STMicroelectronics EV-L99LDLH32GEN

Overview

EV-L99LDLH32GEN from STMicroelectronics is an evaluation board pre-assembled with two L99LDLH32 32-channel linear current regulators, designed for automotive exterior OLED rear lighting systems. It supports CAN FD Light serial interface (up to 1 Mbit/s), integrates a high-precision oscillator, and enables stand-alone or bus-mode operation across 5.5–40 V supply and –40 °C to 150 °C ambient temperature.

For engineers reviewing the EV-L99LDLH32GEN datasheet, EV-L99LDLH32GEN pinout, EV-L99LDLH32GEN application, or EV-L99LDLH32GEN equivalent, this board provides rapid prototyping of dual-channel OLED pixel current control with integrated diagnostics, NTC-based thermal derating, and fail-safe limp-home operation under ASIL-compliant configurations.

Technical Context

The EV-L99LDLH32GEN implements two independent L99LDLH32 ICs in high-side constant-current configuration, each delivering 32 individually programmable outputs (1–15 mA) with up to 35 V compliance voltage. It embeds CAN FD Light physical layer and protocol handler per device, eliminating external transceivers or firmware stacks.

Each L99LDLH32 integrates an 8-bit ADC for full diagnostic coverage, dedicated fault bus signaling, and internal non-volatile memory for configuration retention. The board supports analog dimming, per-channel exponential PWM brightness control, global PWM dimming, and dithered clock generation to reduce EMC emissions.

Key Specifications

Availability

EV-L99LDLH32GEN is available at Aetrix Electronics and suitable for automotive lighting development, OLED panel validation, and CAN FD Light protocol integration requiring stable component supply and traceable sourcing.

Supply support for EV-L99LDLH32GEN 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad IP and manufacturing scale.

The L99LDLH32 product line targets ASIL-B compliant automotive exterior lighting, delivering high-channel-count, high-voltage linear LED/OLED drivers with integrated safety and communication features for next-generation rear lamp modules.

FAQ

What is the primary function of the EV-L99LDLH32GEN board?

The EV-L99LDLH32GEN is an evaluation platform for two L99LDLH32 32-channel linear current regulators. It enables rapid validation of OLED pixel current control, CAN FD Light communication, thermal derating via NTC inputs, and fail-safe operation in automotive rear lighting applications without requiring custom PCB design.

Does the board support standalone operation without a host microcontroller?

Yes. Each L99LDLH32 supports stand-alone mode using internal few-time programmable (FTP) memory registers. Configuration can be set once and retained, enabling limp-home functionality during CAN bus failure while maintaining basic lighting output and diagnostics.

How are the 64 output channels mapped on the board?

The board routes 32 outputs from each L99LDLH32 to separate connectors labeled "0-OUTx" and "1-OUTx". These are grouped into two 32-pin OLED generic connectors (J2), supporting dual-panel or redundant drive schemes. All outputs are high-side, compatible with common-cathode OLED architecture.

What diagnostic signals does the board expose?

The board exposes FAULT_0/FAULT_1 lines per device, SYNC_IO_0/SYNC_IO_1 for timing synchronization, NTC_0/NTC_1 inputs for thermal feedback, and test points for DIN, PWM, and CAN signals. The integrated 8-bit ADC allows full channel-by-channel status reporting via CAN FD Light or register reads.