ST’s L9800 combines eight low-side drivers with diagnostics and safety in a compact leadless bundle for tight automotive areas. The ISO 26262 ASIL-B-compliant system drives resistive, capacitive, or inductive hundreds—resembling relays and LEDs—in body-control modules, HVAC programs, and power-domain controls.
Output channels may be managed through the SPI port or two devoted parallel inputs that map to chose outputs. These inputs allow emergency {hardware} management of two default channels even when the digital provide voltage shouldn’t be obtainable. This enables the L9800 to enter limp-home mode, sustaining important security and comfort features throughout system failures, resembling microcontroller faults or provide undervoltage.
The L9800 enhances automobile reliability with real-time diagnostics and per-channel safety towards open-circuit, short-circuit, overcurrent, and overtemperature faults. Diagnostic alerts are accessible over the SPI bus, which additionally permits entry to inside configuration registers for system setup. Moreover, the motive force ensures secure operation throughout engine cranking, supporting battery voltages as little as 3 V.
Housed in a 4×4-mm TFQFN24 bundle, the L9800 low-side driver prices $0.52 every in a lot of 1000 items.
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