Melexis Technologies NV EVB81112-A1

Overview

EVB81112-A1 from Melexis is an evaluation board for the MLX81112 single-channel LIN RGB LED controller IC in SOIC8 package, featuring 32kB Flash + 16kB ROM, 4× high-voltage I/Os (up to 48mA), and 4× 16-bit PWM outputs for automotive-grade RGB lighting control. It enables rapid validation of LIN 2.x-compliant color/brightness management in interior ambient lighting modules.

For engineers reviewing the EVB81112-A1 datasheet, pinout, applications, or equivalent options, this board provides hardware-level access to HV0–HV3 current sources, LIN_IN/LIN_OUT transceiver signals, VS supply monitoring, and debug interface pins - supporting firmware development, LIN bus timing verification, and LED aging compensation algorithm testing.

Technical Context

The EVB81112-A1 implements a complete reference design around the MLX81112 IC, integrating external decoupling (2.2µF + 47nF), LIN bus shunt circuitry (180pF), and direct connection to RGB LED loads via HV0–HV3. It supports all six hardware modes defined in the IC's operating conditions, including Sleep Mode with <25µA standby current and Autoconfig-enabled LIN bus initialization.

Board-level features include jumper-selectable LIN termination, test points for VS, GND, LIN_IN, LIN_OUT, and HVx outputs, and solder pads compatible with standard SOIC8-NB footprint (4.80 × 3.81 mm). The layout adheres to automotive ESD and ISO 7637-2 pulse immunity requirements per MLX81112's absolute maximum ratings.

Key Specifications

Availability

EVB81112-A1 is available at Aetrix Electronics and suitable for automotive interior lighting development, LIN-based RGB module prototyping, and OEM LED driver qualification requiring stable component supply and traceable evaluation hardware.

Supply support for EVB81112-A1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Melexis is a Belgian semiconductor company specializing in sensor and driver ICs for automotive and industrial applications, with core expertise in magnetic sensing, thermal imaging, and intelligent LED control solutions.

The MLX81112 product line delivers integrated LIN-based RGB lighting controllers optimized for automotive ambient lighting systems, combining MCU, LIN transceiver, high-voltage I/Os, and precision PWM in a single SOIC8 package.

FAQ

What is the primary function of the EVB81112-A1 evaluation board?

The EVB81112-A1 evaluation board is designed exclusively to demonstrate and validate the MLX81112 single-channel LIN RGB controller IC. It provides full electrical access to all HV0–HV3 current outputs, LIN_IN/LIN_OUT transceiver pins, VS supply monitoring, and debug interface signals. Engineers use EVB81112-A1 to develop firmware, verify LIN bus timing compliance, test LED aging compensation algorithms, and characterize PWM dimming performance before integration into final automotive lighting modules.

Does EVB81112-A1 support dual RGB LED channels like the MLX81115?

No. EVB81112-A1 is specifically configured for the MLX81112 IC, which supports only a single RGB channel via four high-voltage I/Os (HV0–HV3). It does not provide connections or layout support for the additional HV4/HV5 pins used by the MLX81115 DFN12 variant. For dual-channel evaluation, Melexis offers separate hardware (e.g., EVB81115-A1), and EVB81112-A1 cannot be modified to emulate MLX81115 functionality due to fundamental differences in pin count, package, and internal routing.

Can EVB81112-A1 operate directly from a 12V automotive battery without external regulation?

Yes. EVB81112-A1 accepts 5.5V to 18V DC input on the VS rail and is designed to operate directly from a nominal 12V automotive battery. Its layout incorporates recommended external capacitors (2.2µF bulk + 47nF ceramic) and withstands transient pulses per ISO 7637-2, including +45V pulse 5b (28V jump-start). No external voltage regulator is required, though reverse-polarity protection must be implemented externally as specified in the MLX81112 datasheet.

How is LIN Autoconfig implemented on EVB81112-A1?

EVB81112-A1 implements LIN Autoconfig using the bus shunt method defined in the MLX81112 datasheet. It routes LIN_IN and LIN_OUT through a 180pF capacitor to enable automatic node address assignment during bus initialization. The board includes selectable termination jumpers to configure master/slave behavior and supports both LIN 2.x and SAE J2602 frame processing without host MCU intervention - allowing standalone validation of slave node discovery and response timing.

Is EVB81112-A1 RoHS-compliant and qualified for automotive reflow soldering?

Yes. EVB81112-A1 uses RoHS-compliant components and PCB finish, and its layout follows Melexis' reflow soldering guidelines per IPC/JEDEC J-STD-020. The board is qualified for standard lead-free reflow profiles (peak temperature ≤260°C, time above 217°C ≤60 seconds) and meets moisture sensitivity level (MSL) requirements for surface-mount assembly. Full qualification data and soldering recommendations are published on Melexis' official website under Quality & Soldering resources.