Load capacitor driver and driving method thereof

Abstract

The invention provides a load capacitor driver and a driving method thereof. An inductor is used to drive a load capacitor in multiple steps for charging. As multi-step driven charging is approximate to constant-current charging, less power is consumed by a parasitic resistor connected in series into current loop in the charging process, and the efficiency is improved. As a small inductor can be used in multi-step driven charging, the inductor is of a smaller size and can even be integrated with an integrated circuit. Because of short current establishment time of the small inductor, higher driving speed is achieved. According to the invention, a load capacitor can be driven quickly and efficiently, and meanwhile, less inductance is needed, the cost is saved, and the size is reduced. On-chip integration of an inductor is made possible, the cost is saved further, and the size of the driver is reduced.

Description

technical field [0001] The invention relates to the field of load capacitance driving, in particular to a load capacitance driver and a driving method thereof. Background technique [0002] In some applications, such as plasma display drivers and data transmission drivers. Usually it is necessary to drive the load capacitor from low level to high level, and then maintain the low resistance of the load capacitor at high level; in addition, it is also necessary to release the charge on the load capacitor, and then maintain the load capacitor at a low level. block low level. However, this process consumes a lot of power. [0003] The conventional method of driving the load capacitor is to directly use the power supply to drive the load capacitor high and maintain it at a high level. When the level is low, the load capacitor needs to be short-circuited and discharged to the ground before maintaining it. Using the above-mentioned load capacitance driving method, when the power...

AI Technical Summary

Problems solved by technology

Therefore, the above-mentioned method of using the power supply to directly drive the load capacitance is very wasteful of electric energy.

[0004] In the prior art, in order to solve the problem of excessive waste of electric energy, the load capacitance is usually driven to a high level by one oscillation of LC (inductance-load capacitance) and maintained at a low-impedance high-level state, and then the load capacitance is driven to a high level by one LC oscillation. All the energy on the circuit is recovered and maintained in a low-impedance and low-level state

Although this approach solves the problem of inefficiency in conventional methods, there are still problems such as slow drive speed, low efficiency and large inductance.

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