Design of a Switching Power Supply with Digital Control and Thick-Film Hybrid Integration

doi:10.16628/j.cnki.2095-8188.2025.08.005

LOW VOLTAGE APPARATUS ›› 2025, Vol. 0 ›› Issue (8): 34-38.doi: 10.16628/j.cnki.2095-8188.2025.08.005

• Electrical Design & Discussion • Previous Articles Next Articles

Design of a Switching Power Supply with Digital Control and Thick-Film Hybrid Integration

ZOU Yang¹^,², SONG Qin¹, WU Chenglong¹

1. The 43rd Research Institute of China Electronics Technology Group Corporation, Hefei 230088, China
2. Anhui Province Key Laboratory of Microsystem, Hefei 230088, China

Received:2025-05-30 Online:2025-08-30 Published:2025-09-26

Abstract

Abstract:

Based on the principle of the digital power controller and the thick-film hybrid integration process,a prototype of a digitally controlled and thick-film hybrid integrated switching power supply with 28 V input and 5 V/40 A output was designed. Principle analysis and parameter design were carried out focusing on the main circuit and the digital control circuit,and simulation was conducted on the digital control loop with input voltage feedforward and output voltage feedback. Subsequent experimental results show that the prototype has excellent steady-state and dynamic characteristics,which can verifie the correctness and feasibility of the design scheme.

Key words: thick film hybrid integration, digital control, voltage feedforward, low voltage high current

CLC Number:

TM46

ZOU Yang, SONG Qin, WU Chenglong. Design of a Switching Power Supply with Digital Control and Thick-Film Hybrid Integration[J]. LOW VOLTAGE APPARATUS, 2025, 0(8): 34-38.

Figures/Tables 10

References 11

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参数	数值	参数	数值
输入电压U_in/V	28	变压器匝数N/匝	3∶1∶1
输出电压U_out/V	5	输出电感L/μH	0.5
输出电流I_o/A	40	输出电容C/μF	394
单管开关频率 f_s/kHz	200	输出电阻 R_esr/mΩ	90//90// 135

参数	测试条件	测试结果
输出纹波/mV	U_in=28 V,满载	200
电压调整度/mV	U_in=20~50 V,满载	28
电流调整度/mV	U_in=28 V,空载-满载	26
效率/%	U_in=28 V,满载	90.8
短路功耗/W	短路	28
容性负载/μF	对稳态参数不影响	10 000
启动过冲/V	U_in=0→28 V,满载	0
输出跃变幅值/mV	U_in=28 V,半载-满载	900
输出跃变恢复时间/μs	U_in=28 V,半载-满载	500

Design of a Switching Power Supply with Digital Control and Thick-Film Hybrid Integration

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