IWR1642BOOST: information on increase in temperature when sensor is ideal

Hello Vishnu,

          Typically when you wake up the device device will boot up and load the application code from the QSPI flash and start executing it. 

Depending upon application in QSPI flash, application processor (400 MHz ARM processor ) would be executing the code, Also there are clock domain, PLL domain and Some Analog/Mixed signal logics are up and running would consume some amount of power which makes device internal temperate to raise. 

After configuration, depending upon chip configuration device power consumption would get increased and hence temperate raises. Hence even when device is not chirping, there would be some quiescent current and application processor are running which would consume some amount of power and hence there would be increase in the power. 

Apart from this on board components (LDOs) would dissipate and generate heat which increases the board temperature and hence junction temperature raises. With the newer power management scheme these LDOs could be bypassed with the LC filter and system power could be reduced. You could refer to below app-note for the reference.

http://www.ti.com/lit/pdf/spracg5

On the EVM itself if you absolutely want to reduce the temperate, on the back side of the EVM metal is exposed. which could be connected to some sort of heat sinks from which temperature could be reduced.  

Thanks and regards,

CHETHAN KUMAR Y.B.