The L99DZ320 is a door zone system IC providing electronic control modules with enhanced power management power supply functionality, including various standby modes, as well as LIN and CAN FD physical communication layers. The device has two low drop voltage regulators to supply the system microcontroller and external peripheral loads such as sensors and provide enhanced system standby functionality with programmable local and remote wake-up capability. Moreover, the 9 high-side drivers (8 to supply LEDs and 1 to supply bulbs) increase the system integration level; all the high-side drivers support the constant current mode for LED module with high input capacitance. Up to 3 DC motors and 4 external MOS transistors in H-bridge configuration can be driven in PWM mode up to 25 kHz. All the outputs are SC protected and implement an open-load diagnosis. The ST standard SPI interface (4.0) allows control and diagnosis of the device and enables generic software development.

• AEC-Q100 qualified
• 1 half bridge for 7.5 A load (R_ON = 100 mΩ)
• 1 half bridge for 6 A load (R_ON = 150 mΩ)
• 1 half bridge for 3 A load (R_ON = 300 mΩ)
• 1 configurable high-side driver for up to 1.5 A (R_ON = 300 mΩ) or 0.35 A (R_ON = 1600 mΩ) load
• 2 high-side drivers for 0.5 A (R_ON = 1.4 Ω)
• 6 high-side drivers for 0.15 A (R_ON = 7 Ω)
• CAN FD transceiver supporting communication up to 5 Mbit/s (ISO 11898-2/2016 and SAE J2284 compliant) with local failure and bus failure diagnosis
• LIN transceiver ISO 17987-4/2016 compliant
• Advanced lock & fold closing by means of PWM control on HB6 and HB4-HB5
• Advanced short-circuit detection on all the half bridges
• All HS drivers with constant current mode at startup to drive capacitive loads
• Internal 10-bit PWM timer for each standalone high-side driver
• Buffered supply for voltage regulators and 2 high-side drivers (HS15&HS0/both P-channel) to supply, for example, external contacts
• Programmable overcurrent recovery function, to drive loads with higher inrush currents as current limitation value (for HB4-HB6, HS7-HS9)
• Flexible HS drivers (HS7-HS15 and HS0), suitable to drive external LED modules with high input capacitance value
• Programmable periodic system wake-up feature
• Complete 2-channel contact monitoring interface, with programmable cyclic sense functionality, one of them also with DIR functionality
• Dedicated debug input pin
• Configurable window watchdog
• STMicroelectronics standard serial peripheral interface (32-bit/ST-SPI 4.0)
• Programmable reset generator for power-on and undervoltage
• Ultra low-quiescent current in standby modes
• No electrolytic capacitor required on regulator outputs
• Two 5 V voltage regulators for microcontroller and peripheral supply
• Central two-stage charge pumps
• Motor bridge driver for 4 external MOSFETs, in H-bridge configuration with short-circuit protection/diagnosis and openload diagnosis
• Diagnostic functions
• Current monitor output for all internal high-side drivers
• Digital thermal clusters
• The device contains temperature warning and protection
• Open-load diagnosis for all the outputs
• Overcurrent protection for all the outputs