STMicroelectronics EVAL-L99H02XP

Overview

EVAL-L99H02XP from STMicroelectronics is an evaluation board for the L99H02XP automotive dual H-bridge motor driver IC, enabling rapid prototyping of 12 V/24 V DC motor control systems with reverse battery protection, programmable freewheeling, and real-time diagnostics. It integrates a preassembled L99H02XP daughterboard and an STM8A-based motherboard featuring SPI interface, current sensing, thermal monitoring, and GUI-controlled register configuration.

For engineers reviewing the EVAL-L99H02XP datasheet, EVAL-L99H02XP pinout, EVAL-L99H02XP application, or EVAL-L99H02XP equivalent, this board supports functional validation of high-side/low-side gate drive timing, PWM-controlled motor direction/speed, external MOSFET thermal sensing, and SPI-configurable protection thresholds in automotive body electronics.

Technical Context

The board implements a two-stage central charge pump (100% duty cycle) to sustain full R_DS(on) operation down to 6 V supply, enabling robust gate drive for normal-level N-channel MOSFETs in low-battery conditions. It supports PWM switching up to 30 kHz and includes dedicated circuitry for controlling reverse battery protection MOSFETs.

Real-time diagnostics are enabled via integrated current sense amplifiers (freely configurable gain/offset), zero-adjust trimming for end-of-line calibration, and embedded thermal sensors on external power MOSFETs. The STM8A microcontroller provides SPI communication, motor evolution tracking, free-wheeling state reporting, and board temperature monitoring through a dedicated GUI.

Key Specifications

Availability

EVAL-L99H02XP is available at Aetrix Electronics and suitable for automotive body control modules, HVAC blower systems, and power seat actuator development requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for EVAL-L99H02XP 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, designing and manufacturing analog, microcontroller, power, and automotive-grade ICs with ISO/TS 16949-certified processes.

EVAL-L99H02XP belongs to ST's automotive motor control evaluation platform family, engineered specifically to accelerate validation of high-reliability DC motor drivers in safety-critical vehicle subsystems.

FAQ

What software tools are required to operate EVAL-L99H02XP?

The board requires ST's dedicated GUI software, distributed with the EVAL-L99H02XP package, which runs on Windows and communicates via USB-to-SPI bridge. No third-party IDE or compiler is needed - all register configuration, real-time motor status visualization (e.g., free-wheeling mode, temperature, current), and diagnostic logging are handled within the GUI.

Can EVAL-L99H02XP drive brushed DC motors directly?

No - the board hosts the L99H02XP driver IC but does not include final power MOSFETs on the daughterboard. External high-side and low-side N-channel MOSFETs must be mounted (e.g., STB270N04) and thermally coupled to the embedded sensors. The board provides gate drive outputs, current sense inputs, and thermal feedback paths for full system integration.

Does EVAL-L99H02XP support CAN or LIN communication?

Yes - the STM8A motherboard includes hardware-level CAN_TX/CAN_RX (Pin PG0/PG1) and LINUART_TX/LINUART_RX (Pin PD5/PD6) interfaces, allowing integration into vehicle networks. These signals are routed to headers J102 (CAN) and J101 (LIN), with pull-up resistors and ESD protection implemented per automotive standards.

Is reverse battery protection implemented on the evaluation board?

Yes - the L99H02XP daughterboard includes discrete reverse battery protection circuitry controlled by the IC, using an external P-channel MOSFET (Q1 BC847-driven) and associated gate drive logic. This protects both the daughterboard and connected peripherals when V_BAT polarity is inverted.