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UM3145
User manual
Evaluation board for L9679E airbag and battery cut-off IC
Introduction
The L9679E-EVB evaluation board allows the user to evaluate the L9679E device. The board provides the main input and
output capabilities needed to properly drive the IC.
UM3145 - Rev 1 - March 2023
www.st.com
For further information contact your local STMicroelectronics sales office.
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Table of Contents
Related Manuals for ST L9679E-EVB
Summary of Contents for ST L9679E-EVB
- Page 1 Evaluation board for L9679E airbag and battery cut-off IC Introduction The L9679E-EVB evaluation board allows the user to evaluate the L9679E device. The board provides the main input and output capabilities needed to properly drive the IC. UM3145 - Rev 1 - March 2023 www.st.com...
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Page 2: Hardware Description
UM3145 Hardware description Hardware description The L9679E-EVB evaluation board has been developed to allow to the user total access to the pins to simplify the probing of each signal. Its main features are: • L9679E placed into a socket allowing an easy change of the samples. -
Page 3: Figure 2. L9679E-Evb Evaluation Board With Soldered Sample
UM3145 Hardware description Figure 2. L9679E-EVB evaluation board with soldered sample UM3145 - Rev 1 page 3/23... -
Page 4: Board Schematics
UM3145 Board schematics Board schematics Figure 3. Board schematic - #1 CON12 CVDD 100nF/16V near t o pi n 37 FEN1 J_FEN1 FEN2 J_FEN2 FENL J_FENL SG45 SG67 SG45 SG67 SG45 SG67 SG45 SG67 Place t o t h e 4 cor ners of t h e boar d SS45 SS67 SS45... -
Page 5: Board Layout
UM3145 Board layout Board layout Figure 5. Assembly Top Eventual different C_ER connections C_ER Supply C_ER discharge connections connections connections SQUIB SQUIB SQUIB SQUIB connections configuration configuration connections In the Figure 5 are identified the following connectors: • Terminal connectors for power supplies (J31) •... -
Page 6: Figure 6. Assembly Bottom
UM3145 Board layout Figure 6. Assembly Bottom UM3145 - Rev 1 page 6/23... -
Page 7: Jumpers And Connectors Description
UM3145 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 8 UM3145 Jumpers and connectors description Jumper open/ J = Jumper Jumper closed/signal Name Function signal NOT Test point connection C = Connector connected SF1 and SR1 NOT SF1 and SR1 The same of SF1 Connection of Squib1 connected to squib and SR1 pins connected to squib 1 SF2 and SR2 NOT...
- Page 9 UM3145 Jumpers and connectors description Jumper open/ J = Jumper Jumper closed/signal Name Function signal NOT Test point connection C = Connector connected Each terminal Each terminal J33_1:J33_12 J33_1:J33_12 J33 CON12 corresponds to the corresponds to the device pins from 1 to device pins from 1 to Each terminal Each terminal...
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Page 10: Supply Connections
UM3145 Supply connections Supply connections Power supply connection is reported in Figure VSAT, that is the main power supply, can be connected to SATBUCK of L9779 or L9680 device; VSYNC can be connected to SYNCBOOST of L9779 or L9680 device; VCC can be connected to VCCBUCK of L9779 or L9680 device. -
Page 11: Figure 8. Squib Power Supply Connections
UM3145 Supply connections Figure 8. Squib power supply connections S_ER 330/2W 100/2W 100nF/35V J_C_ER CON2 4700uF/35V SS01 SS23 J_SS01 J_SS23 10nF/35V 10nF/35V near t o pi n 10 near t o pi n 27 near t h e devi ce or s ocket near t h e devi ce or s ocket SS45 SS67... -
Page 12: Squib Connections
UM3145 Squib connections Squib connections Referring to Figure 9, external squibs have to be connected through J12 (squib0) and the other squib connector available on the board; J69 has to be left open (the same for the correspondent jumpers of the others channels). In order to test the deployment having the high side shorted to GND, J6 (squib0) or the correspondent for the others squibs has to be closed. -
Page 13: Rsux Connections
UM3145 RSUx connections RSUx connections Referring to Figure 10, RSUx can be connected through J5 where only RSU1 is shown: Figure 10. RSUx connection RSU1 22nF/35V near t h e devi ce CON5 2.2nF/35V 2.2nF/35V 2.2nF/35V UM3145 - Rev 1 page 13/23... -
Page 14: Signals Exchanged With Microcontroller
UM3145 Signals exchanged with microcontroller Signals exchanged with microcontroller L9679E board is supposed to work with SPC56P-Discovery board shown in Figure 11, available at st website. Figure 11. SPC56-Discovery board Signals exchanged with microcontroller are available on J4 (see Figure 12). - Page 15 UM3145 Signals exchanged with microcontroller SPC56 board pin Signal L9679E J4 pin CS_G MOSI_G Pin #B1 - B36 FENH SCLK_G MISO_G UC_DIAGEN UM3145 - Rev 1 page 15/23...
- Page 16 UM3145 Signals exchanged with microcontroller SPC56 board pin Signal L9679E J4 pin SATSYNC Pin # C1 - C36 UC_DEPEN FEN2 UM3145 - Rev 1 page 16/23...
- Page 17 UM3145 Signals exchanged with microcontroller SPC56 board pin Signal L9679E J4 pin MOSI_RS Pin # D1 - D36 FEN1 CS_RS SCLK_RS MISO_RS UM3145 - Rev 1 page 17/23...
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Page 18: Figure 12. J4 Connector For L9679E Signals
UM3145 Signals exchanged with microcontroller SPC56 board pin Signal L9679E J4 pin Figure 12. J4 connector for L9679E signals CS_G SCLK_G MOSI_G MISO_G CS_RS SCLK_RS MOSI_RS MISO_RS FEN1 FEN2 FENL SATSYNC RESET CON15 UM3145 - Rev 1 page 18/23... -
Page 19: Revision History
UM3145 Revision history Table 3. Document revision history Date Version Changes 03-Mar-2023 Initial release. UM3145 - Rev 1 page 19/23... -
Page 20: Table Of Contents
UM3145 Contents Contents Hardware description ............. . 2 Board schematics . - Page 21 UM3145 List of tables List of tables Table 1. Jumpers and connectors description ............7 Table 2.
- Page 22 L9679E-EVB evaluation board with soldered sample ........
- Page 23 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’...
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