Tesla Model 3 Rear Drive Unit

External Documentation

Tesla Model 3 Rear Drive Unit Hacking (forum thread)

https://github.com/damienmaguire/Tesla-Model-3-Drive-Unit (Hardware and reverse engineering details)

https://github.com/jsphuebner/stm32-sine/tree/tesla-m3-gate-driver (STM32 "modboard" firmware dev. branch)

Part Numbers

Part Number	Description	Max Current	Cars
1120970-00-F	(ASY,M3,3DU,REAR,IGBT) - original RWD and/or "binned" Perf	800A	Model 3
1120980-00-G	(ASY,M3,REAR 3DU,MOSFET,GLOBAL) - early AWD motor	800A	Model 3 / Model Y
1120990-00-G	(ASY,M3,REAR,MOSFET-LC,GLOBAL) - newer AWD motor	600A	Model 3 / Model Y
1120990-00-H	(ASY,M3,REAR,MOSFET-LC,GLOBAL) - newer AWD motor 2021 with few hints on it's actual existence ([2])	???A	Model 3 / Model Y
1120990-00-J	(ASY,M3,REAR,MOSFET-LC,GLOBAL) - current (Jan 2022) AWD (EPC [3])	???A	Model 3 / Model Y
1521365-00-B	(ASY, REMAN, 3DU-Rear 800 MOSFET) - Remanufactured 1120980-00-G	800A	Model 3 / Model Y
1521487-00-A	(ASY, REMAN, 3DU-REAR 630 MOSFET) - Remanufactured 1120990-00-G	600A	Model 3 / Model Y

[1] Details from https://www.reddit.com/r/teslamotors/comments/ioat3d/rear_motor_efficiency_improvements_980_vs_990/.
[2] https://www.ebay.de/itm/185026392386
[3] https://epc.tesla.com/en/catalogs/138/categories/10030/subcategories/42427

Connectors and Pinouts

Label	Description	Pins	Compatible Plugs
X090	Inverter connector	30	Toyota 90980-12712 (Sumitomo 6189-6987)
?	Rotor Shaft Resolver	10 (8 connected)	TE Connectivity 1-2282337-1
?	Oil Pump	3	TE Connectivity 1-1718644-1

Mechanical Specification

Max rotor speed: 18,447 rpm

Input shaft gear: 31 teeth

Counter shaft input: 81 teeth

Counter shaft output: 24 teeth

Ring gear: 83 teeth

Gearbox Ratio: (81/31) * (83/24) = 9.036

Details from https://www.youtube.com/watch?v=SRUrB7ruh-8.

Inverter Components

Manufacturer	Part No	Description	Quantity	Datasheet
ST	ST GK026	SiC FET drive transistors	24	https://www.st.com/en/power-transistors/sctw100n65g2ag.html (?)
ST	STGAP1AS	Gate Drivers	6	https://www.st.com/en/power-management/stgap1as.html
ST	STD46P4LLF6	P-channel Power MOSFET 40V	6	https://www.st.com/en/power-transistors/std46p4llf6.html
Infineon	3N0408	N-channel Power Transistor	6
TI	TMS320F28377DPTPQ	C2000 Delfino MCU	1	TMS320F2837xD Dual-Core Microcontrollers Datasheet TMS320F2837xD Dual-Core Microcontrollers Technical Reference Manual
On Semi	TCA0372BDW	Resolver amplifier	1	https://www.onsemi.com/pdf/datasheet/tca0372-d.pdf
TI	LMV844	Temperature sensor amplifier	1	https://www.ti.com/lit/gpn/lmv844
Microchip	25LC256E	EEPROM	1	http://ww1.microchip.com/downloads/en/DeviceDoc/20005715A.pdf
TI	SN65HVD1040A	CAN Transceiver	2	https://www.ti.com/lit/ds/symlink/sn65hvd1040a-q1.pdf
NXP	TJA1021	LIN Transceiver	1	https://www.nxp.com/docs/en/data-sheet/TJA1021.pdf
Broadcom	ACPL-C87BT-000E	DC HV sense	1	https://docs.broadcom.com/docs/AV02-3564EN
Infineon	TLF35584QVVS2	DC-DC Power and system watchdog	1	https://uk.farnell.com/infineon/tlf35584qvvs1xuma2/multi-volt-pwr-supply-ic-40-to/dp/3155085
TDK	VGT22EPC-222S6A12	DC-DC Transformer (gate drive?)	1	https://product.tdk.com/en/search/transformer/transformer/gate-drive/info?part_no=VGT22EPC-200S6A12

Details from https://www.youtube.com/watch?v=l6dV2re3rtM. [Category:Gearbox]]