In the previous article "Sequence Operation at Power Turn-on" in Power Supply Sequence Specification ① was explained. Here, sequence operation at power shutoff is explained.
Power Supply Sequence Specification①：Sequence Operation at Power Shutoff
As explained previously, in the sequence for Specification ① the outputs of the three power supply systems for 1.2 V, 3.3 V, and 1.5 V are turned on in order and shut off in the reverse order. In succession to the sequence at power turn-on of the previous article, the sequence operation at power shutoff is explained. Power is shut off in the order 1.5 V, 3.3 V, 1.2 V. In this explanation, the operation in which the 1.5 V power is shut off is called the first stage, the 3.3 V shutoff operation is the second stage, and the 1.2 V shutoff operation is the third stage. In diagrams of each of the stages, the part relevant to the explanation is shown in red.
●Operation for first-stage power shutoff
●Operation for second-stage power shutoff
・In sequence ①, power supplies with three supply voltages are turned on in order, and shut off in the reverse order.
・In order to facilitate understanding of sequence operations, the operations at power shutoff for each of the three power supply systems were illustrated in terms of three stages.