STMicroelectronics EVAL6225PD

Overview

EVAL6225PD from STMicroelectronics is an evaluation board for the L6225PD dual full-bridge DMOS motor driver IC, designed to drive bipolar stepper motors or dual/quad DC motors in industrial motion control systems. It supports 8–52 V supply voltage, delivers up to 2.8 A peak output current per bridge, features non-dissipative overcurrent protection and integrated fast freewheeling diodes, and operates up to 100 kHz switching frequency.

For engineers reviewing the EVAL6225PD datasheet, EVAL6225PD pinout, EVAL6225PD application, or EVAL6225PD equivalent, this board enables rapid validation of L6225PD-based motor control designs-including dead-time management, bootstrap gate drive implementation, parallel bridge configuration, and thermal shutdown response-under real-world load and layout conditions.

Technical Context

The EVAL6225PD implements the L6225PD IC in PowerSO20 package with exposed thermal slug, configured as a complete dual H-bridge test platform. It includes all external charge pump components (CBOOT = 220 nF, CP = 10 nF, RP = 100 Ω, D1/D2 = 1N4148), ENA/ENB RC networks (REN = 100 kΩ, CEN = 5.6 nF), and decoupling (C1 = 100 µF, C2 = 100 nF) per ST's recommended layout.

It supports both independent and paralleled bridge operation modes, provides access to all critical signals (VSA/VSB, OUT1A/OUT2A/OUT1B/OUT2B, SENSEA/SENSEB, VCP/VBOOT, ENA/ENB, IN1A/IN2A/IN1B/IN2B), and facilitates measurement of RDS(ON) matching, OCD timing (tOCD(ON)/tOCD(OFF)), thermal impedance (Rth-j-amb ≈ 36 °C/W with top-side copper), and PWM current regulation behavior.

Key Specifications

Availability

EVAL6225PD is available at Aetrix Electronics and suitable for industrial motor control prototyping, stepper actuator validation, and dual DC motor driver qualification requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for EVAL6225PD 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 power management, motor control, and industrial analog solutions, with broad portfolio coverage from discrete devices to system-level ICs.

The EVAL6225PD belongs to ST's Motor Control Evaluation Kit family, engineered to accelerate development of robust, thermally efficient, and noise-immune dual H-bridge motor drivers for factory automation, robotics, and precision positioning systems.

FAQ

What motor types can be evaluated using the EVAL6225PD?

The EVAL6225PD is configured to evaluate bipolar stepper motors (full-step/half-step/microstep) and dual independent DC motors. Its L6225PD IC supports bidirectional current control per bridge, enabling precise torque and position control in open-loop stepper applications and variable-speed reversible DC motor drives.

Does the EVAL6225PD support paralleled bridge operation?

Yes - the board provides accessible OUT1A/OUT2A/OUT1B/OUT2B pins and separate SENSEA/SENSEB connections, allowing users to implement ST-recommended parallel configurations: Bridge A half-bridges paralleled with Bridge B half-bridges (5.6 A OCD threshold) or intra-bridge paralleling (2.8 A OCD threshold), with matching RDS(ON) confirmed on-die.

How is thermal performance validated on the EVAL6225PD?

Thermal performance is validated using the PowerSO20 package's exposed thermal slug soldered to a 6 cm² top-side copper area with ground layer. Measured Rth-j-amb ≈ 36 °C/W aligns with ST's Figure 20 data, enabling safe 1.4 A RMS continuous operation at 125 °C junction temperature under 24 V, 30 kHz PWM conditions.

Can the EVAL6225PD be used for closed-loop current control?

Yes - the board exposes SENSEA and SENSEB pins connected directly to internal high-side current sensing elements. These provide proportional current feedback (non-dissipative, ~1/1000 scaling) compatible with external op-amp or ADC-based current loop controllers, supporting accurate real-time phase current regulation without shunt resistor losses.