Slow start protection circuit and circuit protection integrated chip

Abstract

The invention discloses a slow start protection circuit, which comprises a protection chip, a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor. According to the slow start protection circuit, the voltage of the voltage input end and the voltage of the control end of the first switch tube can be monitored, so that when the two voltages change, the interior of the slow start protection circuit can make correct opening and closing actions, the protection accuracy is improved, and the opening speed of the switch tube is reduced to a certain extent so as to effectively reduce the influence of the impact currenton components and a system. Correspondingly, the invention further discloses a circuit protection integrated chip.

Description

technical field [0001] The invention relates to the field of server circuit protection, in particular to a slow start protection circuit and a circuit protection integrated chip. Background technique [0002] With the continuous improvement of the reliability requirements of servers and desktop equipment, there is a need to support hot plugging between the adapter and the main board of the power supply. In order to stabilize the power supply of the motherboard, the capacity of the capacitor is increased at the input end. During the hot-swapping process, a large inrush current will appear, which may easily cause bus voltage instability and damage to components, resulting in circuit failure. [0003] The existing slow-start scheme generally controls the ramp-up time of the gate voltage of the MOS transistor by means of RC delay voltage stabilization, so that the MOS transistor is slowly turned on to reduce the effect of the inrush current, but this scheme exists to a certain e...

AI Technical Summary

Problems solved by technology

In order to stabilize the power supply of the motherboard, the capacity of the capacitor will be increased at the input end. During the hot-swapping process, there will be a large inrush current, which will easily cause bus voltage instability and damage to components, resulting in circuit failure.

[0003] The existing slow-start scheme generally controls the ramp-up time of the gate voltage of the MOS transistor by means of RC delay voltage stabilization, so that the MOS transistor is slowly turned on to reduce the effect of the inrush current, but this scheme exists to a certain extent. risk of misuse

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