Bosch Active Line 3 printed circuit board expained

Bosch Active Line 3 printed circuit board taken apart

Note that the SMD components are soldered with a very high quality, comparable to that of smartphones.
Instead of varnishing the whole PCB, this has only been done locally.

See also part 1 Bosch Active Line 3 mid-drive motor tear down

PCB top side

Bosch active line 3 PCB TS dismantled

Serial numbers: 37170191 / 1270014076

U1

SPC56EL60L3
32-bit MCU for automotive and safety applications (SIL3/ASILD)

U2

DRV8301
Three phase gate driver with dual current shunt amplifiers and buck regulator

DRV8301 3 phase gate driver
U3

UJA1076A
High-speed CAN core system basis chip

U4

HC74 flipflop

U5

TPS54360
Step-Down converter
60V input, 3.5A output

Q1 … Q6

BUK7Y4R8-60E
Power Mosfet
Marking code: 74E860
60V / 100A
4.8mOhm

D1

SM8S43A
43V Transient Voltage Suppressor
Peak forward surge current 700A
AEC-Q101 qualified

D2

SS5P6
Schottky diode
60V 5A

R1 R2

Current sense resistor 
2mOhm

PCB bottom side

Bosch active line 3 PCB BS taken apart

U1

VNQ7050AJ
Quad channel high-side driver with current sense analog feedback
Marking code VQ7050A

U2 U4

Unknow code 81KG4

U3 U5

TS922AIYPT
Rail-to-rail, high output current, dual operational amplifier
Marking code 922AY

U6 U7

Unreadable code

U8

The chip has no code

U9

LMV324

Quad low-voltage rail-to-rail output operational amplifiers

U10

Unknown code G2K

U11 U12

8-pin
Unknow code TDK01 / 432A080 / 7G5C1
Very likely a TDK angle sensor

Part 1

Bosch Active Line 3 mid-drive motor tear down

Bosch active line 3 opened