Overview
The L9958XP, 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 sectors due to its robust protection features and advanced diagnostic capabilities.
Key Specifications
| Parameter | Value |
|---|---|
| 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, undervoltage lockout, overvoltage detection |
| Package Options | PowerSO-20, PowerSO16, PowerSSO24 |
| Standby Current | <10 μA |
Key Features
- Programmable current regulation peak threshold by SPI up to 8.6 A (typ.)
- Detailed failure diagnostics on each channel via SPI: short circuit to battery, short circuit to ground, short circuit overload, over temperature
- Open-load detection in ON condition
- Full diagnostics in OFF state
- Enable and disable input
- Low standby current (<10 μA)
- Voltage and current slew-rate control for low EMI, programmable through SPI
- Integrated free-wheel diodes with low side transistor switching to reduce power dissipation during free-wheeling conditions
- Multiple wire bonding technique and ST proprietary package design for maximum flexibility
Applications
The L9958XP is primarily used in safety-critical applications, particularly in the automotive sector, for controlling DC and stepper motors. Its robust protection features and advanced diagnostic capabilities make it suitable for use under extreme environmental conditions.
- Automotive systems
- Industrial automation
- High-reliability motor control systems
Q & A
- What is the operating battery supply voltage range of the L9958XP?
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 is up to 8.6 A (typ.) in 4 steps.
- What types of protection features does the L9958XP have?
The L9958XP has over temperature, short circuit, undervoltage lockout, and overvoltage detection protection features.
- What is the standby current of the L9958XP?
The standby current is less than 10 μA.
- Does the L9958XP support daisy chaining?
- What are the package options available for the L9958XP?
The package options include PowerSO-20, PowerSO16, and PowerSSO24.
- How does the L9958XP handle free-wheeling conditions?
In free-wheeling conditions, the low side transistor is switched on in parallel with its diode to reduce power dissipation.
- What is the operating frequency of the L9958XP?
The operating frequency is up to 20 kHz.
- Are the logic inputs of the L9958XP TTL/CMOS-compatible?
- Can the voltage and current slew-rate be controlled for low EMI?
