A kind of ir2110 drive circuit and method based on buck-boost converter

Abstract

The invention discloses an IR2110 driving circuit based on a Buck-Boost converter and a method thereof. The driving method includes: providing a delayed high-level signal; Phase-AND of high-level signals; use the output signal after phase-AND as the logic high-side input signal of the IR2110 non-bootstrap drive circuit. The IR2110 drive circuit and method thereof based on the Buck-Boost converter proposed by the present invention introduce a delay time of T to the PWM drive signal of the high-side switch tube. delay The time delay, so that the duration of the high level after the converter is powered on exceeds T delay The PWM driving signal of the high-side switch can be powered on in the converter T delay A rising edge appears after a certain time to realize the normal driving of the high-side switch tube by IR2110. The drive circuit and the drive method proposed by the invention can ensure the normal startup of the converter and free switching between any working modes at any time.

Description

technical field [0001] The invention relates to the technical field of power management of a satellite power supply system, in particular to an IR2110 drive circuit based on a Buck-Boost converter and a method thereof. Background technique [0002] As the core component of the satellite, the main task of the power system is to provide high-quality, high-reliability continuous power for the entire satellite to meet the power requirements of the power load of the entire aircraft. [0003] With the continuous development of aerospace technology, people's requirements for space power systems are further improved. Satellite power systems not only need to achieve high power output, but also in order to improve system stability and energy efficiency, the topology of power converters and their control strategies are proposed. higher requirements. [0004] Because the satellite is affected by the light intensity during operation, the operating voltage of the solar panel changes grea...

AI Technical Summary

Problems solved by technology

[0010] A typical IR2110 non-bootstrap drive circuit can normally drive the low-side switch and the high-side switch in the normally-off or modulating state, but cannot drive the high-side switch in the normally-on state, which will cause the converter to fail When starting in voltage mode, or starting in buck mode, the synchronous tube does not work

The reason for this defect is that the high-side output of IR2110 can normally follow and amplify the logic high-side input signal only after the first rising edge of its logic high-side input signal appears, otherwise the high-side output will be constant low level

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