Overview
The L9958SBTR, produced by STMicroelectronics, is an SPI-controlled H-Bridge designed for the control of DC and stepper motors in safety-critical applications and under extreme environmental conditions. This device is particularly suited for automotive and other high-reliability applications due to its robust protection features and advanced diagnostics capabilities.
Key Specifications
| Parameter | Specification |
|---|---|
| Operating Battery Supply Voltage | 4.0 V to 28 V |
| Operating Vdd Supply Voltage | 4.5 V to 5.5 V |
| Current Regulation Peak Threshold | Up to 8.6 A (typ.), in 4 steps |
| Full Path Ron | 100 mΩ (at Tj = -40 °C) to 300 mΩ (at Tj = 150 °C) |
| Logic Inputs | TTL/CMOS-compatible |
| Operating Frequency | Up to 20 kHz |
| SPI Interface | 16-bit for configuration/diagnostics, daisy chain capability |
| Protection Features | Over temperature, short circuit, VS undervoltage disable, Vdd undervoltage and overvoltage protection |
| Package | PowerSO-16 (medium power, lower cost) |
| Standby Current | <10 μA |
Key Features
- Programmable current regulation peak threshold by SPI up to 8.6 A (typ.)
- All pins withstand 19 V, Vs and output pins withstand 40 V
- Integrated free-wheel diodes with low side transistor switching to reduce power dissipation
- 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
- Detailed failure diagnostics on each channel via SPI: short circuit to battery, short circuit to ground, short circuit overload, over temperature
Applications
The L9958SBTR is designed for safety-critical applications, particularly in the automotive sector. It is suitable for controlling DC and stepper motors under extreme environmental conditions. Other potential applications include industrial automation, robotics, and any system requiring high reliability and advanced motor control.
Q & A
- What is the operating battery supply voltage range of the L9958SBTR?
The operating battery supply voltage range is 4.0 V to 28 V.
- What is the maximum current regulation peak threshold that can be set via SPI?
The maximum current regulation peak threshold that can be set via SPI is up to 8.6 A (typ.).
- What types of protection features does the L9958SBTR have?
The device has over temperature, short circuit, VS undervoltage disable, Vdd undervoltage, and Vdd overvoltage protection features.
- What is the purpose of the integrated free-wheel diodes?
The integrated free-wheel diodes reduce power dissipation by switching on the low side transistor in parallel with its diode during free-wheeling conditions.
- How does the L9958SBTR handle open-load detection?
The device can detect open-load conditions in the ON state.
- What is the standby current of the L9958SBTR?
The standby current is less than 10 μA.
- What is the significance of the 16-bit SPI interface?
The 16-bit SPI interface is used for configuration, diagnostics, and has daisy chain capability.
- What are the available package options for the L9958?
The device is available in PowerSO-20, PowerSO-16, and PowerSSO-24 packages.
- How does the device handle temperature-related issues?
The device has over temperature protection and a thermal warning bit set by SPI when the temperature exceeds 165 °C.
- What is the operating frequency of the L9958SBTR?
The operating frequency is up to 20 kHz.
