TEMPERATURE (C)
MAXIMUM
P
WM
DUTY
C
YCLE
(%)
