# 400V Switched-Capacitor Energy Transfer ## Description 400V 8kW high-speed switched-capacitor energy transfer system with STM32 control, isolated gate drivers, SiC MOSFET matrix, current sensing, 4-layer PCB constraints, and transient simulation intent. ## Project Details - **Owner:** hydra00 - **Created:** 5/10/2026 - **Last Updated:** 5/10/2026 - **Visibility:** Public - **Implementation Details:** Simulation intent: .tran 0 10m 0 10n. High-voltage rule intent: maintain at least 4.0 mm physical separation between GND_LOGIC copper and VBUS_400V, GND_PWR, CAP_A_POS, CAP_A_NEG, CAP_B_POS, CAP_B_NEG, LOAD_POS, LOAD_NEG. ## Key Components ### D_TVS_HV — [SMAJ440A-TP](https://www.flux.ai/lcsc/smaj440a-tp~53qa.md) - Voltage Rating: 440V - Manufacturer Part Number: SMAJ440A-TP - Part Type: TVS - Product Info Url: https://lcsc.com/product-detail/TVS_MCC-Micro-Commercial-Components-MCC-SMAJ440A-TP_C779049.html - Role Details: Placed at HV input; clamps high-voltage bus transients; verify surge energy/thermal rating before hardware - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_MCC-Micro-Commercial-Components-SMAJ440A-TP_C779049.pdf - Manufacturer Name: MCC(美微科) - Package or Case Code: SMA_L4.4-W2.8-LS5.4-RD - JLCPCB Part Class: Extended Part - Role: HV TVS clamp - LCSC Part Number: C779049 **Pins:** - A [pin 2] - C [pin 1] ### D1 — [ES1J](https://www.flux.ai/lcsc/es1j~fqqm.md) - JLCPCB Part Class: Extended Part - LCSC Part Number: C412438 - Forward Voltage: 0.45V-0.50V - Manufacturer Part Number: ES1J - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MDD-Microdiode-Electronics-ES1JG_C412438.html - Manufacturer Name: MDD(辰达半导体) - Max Reverse Voltage: 600V - Part Type: Diodes - Fast Recovery Rectifiers - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2410010403_MDD-Microdiode-Semiconductor-ES1J_C412438.pdf - Role Details: Bootstrap diode; verify actual ES1J library property mismatch before production - Diode Type: Fast recovery rectifier - Package or Case Code: SMA_L4.4-W2.8-LS5.4-RD **Pins:** - A [pin 2] - C [pin 1] ### D2 — [ES1J](https://www.flux.ai/lcsc/es1j~fqqm.md) - Part Type: Diodes - Fast Recovery Rectifiers - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2410010403_MDD-Microdiode-Semiconductor-ES1J_C412438.pdf - Diode Type: Fast recovery rectifier - Package or Case Code: SMA_L4.4-W2.8-LS5.4-RD - JLCPCB Part Class: Extended Part - LCSC Part Number: C412438 - Manufacturer Part Number: ES1J - Role Details: Bootstrap diode; verify actual ES1J library property mismatch before production - Forward Voltage: 0.45V-0.50V - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MDD-Microdiode-Electronics-ES1JG_C412438.html - Max Reverse Voltage: 600V - Manufacturer Name: MDD(辰达半导体) **Pins:** - A [pin 2] - C [pin 1] ### D3 — [ES1J](https://www.flux.ai/lcsc/es1j~fqqm.md) - Manufacturer Part Number: ES1J - Forward Voltage: 0.45V-0.50V - LCSC Part Number: C412438 - JLCPCB Part Class: Extended Part - Manufacturer Name: MDD(辰达半导体) - Max Reverse Voltage: 600V - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MDD-Microdiode-Electronics-ES1JG_C412438.html - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2410010403_MDD-Microdiode-Semiconductor-ES1J_C412438.pdf - Part Type: Diodes - Fast Recovery Rectifiers - Package or Case Code: SMA_L4.4-W2.8-LS5.4-RD - Diode Type: Fast recovery rectifier - Role Details: Bootstrap diode; verify actual ES1J library property mismatch before production **Pins:** - A [pin 2] - C [pin 1] ### D4 — [ES1J](https://www.flux.ai/lcsc/es1j~fqqm.md) - Package or Case Code: SMA_L4.4-W2.8-LS5.4-RD - Diode Type: Fast recovery rectifier - Role Details: Bootstrap diode; verify actual ES1J library property mismatch before production - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2410010403_MDD-Microdiode-Semiconductor-ES1J_C412438.pdf - Part Type: Diodes - Fast Recovery Rectifiers - Max Reverse Voltage: 600V - Manufacturer Name: MDD(辰达半导体) - Product Info Url: https://lcsc.com/product-detail/Diodes-Rectifiers-Fast-Recovery_MDD-Microdiode-Electronics-ES1JG_C412438.html - Forward Voltage: 0.45V-0.50V - Manufacturer Part Number: ES1J - JLCPCB Part Class: Extended Part - LCSC Part Number: C412438 **Pins:** - A [pin 2] - C [pin 1] ### DZ_G1 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - Part Type: Diode - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: BZT52C18-7-F - Voltage Rating: 18V - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Role: MOSFET VGS clamp - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### DZ_G2 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Voltage Rating: 18V - Manufacturer Part Number: BZT52C18-7-F - Manufacturer Name: Diodes Incorporated - Role: MOSFET VGS clamp - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent **Pins:** - A [pin 2] - K [pin 1] ### DZ_G3 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - Voltage Rating: 18V - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Manufacturer Part Number: BZT52C18-7-F - Manufacturer Name: Diodes Incorporated - Part Type: Diode - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - License: https://creativecommons.org/licenses/by/4.0/ - Role: MOSFET VGS clamp **Pins:** - A [pin 2] - K [pin 1] ### DZ_G4 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role: MOSFET VGS clamp - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - Manufacturer Name: Diodes Incorporated - Voltage Rating: 18V - Part Type: Diode - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Manufacturer Part Number: BZT52C18-7-F **Pins:** - A [pin 2] - K [pin 1] ### DZ_G5 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - Manufacturer Name: Diodes Incorporated - Role: MOSFET VGS clamp - Part Type: Diode - Voltage Rating: 18V - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Manufacturer Part Number: BZT52C18-7-F - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - A [pin 2] - K [pin 1] ### DZ_G6 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - Role: MOSFET VGS clamp - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - Voltage Rating: 18V - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BZT52C18-7-F - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Part Type: Diode - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### DZ_G7 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - License: https://creativecommons.org/licenses/by/4.0/ - Voltage Rating: 18V - Part Type: Diode - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: BZT52C18-7-F - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Role: MOSFET VGS clamp **Pins:** - A [pin 2] - K [pin 1] ### DZ_G8 — [BZT52C18-7-F](https://www.flux.ai/adrian95/bzt52c18-7-f~1ig.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: BZT52C18-7-F - Voltage Rating: 18V - Role: MOSFET VGS clamp - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds18004.pdf - Role Details: Bidirectional/anti-series behavior may require paired zeners in final hardware; schematic marks gate protection intent - Part Type: Diode - Manufacturer Name: Diodes Incorporated **Pins:** - A [pin 2] - K [pin 1] ### J1 — [WJ500V-5.08-2P](https://www.flux.ai/adrian95/wj500v-5p08-2p~xy7.md) - Part Type: Connector - Manufacturer Name: Ningbo Kangnex - Connector Type: Terminal Blocks - Manufacturer Part Number: WJ500V-5.08-2P - Datasheet URL: https://datasheet.lcsc.com/szlcsc/1912251636_Ningbo-Kangnex-Elec-WJ500V-5-08-2P_C8465.