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Registers 135, 136, 137, 138 and 140, page 03h are used to control thermal spots over I2C. They
are 8-bit data wide registers.
The consumed power changes accordingly when the values of these registers are changed (only
in high power mode). In Low power mode the module automatically turns off all power spots.
The values written in these registers are permanently stored.
The control registers of the thermal spots are shown in the table below:
Power Spot
Register
Bit
Power Consumption
Control Type
Memory Type
1
135
7:0
1.2 W
PWM
RW (NVR)
2
140
0
1.2 W
ON/OFF
3
136
7:0
2 W
PWM
4
140
1
1.2 W
ON/OFF
5
137
7:0
1.6 W
PWM
6
138
7:0
2 W
PWM
7
140
2
2 W
ON/OFF
8
140
3
2.8 W
ON/OFF
9
140
4
4.7 W
ON/OFF
10
140
5
4.7 W
ON/OFF
8.6
Cut-OFF Temperature
To avoid overheating the module, a Cut-Off Temperature is pre-defined.
The module is continuously monitoring the temperature and checking its value against the Cut-
Off temperature. Once the module temperature reaches the cut-off temperature, all power spots
will automatically turn off in order to prevent overheating. Once the temperature is 5 degrees
below cut-off value, the PWM goes back to its previous value.
The maximum Cut-Off temperature for the ML4062-TL2a is 100 ̊C and it can be programmed to
any value from register 134 of memory page 3. Its default value is 100 ̊C.
