Datasheet

DS_INLC10AQ Revision 1.0_B

Inova Semiconductors Confidential

Page 25 of 35

4.4

Temperature Detection

For temperature detection, the controller chip provides an analog temperature sensor. This can be read

back via the ADC and the API command digLED_Read_Temp. The return value ADCTemp alone is not

sufficient for detecting the temperature.

The TempOffset parameter, which is used for the electrical calibration of the temperature sensor, must also

be known for this purpose. The value is stored in the eFuse memory of the device and can be read out via

the API command digLED_Read_Param.

Figure 18

– Temperature detection

Parameter

Description

Diagnostic API command

Unit

ADCTemp

ADC temperature value.

Varies vs. junction temperature.

digLED_Read_Temp

digit

TempOffset

Temperature sensor offset value.

Constant calibration value.

Single readout is sufficient.

digLED_Read_Param

digit

Table 23

– Temperature detection parameters

With ADCTemp, TempOffset and the equation of Table 24, the junction temperature of the device can be

determined.

Parameter

Description

Equation

Unit

Tj, det

Detected junction temperature

Tj,det = (TempOffset + 94.57 - ADCTemp) / 0.87

°C

Table 24

– Temperature detection