基于开关电容DC-DC转换器的两路主从输出策略

doi:10.16180/j.cnki.issn1007-7820.2020.06.007

Abstract

Abstract:

The linear regulation and load regulation of traditional DC-DC converter is not ideal. Aiming at this problem, this paper adopted a output method of dual output time division multiplexing. In the case of control switch phase interleaving, the master-slave output were transmitted respectively, and the specific modulation strategy was proposed. PFM was adopted for the master output and PSM was utilized for the slave output. Meanwhile, the concept of average frequency was introduced to realize the quantitative characterization of driving capability. Circuit design and simulation were carried out under Cadence software. The simulation results showed that the linear regulation of master output was 3.01% and the load regulation was 3.54%; the linear regulation of slave output was 3.75% and the load regulation was 4.28%.

Key words: DC-DC converter, dual output, time division multiplexing, pulse frequency modulation, pulse skipping modulation, linear regulation, load regulation

CLC Number:

TN432

WU Hanhan,BU Gang. Dual Master-Slave Output Strategy Based on Switching Capacitor DC-DC Converter[J].Electronic Science and Technology, 2020, 33(6): 35-39.

Figures/Tables 10

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References 16

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设计指标	大小及范围
输入电压	2.64.2 V
输出电压(主/从)	1.8 V/1.2 V
负载电流	≤60 mA
负载电容	20 μF
时钟频率	50850 kHz
飞跨电容大小	300 pF
线性调整率	≤5%
负载调整率	≤5%
上电速度	≤1 ms

Dual Master-Slave Output Strategy Based on Switching Capacitor DC-DC Converter

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