CHARGE AND DISCHARGE SIGNAL CIRCUIT AND DCDC CONVERTER

• Main Author: KONDO MASAFUMI
• Format: Patent
• Language: English; Japanese
• Published: 11.05.2015
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a charge and discharge signal circuit that enables a small-sized and high-efficiency DCDC converter.SOLUTION: The charge and discharge signal circuit includes: a plurality of high-side transistors Mn15 to Mn17 connected in series between a high-potential-side power supply Vdd and an output node LX; a plurality of low-side transistors Mn11 to Mn14 connected in series between a low-potential-side power supply GND and the output node; a plurality of high-side drive circuits; a plurality of low-side drive circuits; and a drive signal generation circuit 31. Each high-side drive circuit has a row of capacitors Chc1 and Chc2 and switch elements Dhc1 and Dhc2, and high-side drive sections Ip1 to Ip4. Each low-side drive circuit has a row of capacitors Clc1 and Clc2 and switch elements Dlc1 and Dlc2, and low-side drive sections In1 to In4. The plurality of high-side drive circuits or the plurality of low-side drive circuits have level shifters 81 to 83, and the adjacent two high-side drive circuits or the adjacent two low-side drive circuits receive the same output from the common level shifter. 【課題】小型で高効率のＤＣＤＣコンバータを実現する充放電信号回路の提供。【解決手段】高電位側電源Vddと出力ノードLX間に直列に接続された複数のハイサイド側トランジスタMn15-17と、低電位側電源GNDと出力ノード間に直列に接続された複数のローサイド側トランジスタMn11-Mn14と、複数のハイサイド側駆動回路と、複数のローサイド側駆動回路と、駆動信号生成回路31と、を有し、各ハイサイド側駆動回路は、容量Chc1-Chc2とスイッチ素子Dhc1-Dhc2の列と、ハイサイド駆動部Ip1-Ip4と、を有し、各ローサイド側駆動回路は、容量Clc1-Clc2とスイッチ素子Dlc1-Dlc2の列と、ローサイド駆動部In1-In4と、を有し、複数のハイサイドまたはローサイドローサイド駆動回路は、レベルシフタ81-83を有し、隣接する２個のハイサイドまたはローサイド駆動部は、共通のレベルシフタからの同じ出力を受ける充放電信号回路。【選択図】図１９