Overview
The L9524C is a control IC designed by STMicroelectronics for managing up to six glow plugs in diesel engines. This integrated circuit is capable of switching the glow plugs using up to four external PWM-controlled N-channel Power MOSFETs or a single relay in high-side configuration. It monitors various parameters including supply voltage, battery voltage, junction temperature, currents through the glow plugs, and charge pump voltage. The IC communicates with the diesel engine management system via a two-wire interface, ensuring robust and efficient control over the glow plug system.
Key Specifications
| Parameter | Description |
|---|---|
| Package | SO-24 (0.295", 7.50mm Width) |
| Operating Temperature | -40°C to 125°C |
| Supply Voltage | 5 V to 18 V |
| Supply Current | 5 mA |
| Mounting Type | Surface Mount |
| RoHS Compliance | Ecopack1 |
| Grade | Automotive |
Key Features
- Quad gate driver for external N-channel Power MOSFETs in high-side configuration:
- Gates driven by PWM output signal
- Adjustable gate charge/discharge currents
- Limited gate-to-source voltages
- Negative clamping for inductive loads
- Advanced run-off control
- Regulation of the power through the glow plugs
- Control output for external relay driver
- Battery-voltage-compatible two-wire interface
- Supply voltage monitoring with shutdown
- Battery voltage monitoring with shutdown
- Junction temperature monitoring with shutdown
- Monitoring of currents through the glow plugs with shutdown at overcurrent (adjustable threshold)
- Monitoring of external switches
- Charge pump voltage monitoring with shutdown
- Active clamping during load dump
Applications
The L9524C is primarily used in automotive applications, specifically for controlling the glow plug systems in diesel engines. Its robust monitoring and control features make it an essential component in diesel engine management systems.
Q & A
- What is the primary function of the L9524C IC?
The L9524C is a control IC designed to manage up to six glow plugs in diesel engines.
- How are the glow plugs switched in the L9524C?
The glow plugs are switched by up to four external PWM-controlled N-channel Power MOSFETs or a single relay in high-side configuration.
- What parameters does the L9524C monitor?
The IC monitors supply voltage, battery voltage, junction temperature, currents through the glow plugs, and charge pump voltage.
- How does the L9524C communicate with the diesel engine management system?
It communicates via a two-wire interface.
- What is the operating temperature range of the L9524C?
The operating temperature range is -40°C to 125°C.
- What is the supply voltage range for the L9524C?
The supply voltage range is 5 V to 18 V.
- Does the L9524C support RoHS compliance?
Yes, it is RoHS compliant with an Ecopack1 grade.
- What type of package does the L9524C come in?
The L9524C comes in a SO-24 package.
- What are some key features of the L9524C's gate driver?
The gate driver features include gates driven by PWM output signal, adjustable gate charge/discharge currents, limited gate-to-source voltages, and negative clamping for inductive loads.
- Does the L9524C have overcurrent protection?
Yes, it monitors currents through the glow plugs with shutdown at overcurrent (adjustable threshold).