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [WJ500V-5.08-2P](https://www.flux.ai/adrian95/wj500v-5p08-2p~xy7.md) - Part Type: Connector - Connector Type: Terminal Blocks - Manufacturer Name: Ningbo Kangnex - Manufacturer Part Number: WJ500V-5.08-2P - Datasheet URL: https://datasheet.lcsc.com/szlcsc/1912251636_Ningbo-Kangnex-Elec-WJ500V-5-08-2P_C8465.pdf **Pins:** - 1 [pin 1] - 2 [pin 2] ### Q1 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: C3M0065090D - Manufacturer Name: Wolfspeed, Inc. - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Part Type: Transistor **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q2 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - Manufacturer Part Number: C3M0065090D - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Wolfspeed, Inc. - Part Type: Transistor - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q3 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Part Type: Transistor - Manufacturer Name: Wolfspeed, Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: C3M0065090D **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q4 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: C3M0065090D - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Part Type: Transistor - Manufacturer Name: Wolfspeed, Inc. **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q5 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - Part Type: Transistor - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Manufacturer Name: Wolfspeed, Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: C3M0065090D **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q6 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Part Type: Transistor - Manufacturer Name: Wolfspeed, Inc. - Manufacturer Part Number: C3M0065090D - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q7 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Part Type: Transistor - Manufacturer Name: Wolfspeed, Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: C3M0065090D **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### Q8 — [C3M0065090D](https://www.flux.ai/adrian95/c3m0065090d~okb.md) - Manufacturer Name: Wolfspeed, Inc. - Part Type: Transistor - Datasheet URL: https://assets.wolfspeed.com/uploads/2020/12/C3M0065090D.pdf - Manufacturer Part Number: C3M0065090D - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - D [pin 3] - G [pin 1] - S [pin 2] ### U1 — [STM32G474RET6](https://www.flux.ai/lcsc/stm32g474ret6~yzz.md) - Manufacturer Name: ST(意法半导体) - Package or Case Code: LQFP-64_L10.0-W10.0-P0.50-LS12.0-BL - LCSC Part Number: C521608 - Product Info Url: https://lcsc.com/product-detail/No-specification-for-star-making-plan_STMicroelectronics-STM32G474RET6_C521608.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-STM32G474RET6_C521608.pdf - Part Type: ST Microelectronics - JLCPCB Part Class: Extended Part - Manufacturer Part Number: STM32G474RET6 **Pins:** - PA0 [pin 12] - PA1 [pin 13] - PA10 [pin 44] - PA11 [pin 45] - PA12 [pin 46] - PA13 [pin 49] - PA14 [pin 50] - PA15 [pin 51] - PA2 [pin 14] - PA3 [pin 17] - PA4 [pin 18] - PA5 [pin 19] - PA6 [pin 20] - PA7 [pin 21] - PA8 [pin 42] - PA9 [pin 43] - PB0 [pin 24] - PB1 [pin 25] - PB10 [pin 30] - PB11 [pin 33] - PB12 [pin 34] - PB13 [pin 35] - PB14 [pin 36] - PB15 [pin 37] - PB2 [pin 26] - PB3 [pin 56] - PB4 [pin 57] - PB5 [pin 58] - PB6 [pin 59] - PB7 [pin 60] - PB8-BOOT0 [pin 61] - PB9 [pin 62] - PC0 [pin 8] - PC1 [pin 9] - PC10 [pin 52] - PC11 [pin 53] - PC12 [pin 54] - PC13 [pin 2] - PC14-OSC32_IN [pin 3] - PC15-OSC32_OUT [pin 4] - PC2 [pin 10] - PC3 [pin 11] - PC4 [pin 22] - PC5 [pin 23] - PC6 [pin 38] - PC7 [pin 39] - PC8 [pin 40] - PC9 [pin 41] - PD2 [pin 55] - PF0-OSC_IN [pin 5] - PF1-OSC_OUT [pin 6] - PG10-NRST [pin 7] - VBAT [pin 1] - VDD [pin 16] - VDD [pin 32] - VDD [pin 48] - VDD [pin 64] - VDDA [pin 29] - VREF+ [pin 28] - VSS [pin 47] - VSS [pin 31] - VSS [pin 15] - VSS [pin 63] - VSSA [pin 27] ### U2 — [MEJ2S1215SC](https://www.flux.ai/lcsc/mej2s1215sc~qipv.md) - Part Type: Power Modules - Manufacturer Part Number: MEJ2S1215SC - Package or Case Code: PWRM-TH_MEJ2SXXXXSC - JLCPCB Part Class: Extended Part - Target Manufacturer Part Number: MEJ2D1215SC - LCSC Part Number: C184952 - Manufacturer Name: muRata(村田) - Implementation Details: Exact MEJ2D1215SC was not available in the library; verify/replace with exact dual-output Murata MEJ2D1215SC before fabrication. - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_Murata-Electronics-MEJ2S1215SC_C184952.pdf - Product Info Url: https://lcsc.com/product-detail/Others_Murata-Electronics_MEJ2S1215SC_Murata-Electronics-MEJ2S1215SC_C184952.html **Pins:** - -VIN [pin 2] - -VOUT [pin 5] - +VIN [pin 1] - +VOUT [pin 7] ### U3 — [UCC21520DW](https://www.flux.ai/kicad-part-library/ucc21520dw~ob.md) - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: SOIC-16W_7.5x10.3mm_P1.27mm - Manufacturer Part Number: UCC21520DW - Datasheet URL: http://www.ti.com/lit/ds/symlink/ucc21520.pdf **Pins:** - DIS [pin 5] - DT [pin 6] - GND [pin 4] - INA [pin 1] - INB [pin 2] - NC [pin 12] - NC [pin 13] - NC [pin 7] - OUTA [pin 15] - OUTB [pin 10] - VCCI [pin 3] - VCCI [pin 8] - VDDA [pin 16] - VDDB [pin 11] - VSSA [pin 14] - VSSB [pin 9] ### U4 — [UCC21520DW](https://www.flux.ai/kicad-part-library/ucc21520dw~ob.md) - Datasheet URL: http://www.ti.com/lit/ds/symlink/ucc21520.pdf - Package or Case Code: SOIC-16W_7.5x10.3mm_P1.27mm - Manufacturer Part Number: UCC21520DW - Manufacturer Name: Texas Instruments Inc. **Pins:** - DIS [pin 5] - DT [pin 6] - GND [pin 4] - INA [pin 1] - INB [pin 2] - NC [pin 12] - NC [pin 13] - NC [pin 7] - OUTA [pin 15] - OUTB [pin 10] - VCCI [pin 3] - VCCI [pin 8] - VDDA [pin 16] - VDDB [pin 11] - VSSA [pin 14] - VSSB [pin 9] ### U5 — [UCC21520DW](https://www.flux.ai/kicad-part-library/ucc21520dw~ob.md) - Datasheet URL: http://www.ti.com/lit/ds/symlink/ucc21520.pdf - Package or Case Code: SOIC-16W_7.5x10.3mm_P1.27mm - Manufacturer Part Number: UCC21520DW - Manufacturer Name: Texas Instruments Inc. **Pins:** - DIS [pin 5] - DT [pin 6] - GND [pin 4] - INA [pin 1] - INB [pin 2] - NC [pin 12] - NC [pin 13] - NC [pin 7] - OUTA [pin 15] - OUTB [pin 10] - VCCI [pin 3] - VCCI [pin 8] - VDDA [pin 16] - VDDB [pin 11] - VSSA [pin 14] - VSSB [pin 9] ### U6 — [UCC21520DW](https://www.flux.ai/kicad-part-library/ucc21520dw~ob.md) - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: UCC21520DW - Package or Case Code: SOIC-16W_7.5x10.3mm_P1.27mm - Datasheet URL: http://www.ti.com/lit/ds/symlink/ucc21520.pdf **Pins:** - DIS [pin 5] - DT [pin 6] - GND [pin 4] - INA [pin 1] - INB [pin 2] - NC [pin 12] - NC [pin 13] - NC [pin 7] - OUTA [pin 15] - OUTB [pin 10] - VCCI [pin 3] - VCCI [pin 8] - VDDA [pin 16] - VDDB [pin 11] - VSSA [pin 14] - VSSB [pin 9] ### U7 — [ACS730KLCTR-40AB-T](https://www.flux.ai/lcsc/acs730klctr-40ab-t~8zii.md) - Manufacturer Name: ALLEGRO(美国埃戈罗) - JLCPCB Part Class: Extended Part - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Manufacturer Part Number: ACS730KLCTR-40AB-T - LCSC Part Number: C459337 - Part Type: Current Sensors **Pins:** - GND [pin 5] - IP- [pin 4] - IP- [pin 3] - IP+ [pin 1] - IP+ [pin 2] - VCC [pin 8] - VIOUT [pin 7] - VZCR [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/hydra00/400v-switched-capacitor-energy-transfer~wq](https://www.flux.ai/hydra00/400v-switched-capacitor-energy-transfer~wq).* --- *Generated from [https://www.flux.ai/hydra00/400v-switched-capacitor-energy-transfer~wq](https://www.flux.ai/hydra00/400v-switched-capacitor-energy-transfer~wq)*