NSL21912A-Q1HTSXR

Overview

The NSL21912A-Q1HTSXR is a 12-channel automotive-grade high-side LED driver manufactured by Novosense. It features an integrated PWM generator capable of producing linear or exponential brightness profiles for interior vehicle lighting applications such as dashboards, door lamps, and ambient lighting. The device utilizes internal oscillation to generate signals, with eleven channels dedicated to output control and one channel configured as a fault detection pin. Current regulation is achieved through high-side current sensing via an external shunt resistor, while the reference voltage (VREF) is set using an external resistor (RREF) and an internal 16-bit digital-to-analog converter (DAC).

Feature Summary

• Configurable PWM generation supporting linear or exponential brightness transitions.
• High-side current monitoring utilizing external shunt resistors for precise control.
• Integrated over-temperature protection that automatically reduces output current during thermal events.
• I2C communication interface with cyclic redundancy check (CRC) for reliable data transmission.

Applications

• Vehicle dashboard illumination systems
• Interior door lamp circuits
• Ambient lighting arrays

Procurement Notes

Verify the specific suffix HTSXR against official Novosense documentation to confirm tape-and-reel packaging specifications and moisture sensitivity level ratings. Ensure the component meets required automotive qualification standards before integration into safety-critical designs.

Selection Notes

Select this driver for complex automotive lighting architectures requiring multiple channels managed via I2C. The inclusion of address pins allows for bus expansion, making it suitable for systems needing cascaded control without signal conflicts.

Part Context

Novosense specializes in analog and mixed-signal chips for automotive electronics. This component belongs to their portfolio targeting body control modules and smart cockpit systems, providing specialized solutions for high-reliability LED driving within electric and conventional vehicles.

Replacement Considerations

No public substitute part numbers are confirmed for this specific model. Verify compatibility with existing PCB footprints and firmware protocols when considering alternative drivers.

FAQ

How is the output current regulated?

Output current is controlled via high-side sensing using an external shunt resistor, with the reference voltage set by an external resistor and an internal 16-bit DAC.

What happens during an over-temperature event?

The chip features automatic over-temperature protection that reduces output current to prevent damage when safe temperature limits are exceeded.