NXP Semiconductors FS23 Safety System Basis (SBC) PMICs

NXP Semiconductors FS23 Safety System Basis (SBC) PMICs are pin-to-pin / software compatible and include CAN / LIN transceivers, along with a number of system and safety features for emerging automotive electronic control units (ECU). The FS23 SBC is scalable from the linear voltage regulator version to the DC-DC regulator version and from QM to ASIL B. These devices provide a high level of integration to optimize the bill of material (BOM) cost for the body and comfort market.

The highly flexible PMICs are suitable for S32K processor-based applications and multi-vendor processors. Several device versions are available, offering choices in output-voltage settings, operating frequency, power-up sequencing, and input/output configurations to address multiple applications.

Features

Power management
- HVBUCK: Synchronous buck converter with integrated FETs. Configurable Normal mode output voltage and LPON mode output voltage (3.3V or 5.5V). Output DC current capability of 400mA in Normal mode, and 100mA current capability in Low-power ON mode
- HVLDO1: High-voltage LDO instead of the HVBUCK for MCU supply with selectable output voltage (3.3V or 5.5V) and up to 100mA DC current capability with internal PMOS and 250mA with external PNP
- HVLDO2: High-voltage LDO regulator for system loads, with optional external protection for off-board sensors, selectable output voltage (3.3V or 5.0V), and up to 100mA DC current capability
- HVLDO3: High-voltage LDO regulator for CAN FD block supply or other with selectable output voltage (3.3V or 5.0V) and up to 150mA current capability
System features
- 1x CAN FD supporting up to 2Mbps communication following ISO 11898-2:2016 and SAE J2284 standards
- 1x LIN following LIN 2.2, ISO 17987-4 and SAE-J2602-2 standards
- 2x wake-up inputs (40V capable)
- 2x high-voltage I/Os with wake-up capability (40V capable)
- Up to 4x low-voltage I/Os with wake-up capability
- 4x configurable high-side drivers with 150mA drive capability, to supply LEDs or enable external devices (INH), and cyclic-sense capability
- Multiple wake-up sources: WAKE pins, HVIO pins, LVIO pins, CAN FD, LIN or dedicated SPI/I²C command
- Device control via 32-bit SPI interface or via I²C interface, with CRC
- Integrated long-duration timer (LDT) for system shutdown and wake-up control, programmable for up to 194x days
- 16-channel analog multiplexer (AMUX) for system monitoring (temperature, battery voltage, and internal voltages)

Operating modes
- Normal mode with all power management and functional safety features available
- Stop mode: Low-power OFF mode with multiple wake-up sources (LPOFF)
- Standby mode: Low-power ON mode with HVBUCK or HVLDO1 active and multiple wake-up sources (LPON)
Functional safety
- Developed following ISO 26262:2018 standard to fit ASIL B applications
- Internal monitoring circuitry with its own reference
- Additional input for external voltage monitoring
- Window or timeout watchdog function to monitor the MCU failures by software
- FCCU inputs to monitor MCU failures by hardware
- Analog built-in self-test (ABIST) on demand
- Safety outputs (RSTB, FS0B, LIMP0, and LIMP1/2 with 1.25Hz or 100Hz PWM capability)
Configuration and enablement
- QFN48EP: QFN 48-pins with exposed pad for optimized thermal management, wettable flanks, 7mm x 7mm x 0.85mm, 0.5mm pitch, 48-pins
- One-time programmable (OTP) memory for scalability, expandability, and device customization
- OTP emulation mode for system development and evaluation
-40°C to +125°C operating temperature range

Applications

Body control modules
HVAC
Lighting
Steering column locks
Seat modules
Roof modules

Door control modules
Car access
Gearshifts
Seat belt pre-tension
Tailgates
Alarms

NXP Semiconductors FS23 Safety System Basis (SBC) PMICs

Features

Applications

Functional Block Diagram

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