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felinefriendly:bosch:b30237 [2018/11/21 22:05] – created e30tunerfelinefriendly:bosch:b30237 [2025/08/04 21:23] (current) – external edit 127.0.0.1
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 This part was taken from a Motronic M1.7.3 engine control unit (ECU), which was commonly used on 1.6L & 1.8L 4-cylinder BMWs of the mid-E36 generation. While this chip was likely used on a number of ECUs, the specific one in this case had Bosch PN 0 261 203 661. This part was taken from a Motronic M1.7.3 engine control unit (ECU), which was commonly used on 1.6L & 1.8L 4-cylinder BMWs of the mid-E36 generation. While this chip was likely used on a number of ECUs, the specific one in this case had Bosch PN 0 261 203 661.
  
-Functionally, this chip serves as a transistor driver. It drives the base directly, acting as a current source. These are no externally-visible passives to indicate that the base current can be adjusted, so it would seem to be fixed internally on the die. Additionally, looks to have the capacity to drive 8 transistors. In the application in which it was taken from, it is driving the bases of high-current transistors which switch the primary sides of ignition coils.+Functionally, this chip serves as a transistor driver. It drives the base directly, acting as a current source. These are no externally-visible passives to indicate that the base current can be adjusted, so drive current would seem to be fixed internally on the die. Additionally, it looks to have the capacity to drive up to 8 transistors. In the application in which it was taken from, it was driving the bases of high-current Darlington-pair transistors which switch the primary sides of ignition coils.
  
 ====== Package ====== ====== Package ======
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 {{:felinefriendly:bosch:b30237:s500_die_normallight_500x_small.jpg?400|}} {{:felinefriendly:bosch:b30237:s500_die_normallight_500x_small.jpg?400|}}
  
-//Note: This is a ~16X downsampled version of the original image. A full resolution version (39MB) can be provided. On the to-do list…//+//Note: This is a ~4X downsampled version of the original image. A full resolution version (11MB) can be provided. On the to-do list…//
  
 Imaged using edge lighting, for enhanced shadow contrast:  Imaged using edge lighting, for enhanced shadow contrast: 
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 {{:felinefriendly:bosch:b30237:s500_die_edgelight_500x_small.jpg?400|}} {{:felinefriendly:bosch:b30237:s500_die_edgelight_500x_small.jpg?400|}}
  
-//Note: This is a ~16X downsampled version of the original image. A full resolution version (58MB) can be provided. On the to-do list…//+//Note: This is a ~4X downsampled version of the original image. A full resolution version (17MB) can be provided. On the to-do list…//
felinefriendly/bosch/b30237.1542837923.txt.gz · Last modified: 2018/11/21 22:05 by e30tuner