Control circuit and method for ultralow static power consumption and switching type regulator
A control circuit and static power consumption technology, applied in the direction of control/regulation system, adjustment of electric variables, output power conversion device, etc., can solve the problems of unfavorable low power consumption and low cost, increased power loss, and many working modules. Achieve ultra-low static power consumption, reduce ripple, and solve the effect of transmission delay
Active Publication Date: 2014-07-23
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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Problems solved by technology
[0004] It can be seen that there are many and complex working modules in the control chip of the prior art, which is not conducive to the design of low power consumption and low cost
And when the control chip is in standby, in order for the chip to work normally in the sleep mode, at least the standby judgment module 1, the reference circuit module 2, and the output voltage error operational amplifier module 3 need to be in the enabled state all the time, which will inevitably increase the control chip. Power loss in standby
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[0040] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.
[0041] refer to Figure 2B Shown is a schematic diagram of an ultra-low static power consumption control circuit according to the present invention. In this embodiment, the power stage circuit takes a synchronous boost topology as an example, as Figure 2A In the synchronous boost power stage circuit shown, BG is a power switch tube (tha...
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The invention discloses a control circuit and method for ultralow static power consumption and a switching type regulator. Control over switch-on and switch-off of a switching tube is achieved through a voltage comparison circuit, a zero-cross detection circuit and a current comparison circuit, a control scheme is simple, and the number of modules is small; the effect of the ultralow static power consumption is achieved through a comparator with low power consumption, the influence of transmission delay caused by the low-power-consumption comparison circuits on the control circuit is eliminated through a blanking circuit, and therefore ripple waves of output voltage are reduced.
Description
technical field [0001] The invention relates to the field of power electronics, more specifically, to an ultra-low static power consumption control circuit and a switching regulator using the same. Background technique [0002] In consumer electronics applications, such as smart watches and other portable wearable products, medical and health equipment, etc., there are very strict requirements on the power consumption of the entire system in power-saving mode, also known as static power consumption. [0003] Switching regulators in the prior art such as boost regulators, taking the synchronous boost regulator as an example, its control circuit is as follows figure 1 As shown, it includes a power switch (BG) and a synchronous switch (TG). The general control scheme often adopts the peak current control mode. The control chip includes the following working modules, which are standby judgment module 1 and reference voltage circuit module 2. The error operational amplifier modu...
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Inventor 孙良伟
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD