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UM2921
User manual
EVAL-L99H02XP Evaluation board
Introduction
The EVAL-L99H02XP is an evaluation board designed to control 4 external N-channel MOS transistor in bridge configuration for
DC-motor driving in automotive applications.
UM2921 - Rev 1 - November 2021
www.st.com
For further information contact your local STMicroelectronics sales office.
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Summary of Contents for ST EVAL-L99H02XP
- Page 1 UM2921 User manual EVAL-L99H02XP Evaluation board Introduction The EVAL-L99H02XP is an evaluation board designed to control 4 external N-channel MOS transistor in bridge configuration for DC-motor driving in automotive applications. UM2921 - Rev 1 - November 2021 www.st.com For further information contact your local STMicroelectronics sales office.
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Page 2: Eval-L99H02Xp Board
EVAL-L99H02XP assembled in the daughterboard. With the aim to make the board usage and setting simpler, STM provides a dedicated Graphic User Interface (GUI). This enables the user to set EVAL-L99H02XP parameters and at the same time it shows real time device information. -
Page 3: Hardware Description And Setup
EVAL-L99H02XP block diagram L99H02XP Motherboard schematic A universal motherboard is used to control and drive the daughterboard containing the EVAL-L99H02XP. The motherboard has the following functions: • USB-to-UART conversion: a FT232RL USB to serial UART interface is used to convert the data from the GUI, in the PC, in commands that are processed by the microcontroller. -
Page 4: Figure 3. Stm8 Uni Board - I/O And Body
UM2921 Motherboard schematic Figure 3. STM8 Uni board - I/O and body UM2921 - Rev 1 page 4/18... -
Page 5: Figure 4. Stm8 Uni Board - Usb Interface
UM2921 Motherboard schematic Figure 4. STM8 Uni board - USB interface UM2921 - Rev 1 page 5/18... -
Page 6: Figure 5. Stm8 Uni Board - Stm8 And Supply
UM2921 Motherboard schematic Figure 5. STM8 Uni board - STM8 and supply UM2921 - Rev 1 page 6/18... -
Page 7: Daughterboard Schematic
1 temperature sensor LM135. • 1 DC motor connector. • 1 reverse battery network and VB connector. • 1 H-bridge. The schematic and BOM of the daughterboard can be found on the ST website. UM2921 - Rev 1 page 7/18... -
Page 8: Figure 6. Eval-L99H02Xp Daughterboard Schematic
UM2921 Daughterboard schematic Figure 6. EVAL-L99H02XP daughterboard schematic UM2921 - Rev 1 page 8/18... -
Page 9: Motherboard Layout
UM2921 Motherboard layout Motherboard layout The EVAL-L99H02XP motherboard was designed in a 2 layers board. Motherboard Top and Bottom layers are shown in the Figure 7 Figure 8. Gerber files of the motherboard can be found in the ST website Figure 7. -
Page 10: Daughterboard Layout
Different choice regarding the number of the layers can be used. A two-layers or an N-layers (where N can be 3 or 4) application board can be used to develop the board for the L99H02XP application. A 4 layers solution was chosen to design the EVAL-L99H02XP daughterboard to increase the ground area on which to disperse the heat. -
Page 11: Figure 11. Inner 2
UM2921 Daughterboard layout Figure 11. Inner 2 Figure 12. Assembly Bottom UM2921 - Rev 1 page 11/18... -
Page 12: Board Connection And Setup
UM2921 Board connection and setup Board connection and setup Figure 13 shows the placement of the components on the motherboard. Also, the placement of the connectors to be used to supply the evaluation board and to connect with a host PC through USB cable are shown. - Page 13 UM2921 Board connection and setup Jumpers of the motherboard are already set in their default position. Table 1. Motherboard jumper configuration Jumper Description Default position +5 V_DB Not present +5 V_STM8 Present USART USART Reset STM8 Swim STM8 UM2921 - Rev 1 page 13/18...
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Page 14: Revision History
UM2921 Revision history Table 2. Document revision history Date Version Changes 02-Nov-2021 Initial release. UM2921 - Rev 1 page 14/18... -
Page 15: Table Of Contents
EVAL-L99H02XP board ........ - Page 16 UM2921 List of tables List of tables Table 1. Motherboard jumper configuration ............13 Table 2.
- Page 17 EVAL-L99H02XP daughterboard schematic ........
- Page 18 ST’s terms and conditions of sale in place at the time of order acknowledgement. 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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