STMicroelectronics L98GD8 Automotive MOSFET Pre-Driver
STMicroelectronics L98GD8 Automotive MOSFET Pre-Driver is configurable for low-side, high-side, peak and hold, and H-bridge load control. This AEC-Q100 qualified pre-driver is designed to comply with the requirements of automotive passenger vehicles with 12V and 48V battery systems. The L98GD8 MOSFET pre-driver also complies with automotive commercial vehicles' 24V battery systems. This pre-driver's outputs can be PWM controlled, while six outputs are capable of driving safety-relevant loads. Each output provides full diagnostic information, such as short to battery, short to ground, and open-load. The L98GD8 MOSFET pre-driver can also drive up to two loads requiring a peak and hold control strategy. Typical applications include driving relays, motors, and all the resistive and inductive loads.
Features
- AEC-Q100 qualified
- 12V, 24V, and 48V battery systems compliance
- 3.3V and 5V logic compatible I/O
- 8-channel configurable MOSFET pre-driver:
- High-side (N-channel and P-channel MOS)
- Low-side (N-channel MOS)
- H-bridge (up to 2 H-bridge)
- Peak and hold (2 loads)
- 3.8V to 58V operating battery supply voltage range
- 4.5V to 5.5V operating VDD supply voltage
- Programmable gate charge/discharge currents for improving EMI behavior
- Individual diagnosis for:
- Short circuit to battery
- Open load
- Short circuit to ground
- Highly flexible overcurrent sensing implementation:
- Possibility of monitoring external MOS drain to source voltage
- Possibility of monitoring voltage on external shunt resistor
- 64 programmable overcurrent thresholds independent for each channel
- Ultra-fast output shutdown in case of overcurrent
- Current limitation for H-Bridge configuration
- 32-bit SPI protocol available for configuration and diagnostics:
- Failures are latched even if they occur during diagnostics reading
- Daisy chain operation
- SDO is protected against overvoltage
- Safety features:
- Fast switch off redundant output disabled by two external pins
- Built-in Self Test (BIST) for logic operation
- Hardware Self Check (HWSC) for VDD5 overvoltage comparator
- Configurable Communication Check (CC) watchdog timer available
- Disable feedback by bi-directional pin
- Highly redundant output monitoring by dedicated SPI registers
- 10-bit ADC for battery and die temperature measurements available by SPI
- VDD5 monitoring for over/under voltage
- VPS (battery) monitoring for undervoltage
Applications
- Automotive 12V, 24V, and 48V
- Low-side, high-side, peak and hold, and H-Bridge load control
- Designed for driving relays, motors, and all the resistive and inductive loads
Block Diagram
Videos
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