Correction method and circuit for current rudder DAC buck-boost

Abstract

The invention discloses a current rudder DAC buck-boost correction method and circuit, wherein the method includes: image value acquisition: taking the code value N to be converted as the central value to obtain n pairs of code values, and the n pair of code values ​​are A1 to An and B1 to Bn, wherein, the code value A1 to An is greater than the code value N, the code value B1 to Bn is less than the code value N, n is a positive integer, and the mean value of every pair of code values ​​is N; within a certain time T, from the code value B1 To Bn, N, and A1 to An, take out any code value without repetition and output it to the digital-to-analog conversion unit until all 2n+1 code values ​​are taken, and each code value maintains the same time; output adjustment: the adjustment unit adjusts all The output of the digital-to-analog conversion unit is adjusted to stabilize the output voltage of the buck-boost circuit. According to the current rudder DAC buck-boost correction method of the above-mentioned technical solution, the influence caused by the mismatch of a single code value is reduced through the round-robin of the mirror code value, the differential nonlinearity of the digital-to-analog conversion is reduced, and the monotonicity of the buck-boost voltage regulation output is improved. sex.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a current steering DAC buck-boost correction method and a current steering DAC buck-boost circuit capable of implementing the method. Background technique [0002] With the development of consumer electronic products, the requirements for charging technology are becoming more and more stringent, and buck-boost circuits are becoming more and more popular. In recent years, mobile phones, tablets, smart watches and TWS have entered the homes of ordinary people. Today, when there is no breakthrough in battery technology, battery life has become a parameter that must be mentioned in all consumer electronics products. Charging is an indispensable part of it. An indispensable link has been paid more and more attention by power supply manufacturers. High-voltage fast charging and low-voltage direct charging technologies have also emerged, USB Type_C ports have become popular, and the a...

AI Technical Summary

Problems solved by technology

Due to changes in environmental factors such as temperature and heat, as well as some factors of the current source array itself, large jumps often occur when individual code values ​​are converted into corresponding voltage values ​​or current values, which is difficult to meet the monotonic requirements of the buck-boost circuit

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