Datasheet

90E36A POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Function Description 25 April 2, 2013
3.7.5 TRANSITION OF POWER MODES
The above power modes are controlled by the PM0 and PM1 pins. In
application, the PM0 and PM1 pins are connected to external MCU. The
PM0 and PM1 pins have internal RC- filters.
Generally, the 90E36A stays in Idle mode most of the time while out-
age. It enters Detection mode at a certain interval (for example 5s) as
controlled by the MCU. It informs the MCU if the current exceeds the
configured threshold. The MCU then commands the 90E36A to enter
Partial Measurement mode at a certain interval (e.g. 60s) to read related
current. After current reading, the 90E36A gets back to the Idle mode.
The measured current may be used to count energy according to
some metering model (like current RMS multiplying the rated voltage to
compute the power).
Any power mode transition goes through the Idle mode, as shown in
Figure-11.
Figure-11 Power Mode Transition
Normal Mode
Idle Mode
Detection Mode
Partial
Measurement Mode