A low-power control port that prevents misoperation

Abstract

The invention discloses a low-power consumption control port for preventing misoperation. When the potential of the control port is high, the thousand-ohm level pull-down resistor is disconnected from the control port through a switch tube, thereby reducing the power consumption at the moment of normal operation; When the port is at low potential, turn on the switch tube and connect the thousand-ohm level pull-down resistor to the control port to achieve fast pull-down and prevent interference signals from falsely starting the control port. , within a period of tens of us level, keep a thousand-ohm level pull-down resistor connected to the control port to avoid interference from interference signals to the high-impedance control port and cause false start. Start the internal circuit when the control port is at high level, and the control port is at low power. Usually close the internal circuit.

Description

technical field [0001] The invention relates to power management of integrated circuits, in particular to a low power consumption control port for preventing misoperation. Background technique [0002] As portable electronic products are widely used in all aspects of work and life, higher requirements are placed on the power supply, and the ability to minimize quiescent current (IQ) is a key factor in reducing power consumption and managing battery life. To better understand the important role of reducing IQ in prolonging battery life, we can focus on low-power IoT applications, such as smart door locks. By carefully optimizing the power management module with low static power consumption, battery life can be improved from Extended from two years to more than five years. [0003] A problem with current products utilizing one or more dedicated control ports is that once the product becomes fully controllable after initial power-up, current continues to be drawn and thus wast...

AI Technical Summary

Problems solved by technology

[0003] The problem with current products that use one or more dedicated control ports is that once the product becomes fully controllable after initial power-up, current continues to be drawn and thus wasted through one or more dedicated power-up control circuits

In the circuits shown in Figure 1(a) and Figure 1(b), the enable control port controls the switch of the LDO circuit. Figure 1(a) and Figure 1(b) use resistors and current sources as Pull-down power, after enabling and turning on the LDO circuit, the current of the port continues to consume, which is not conducive to the long standby time requirements of low-power applications such as the Internet of Things

At the same time, if the pull-down power of the port is removed, the port will be vulnerable to external interference and switch by mistake in the suspended state, thus consuming current

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