Overview
The L9660, produced by STMicroelectronics, is a quad squib driver ASIC designed specifically for safety applications, particularly in the automotive sector. This integrated circuit is intended to deploy up to four squibs, each with precise control over firing current and duration. The L9660 is engineered to meet the stringent requirements of automotive safety systems, such as airbag deployment.
The device features full diagnostic capabilities of the squib interface, ensuring robust and reliable operation. It operates within a wide voltage range and includes various safety and diagnostic features to ensure the integrity of the system.
Key Specifications
| Parameter | Description |
|---|---|
| Package | LQFP64 (10x10x1.4 mm) |
| Technology | ST proprietary BCD5 (0.65μm) |
| Operating Temperature | -40°C to +95°C |
| Firing Current | 1.2 A (min)/2 ms, 1.75 A (min)/1 ms, 1.75 A (min)/0.65 ms between VRES of 7 V to 37 V |
| Firing Current (VRES < 25V) | 1.5 A (min)/2 ms |
| SPI Interface | 5.5 MHz |
| ESD Capability | 2 kV on all pins |
| RoHS Compliance | Ecopack2 |
Key Features
- 4 deployment drivers with SPI selectable firing current and times
- Capability to deploy all channels simultaneously
- Independently controlled high-side and low-side MOS for diagnosis
- Analog output available for resistance measurement
- Squib short to ground, short to battery, and MOS diagnostic available on SPI register
- Capability to deploy the squib when the low side MOS is shorted to ground
- 2 fire enable inputs
- Low voltage internal reset
Applications
The L9660 is primarily used in automotive safety systems, particularly for airbag deployment. Its robust design and comprehensive diagnostic features make it suitable for other safety-critical applications where precise control over squib deployment is necessary.
Q & A
- What is the primary function of the L9660?
The L9660 is a quad squib driver ASIC designed to deploy up to four squibs with precise control over firing current and duration.
- What are the firing current specifications of the L9660?
The L9660 can deploy squibs with 1.2 A (min)/2 ms, 1.75 A (min)/1 ms, and 1.75 A (min)/0.65 ms between VRES of 7 V to 37 V, and 1.5 A (min)/2 ms for VRES voltages less than 25 V.
- What type of package does the L9660 come in?
The L9660 comes in an LQFP64 package (10x10x1.4 mm).
- What is the operating temperature range of the L9660?
The operating temperature range is -40°C to +95°C.
- Does the L9660 support simultaneous deployment of all channels?
- What diagnostic features does the L9660 offer?
The L9660 offers independently controlled high-side and low-side MOS for diagnosis, squib short to ground, short to battery, and MOS diagnostic available on the SPI register.
- What is the SPI interface frequency of the L9660?
The SPI interface operates at 5.5 MHz.
- Is the L9660 RoHS compliant?
- What is the ESD capability of the L9660?
The L9660 has a 2 kV ESD capability on all pins.
- In what safety-critical applications is the L9660 typically used?
The L9660 is typically used in automotive safety systems, particularly for airbag deployment.
