Overview
The L9958 is an SPI-controlled H-Bridge designed by STMicroelectronics for the control of DC and stepper motors in safety-critical applications and under extreme environmental conditions. This device is particularly suited for applications requiring robust protection mechanisms and precise control over motor operations. The H-Bridge is protected against over-temperature, short circuits, and undervoltage lockout for all supply voltages, ensuring reliable operation in demanding environments.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Operating Battery Supply Voltage | 4.0 V to 28 V | |
| Operating Vdd Supply Voltage | 4.5 V to 5.5 V | |
| Pins Withstand Voltage | 19 V | All pins |
| Output Pins Withstand Voltage | 40 V | Vs and output pins |
| Full Path Ron | 100 mΩ (at Tj = -40 °C) to 300 mΩ (at Tj = 150 °C) | |
| Logic Inputs Compatibility | TTL/CMOS-compatible | 3.3 V and 5 V CMOS |
| Operating Frequency | Up to 20 kHz | |
| SPI Interface | 16-bit, configuration/diagnostics, daisy chain capability | |
| Current Regulation Peak Threshold | 2.5 A to 8.6 A (Typ.), in 4 steps | Programmable via SPI |
| Protection Features | Over-temperature, short circuit, undervoltage, overvoltage | |
| Package Options | PowerSO-20, PowerSO16, PowerSSO24 | Different power and cost options |
Key Features
- Programmable current regulation peak threshold by SPI up to 8.6 A typ.
- Operating battery supply voltage from 4.0 V to 28 V and Vdd supply voltage from 4.5 V to 5.5 V.
- All pins withstand 19 V, and Vs and output pins withstand 40 V.
- Full path Ron from 100 mΩ (at Tj = -40 °C) to 300 mΩ (at Tj = 150 °C).
- Logic inputs TTL/CMOS-compatible.
- Operating frequency up to 20 kHz.
- 16-bit SPI interface for configuration/diagnostics with daisy chain capability.
- Protection against over-temperature, short circuits, undervoltage, and overvoltage.
- Open-load detection in ON condition and full diagnostics in OFF state.
- Enable and disable input with low standby current (<10 μA).
- Voltage and current slew-rate control for low EMI, programmable through SPI.
- Available in three power packages: PowerSO-20, PowerSO16, and PowerSSO24.
Applications
The L9958 is designed for the control of DC and stepper motors in various applications, particularly those requiring safety-critical and robust performance. Key application areas include:
- Automotive systems: For controlling motors in vehicles under extreme environmental conditions.
- Industrial automation: For precise control of DC and stepper motors in industrial settings.
- Robotics: For reliable and efficient motor control in robotic systems.
- Medical devices: Where safety and precision in motor control are crucial.
Q & A
- What is the L9958 and its primary function?
The L9958 is an SPI-controlled H-Bridge designed for controlling DC and stepper motors in safety-critical applications and under extreme environmental conditions.
- What are the operating voltage ranges for the L9958?
The operating battery supply voltage is from 4.0 V to 28 V, and the Vdd supply voltage is from 4.5 V to 5.5 V.
- What protection features does the L9958 offer?
The L9958 offers protection against over-temperature, short circuits, undervoltage, and overvoltage.
- How is current regulation managed in the L9958?
Current regulation peak threshold can be set by SPI from 2.5 A to 8.6 A (Typ.) in 4 steps.
- What is the significance of the SPI interface in the L9958?
The 16-bit SPI interface is used for configuration, diagnostics, and daisy chain capability.
- What are the available package options for the L9958?
The L9958 is available in three power packages: PowerSO-20, PowerSO16, and PowerSSO24.
- How does the L9958 handle open-load conditions?
The L9958 can detect open-load conditions in the ON state and provides full diagnostics in the OFF state.
- What is the standby current of the L9958?
The standby current of the L9958 is less than 10 μA.
- Can the L9958 control voltage and current slew rates?
Yes, the L9958 allows for voltage and current slew-rate control for low EMI, programmable through SPI.
- In which industries is the L9958 commonly used?
The L9958 is commonly used in automotive, industrial automation, robotics, and medical devices.
