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ST L9678-S-EVB User Manual
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ST L9678-S-EVB User Manual

Evaluation board for l9678 airbag and battery cut-off ic
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UM3144
User manual
Evaluation board for L9678 airbag and battery cut-off IC
Introduction
The L9678-S-EVB evaluation board is an evaluation board designed to provide to the user a platform for the evaluation of the
L9678P or L9678P-S devices. The board provides all the main input/output capabilities needed to properly drive all IC inputs
and outputs and to provide diagnostic functionalities.
UM3144 - Rev 1 - March 2023
www.st.com
For further information contact your local STMicroelectronics sales office.

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Summary of Contents for ST L9678-S-EVB

  • Page 1 Introduction The L9678-S-EVB evaluation board is an evaluation board designed to provide to the user a platform for the evaluation of the L9678P or L9678P-S devices. The board provides all the main input/output capabilities needed to properly drive all IC inputs and outputs and to provide diagnostic functionalities.

  • Page 2: Hardware Description

    UM3144 Hardware description Hardware description The L9678-S-EVB evaluation board has been developed to evaluate the L9678P or L9678P-S devices and test all their functionalities. Its main features are: • L9678P/L9678P-S placed into a socket allowing an easy change of the samples •...

  • Page 3: Board Layout

    UM3144 Board layout Board layout Figure 2. Assembly Top Figure 3. Assembly Bottom UM3144 - Rev 1 page 3/12...

  • Page 4: Jumpers And Connectors Description

    UM3144 Jumpers and connectors description Jumpers and connectors description Table 1 the name of each jumper on the board is listed while their default setting (closed or open) is reported in green; the name of the connectors and test points present on the board is also remarked. Table 1.
  • Page 5 UM3144 Jumpers and connectors description J = Jumper Name Function Closed Open C = Connector To connect the ER cap Cap positive connected to Cap positive not positive to VER connected to VER Airbag standard connector 1. Default condition. UM3144 - Rev 1 page 5/12...

  • Page 6: Test Point List

    UM3144 Test point list Test point list Designator Name Function FENH FENH monitoring FENL FENL monitoring COVRACT COVRACT monitoring ACL monitoring ARM1 ARM/ARM1 monitoring WDT monitoring ERBOOST ERBOOST monitoring uc_SAFING Monitoring of μC safing FET enable VIN monitoring TP10 VDD3P3 VDD3P3 monitoring TP11 BVSUP...
  • Page 7 UM3144 Test point list Designator Name Function TP39 GND monitoring UM3144 - Rev 1 page 7/12...

  • Page 8: Revision History

    UM3144 Revision history Table 2. Document revision history Date Version Changes 02-Mar-2023 Initial release. UM3144 - Rev 1 page 8/12...

  • Page 9: Table Of Contents

    UM3144 Contents Contents Hardware description ............. . 2 Board layout.
  • Page 10 UM3144 List of tables List of tables Table 1. Jumpers and connectors description ............4 Table 2.
  • Page 11 L9678-S-EVB evaluation board........
  • Page 12 ST’s terms and conditions of sale in place at the time of order acknowledgment. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of purchasers’...