Блог компании TPS92682QRHMRQ1 Dual-Channel Automotive-Grade LED Driver: Empowering Smart Automotive Lighting Systems

TPS92682QRHMRQ1 Dual-Channel Automotive-Grade LED Driver Controller—Supports Multiple Topologies to Enable Next-Generation Smart Automotive Lighting Designs

I. TPS92682QRHMRQ1 Product Overview

The TPS92682QRHMRQ1 is a dual-channel, constant-voltage/constant-current (CV/CC) LED driver controller from Texas Instruments, designed specifically for demanding applications such as automotive lighting. Through a flexible SPI interface, this device can be configured for constant-voltage (CV) or constant-current (CC) mode and supports various topologies, including Boost, Buck, Buck-Boost, Flyback, SEPIC, and Ćuk, providing efficient LED drive solutions for automotive headlights, daytime running lights (DRL), fog lights, turn signals, and interior ambient lighting.

The TPS92682QRHMRQ1 is certified to AEC-Q100 Grade 1 automotive standards and operates within a temperature range of -40°C to +125°C (with a junction temperature of up to 150°C), ensuring long-term, stable operation in harsh automotive environments.

II. TPS92682QRHMRQ1 Key Features and Technical Advantages

1. Wide Input Voltage Range

Supports a wide input voltage range of 4.5 V to 65 V, covering 12 V, 24 V, and 48 V automotive battery systems, and accommodating complex power supply scenarios such as vehicle startup and sudden load drops.

2. Dual-Channel Independent Control

Two independent output channels, each capable of driving multiple series-connected LED loads

Supports up to 5 A of external MOSFET drive capability per channel

3. High-Precision Current Control

±4% LED current accuracy (over a junction temperature range of -40°C to 150°C)

Supports analog dimming and PWM dimming, with a PWM dimming ratio exceeding 1000:1, meeting the need for wide brightness adjustment from day to night

4. Flexible Topology Support

Supports buck, boost, buck-boost, flyback, SEPIC, and Ćuk topologies to accommodate various LED string configurations.

5. SPI Programmable Features

Configurable via the SPI interface:

Spread spectrum modulation—improves EMI performance

Soft-start time

LED current and output voltage settings

Current limit, overvoltage protection, and fault timer

Single-phase/bi-phase operating modes

6. Comprehensive Fault Protection

Cycle-by-cycle overcurrent protection

LED open-circuit/short-circuit detection

Output overvoltage/undervoltage protection

Over-temperature shutdown protection

Open-drain fault flag output (independent per channel)

7. Programmable Switching Frequency

Supports adjustable switching frequencies from 100 kHz to 1 MHz, as well as external clock synchronization, facilitating optimization of PCB size and efficiency.

III. Typical Application Scenarios

Automotive Headlight Systems

The TPS92682QRHMRQ1 provides precise constant-current drive for matrix LED headlights and adaptive high beams (ADB), ensuring brightness consistency across multi-pixel light sources.

Daytime Running Lights (DRL) and Fog Lights

Its wide input voltage range and high efficiency ensure stable output even under complex operating conditions such as cold starts and voltage fluctuations, thereby ensuring driving safety.

Interior Ambient Lighting and Instrument Panel Backlighting

Dual-channel independent control and high-precision PWM dimming enable smooth dynamic color transitions and brightness adjustments, enhancing the cabin’s high-tech feel and user experience.

Multi-Topology Adaptability

Through flexible topology configuration, a single chip can support different types of LED strings (boost topology for multi-string LEDs, buck topology for low-voltage LEDs), reducing the variety of components and simplifying supply chain management.

IV. Design Support and Resources

Package: 32-VFQFN (5 mm × 5 mm), with wettable flanks for easy AOI optical inspection

Operating Temperature: -40°C to +125°C (TA)

Functional Safety: TI provides functional safety documentation to support system-level functional safety design

Standard Packaging: 3,000 pieces per tape and reel

V. Summary

With core advantages such as dual-channel independent control, wide input voltage range, support for multiple topologies, and SPI programmability, the TPS92682QRHMRQ1 provides a highly flexible, reliable, and efficient solution for automotive lighting system design. Whether for headlights, daytime running lights, fog lights, or interior ambient lighting, this device helps engineers simplify design, accelerate time-to-market, and meet the AEC-Q100 automotive quality standard.

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