LED drivers serve as the core of reliable light control in automotive, general lighting, and display applications, directly determining brightness stability, energy efficiency, and product lifespan. ROHM Semiconductor, a global leader in power management semiconductors, delivers a comprehensive portfolio of LED drivers engineered for automotive harsh environments and professional lighting scenarios. Covering synchronous buck/boost topologies, multi-channel control, and proprietary dimming technologies, ROHM’s products (including the flagship BD series) meet AEC-Q100 automotive standards and industrial-grade reliability requirements. To ensure genuine procurement, stable inventory, and professional technical support, ROHM partners with top-tier authorized distributors worldwide, enabling seamless access to these mission-critical components for manufacturers and designers.

Core Product Lines & Technical Advantages

ROHM’s LED drivers stand out for their tailored performance, integration capabilities, and robustness, with specialized solutions for automotive and lighting applications:

1. Automotive-Grade LED Drivers (AEC-Q100 Certified)

Optimized for vehicle interior/exterior lighting and displays, these drivers feature strict temperature resilience and safety protections:

• BD82A26MUF-M: A flagship automotive backlight driver with 6-channel current control, integrated boost DC/DC converter, and ROHM’s proprietary Nano Cap™ technology. Supports 3V-48V input, 50V max output, and 900mA total current (150mA per channel), ideal for HUDs, instrument clusters, and infotainment displays. Equipped with analog+PWM mixed dimming (20,000:1 dimming ratio) and spread spectrum function to eliminate flicker, compliant with AEC-Q100 Grade 1 (-40℃~125℃).

• BD18347A: 4-channel constant current LED driver with 40V voltage tolerance, built-in energy sharing control for compact PCB design . Features LED open/short detection, over-voltage protection, and thermal shutdown, suitable for automotive headlights, DRLs, and fog lamps.

• BD18397RUV-M: 2-channel synchronous buck LED driver with on-time topology, ensuring precise current regulation over wide input/output ranges . Enables fast duty cycle adjustment and average current feedback, ideal for automotive interior lighting and ambient light systems.

2. General Lighting LED Drivers

Designed for efficiency and versatility in commercial and residential lighting:

• Multi-Channel Linear Drivers: BD1834x-M series 4-channel linear drivers with enhanced DC dimming, supporting simple drive for low-current lighting applications . Compact SMD packages and low power consumption make them suitable for downlights and panel lights.

• Synchronous Buck Drivers: Optimized for high-power general lighting, featuring high conversion efficiency (up to 95%) and wide input voltage ranges (12V-48V). Supports PWM dimming up to 25kHz to avoid audible noise, meeting global lighting energy efficiency standards.

3. Key Technological Advantages

• Nano Cap™ Technology: Proprietary technology that enables stable operation with nF-level output capacitance, reducing component size and BOM cost for automotive displays ROHM.

• Hybrid Dimming Solutions: Combines analog and PWM dimming to achieve ultra-wide dimming ratios (up to 20,000:1) without flicker, critical for automotive displays and professional lighting .

• Comprehensive Protection Mechanisms: All models integrate over-voltage (OVP), under-voltage lockout (UVLO), thermal shutdown (TSD), and LED open/short protection, ensuring system reliability in harsh environments

• Automotive-Grade Compliance: AEC-Q100 qualification (Grade 1/2) and anti-sulfuration components compatibility, adapting to under-hood and interior automotive environments