The NSL21924 is a 24-channel automotive-grade high-side LED driver with 100mA output current capability per channel. It supports flexible 2-bit global and 6-bit independent current settings, along with configurable 12-bit PWM dimming.
The NSL21924 incorporates the innovative Supply Thermal Sharing technology, which reduces the driver IC's temperature rise and enhances current drive capability.
This device features diagnostic functions including LED open-circuit detection, short-circuit protection, and single-LED short detection. In case of MCU communication failures, its built-in configurable watchdog timer automatically activates fail-safe states. Combined with the programmable EEPROM, the NSL21924 allows flexible configuration of fail-safe parameters for diverse applications.
The NSL21924A is an extended part number (PN) of the NSL21924 with default address expansion. Without requiring EEPROM programming, the NSL21924A achieves an 8-bit address extension design through its Addr pins.
Product Features
• Qualified for Automotive Grade 1: Tj from -40℃ to 150℃
• 24-channel high side current sources, 100mA output current capacity per channel
• 12-bit independent PWM dimming
• Phase shift PWM dimming
• Low dropout voltage 600mV max. at 50mA
• Innovative thermal sharing based on VS Supply Shunt resistors
• UART protocol-based communication interface, supporting up to 2 Mbps data rate
• Configurable LED open and LED short detect threshold
• Full protections and diagnostics
• Built-in EEPROM for Fail Safe safety requirements
• ASIL-B functional safety option available
• HTSSOP38 Package
Application
• Automotive rear lighting
• Automotive exterior lighting
• Automotive ISD/ISC application
• General automotive body lighting applications
Functional Block Diagram
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