STMicroelectronics EVAL-L99UDL01

Overview

EVAL-L99UDL01 from STMicroelectronics is an automotive evaluation board for the L99UDL01 6+2-channel programmable half-bridge driver IC, designed to validate central door lock actuation in 12 V vehicle systems. It supports six integrated 0.09 Ω half-bridges (configurable in parallel), two external MOSFET controllers, 4 MHz SPI control, 10-bit current feedback, and AEC-Q100-compliant diagnostics - enabling full functional verification of lock/unlock sequencing, fault detection, and thermal management under real-world battery voltage transients.

For engineers reviewing the EVAL-L99UDL01 datasheet, EVAL-L99UDL01 pinout, EVAL-L99UDL01 application, or EVAL-L99UDL01 equivalent, this board provides hardware-level access to all SPI registers, EN_OUT and DOUT control signals, charge pump monitoring points, and external gate drive nodes - essential for validating diagnostic coverage (open-load, short-to-battery, short-to-ground), PWM current regulation stability, and emergency override timing in ISO 16750-compliant environments.

Technical Context

The EVAL-L99UDL01 implements a complete test platform for the L99UDL01 IC, featuring direct connection to its TQFP64L package pins via solderable test points and header interfaces. It integrates decoupling capacitors for VDD (3.3 V/5 V), VS (battery rail), CP1/CP2 charge pump stages, and C3V3 internal regulator filtering - matching production layout requirements for EMI-sensitive automotive body electronics.

Board-level design includes configurable jumpers for EN_OUT assertion, CSN/SCK/SDI/SDO signal routing, and selectable pull-up/down on DOUT and diagnostic pins. All six integrated half-bridge outputs (OUT1–OUT6) and both external gate drive channels (GATEH1/GATEL1, GATEH2/GATEL2) are accessible via screw terminals or 0.1" headers, supporting real-time oscilloscope probing of PWM waveforms, VDS sensing, and current feedback signals.

Key Specifications

Availability

EVAL-L99UDL01 is available at Aetrix Electronics and suitable for automotive body control module development, OEM door lock system validation, and Tier-1 supplier ECU qualification requiring stable component supply, traceable firmware revision history, and documented diagnostic coverage per ISO 26262 ASIL-B readiness assessment.

Supply support for EVAL-L99UDL01 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 specializing in automotive-grade analog, power, and microcontroller solutions, with over 30 years of automotive qualification expertise and AEC-Q100-compliant manufacturing.

The EVAL-L99UDL01 belongs to ST's Automotive Power Drivers evaluation platform family, engineered specifically to accelerate functional safety validation and system-level integration of high-reliability door lock, seat, and mirror control ICs in 12 V/24 V vehicle architectures.

FAQ

Does EVAL-L99UDL01 include the L99UDL01 IC pre-mounted?

Yes. The EVAL-L99UDL01 board ships with a fully assembled and tested L99UDL01TR device in TQFP64L package, including all required decoupling capacitors, charge pump components, and protection circuitry. No additional IC mounting or soldering is required for immediate evaluation.

Can EVAL-L99UDL01 be used to validate reverse battery protection functionality?

Yes. The board provides dedicated pads and routing for an external N-channel MOSFET configured as reverse polarity protection, directly interfacing with CP_OUT and VS rails per the L99UDL01 datasheet implementation guidelines (Section 2.6.7). Test points allow measurement of gate drive timing and VDS clamping behavior during reverse-voltage stress.

What SPI clock frequency range is supported for register access during evaluation?

The EVAL-L99UDL01 supports the full 4 MHz SPI interface capability of the L99UDL01 IC. SCK signals up to 4 MHz are electrically validated on-board with controlled impedance traces and termination options; lower frequencies (e.g., 1 MHz) are recommended for initial register read/write debugging to ensure timing margin compliance.

Is thermal shutdown behavior observable and measurable on this evaluation board?

Yes. Thermal warning and shutdown events trigger the DOUT pin and set corresponding bits in SPI diagnostic registers (02h, 03h). The board includes thermal test points adjacent to the L99UDL01 exposed pad and heatsink area, enabling direct IR thermography or thermocouple correlation with register-reported thermal status and output disable timing.