M365 Classic/Pro ECU [ESC1]

ECU used in Xiaomi m365 and m365 pro

1.3 and lower – ST14xxx or mixed, U4 TPS54160
1.4 – ST15810
1.5 – some boards now feature NCEP85T14, tinned B+
2.1 – major overhaul, NCEP85T14, tinned traces, U4 SY8502 (up to 85V), PRO only
3.0 – same as 2.1 with reinforced traces from factory, and no PCB markings, PRO only

FETs used: ST14810, ST15810, NCEP85T14, NCE8596A (clone only)
Driver: MT8006A
Input capacitance: 63V 1000uF, 63V 33uF, 100V 100nF

• Interface
  • PAP03-V [B038-PASK] – BMS, rear light
  • PAP05-V [B058-PASK] – Motor halls
  • PAP04-V [B048-PASK] – BLE
• Power
  • Amass XT-30 PCB Female – Battery input
• Motor
  • 4.8/6.3 L-Shaped spring terminal - C/B/A phase connector

Circuit diagram for 1.4
Circuit diagram for 2.1
Connector pin-out

SY8502 datasheet
MT8006 datasheet
TPS54160 datasheet
ST 15810 datasheet
NCEP85T14 datasheet

PAP connectors and SPHD pins on TME

• TPS54160 [1.5 and below] only accepts 56V safely, for more input voltage, trace cut method must be implemented, see here
• SY8502 [2.1 and above] accepts up to 85V input, 65V safely
• TO220 MOSFET packages are poorly thermally connected to the case, see here for possible improvements
• B+ rail has poor electrical conductivity, see here for a fix
• Phase connectors are known to be improperly crimped, it’s advisable to solder wires directly and attach MT30 or MT60 for better contact
• Excessive braking current can burn MOSFET packages, due to active brake implementation

1.4/1.5

2.1/3.0

Thanks goes to Topol for providing the above pictures.