Goal purposes embody electrical sunroof, window elevate, sliding doorways, and power-trunk elevate gate
The L99H92 automotive gate driver from STMicroelectronics offers an SPI port for programming and diagnostics, a cost pump, protecting options, and two extra current-sense amplifiers for system monitoring.
Containing two high-side and two low-side drivers, the L99H92 can management a single H-bridge powering one bidirectional DC motor or two half bridges for 2 unidirectional motors. Typical purposes for the extremely built-in and simply configurable driver embody electrical sunroof, window elevate, powered trunk, sliding doorways, and seat-belt pre-tensioners.
The cost pump powers the high-side drivers to keep up appropriate operation because the car battery voltage fluctuates, enabling the outputs to perform with a provide as little as 5.41V. The charge-pump output can be out there at an exterior pin to manage a MOSFET for reverse-battery safety.
The gate-driving present is programmed by way of the SPI port, permitting slew-rate management to attenuate electromagnetic emissions and thermal dissipation. Programming the present saves as much as 4 exterior discrete parts per MOSFET, usually wanted for slew-rate setting with typical drivers. The utmost drive present of 170mA provides designers flexibility to make use of the driving force with all kinds of exterior MOSFETs, together with high-power gadgets with giant gate capacitance.
With many options for system safety and diagnostics, the L99H92 is constructed for reliability and security. There’s overcurrent safety with a programmable threshold, detected by monitoring the MOSFET drain present. Additionally, cross-conduction safety with programmable lifeless time ensures security and effectivity. Extra safety consists of overtemperature early warning and shutdown, overvoltage and undervoltage safety on analog and digital energy provide inputs, and open-load and output short-circuit detection in off-state diagnostic mode.
A fail-safe enter can flip off all MOSFETs instantaneously and a devoted diagnostic pin offers quick fault warning with out ready for periodic SPI transfers.
Moreover, two current-sense amplifiers are built-in for system-status monitoring, serving to decrease the invoice of supplies. Appropriate for high-side, low-side, and inline sensing, the amplifiers have unbiased programmable achieve, low offset, and low thermal drift. They are often independently disabled to cut back present consumption when unused.
The L99H92 is in manufacturing now and packaged as a TQFP32 or QFN32 with wettable flanks to facilitate inspection. Pricing begins from $1.7062 within the QFN32 bundle and $1.7246 within the TQFP32 bundle, for orders of 1000 items. For additional data please go to: www.st.com/l99h92