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Method to create a power turn on and turn off sequence without a reset IC or PLD
The power turn on and turn off sequence is becoming more complicated in recent years. THine Electronics’ power solution, however, has made it possible to achieve it easily, contributing to reduction in customers’ total cost of system development.
Power sequence increasingly complicated on boards
However, all LSI presently used in the world are not necessarily unified by this rule. There is even a case that the reverse rule is applied. In fact, the order and timing of turn on/off are different for each LSI.
Usual methods of sequence creation lead to a cost increase
However, among sequence requirements for some LSI, there are cases where customers ask for a specific turn-off timing. To answer to this request, a dedicated sequence IC or reset IC needs to be added, thus presenting a cost-raising factor.
By using a power supply product with an off-delay function, a sequence up to turn-off can be developed at a low cost
This off-delay function sets a time until output becomes off after the ON/OFF (CTL) terminal is switched from “High” to “Low.” The power becomes off in conjunction with the ON/OFF (CTL) terminal, but a delay time until power starts turning off can be created by connecting the off-delay terminal with a condenser.
By using a product that has such a function, it will be possible to simplify the circuit, reduce the number of parts, and shorten the development lead-time.