STMicroelectronics EVAL6229QR

Overview

EVAL6229QR from STMicroelectronics is a compact 30×32 mm demonstration board built around the L6229Q three-phase BLDC motor driver IC in VFQFPN5x5 package, supporting up to 1.4 A RMS output current and 8–52 Vdc supply voltage for brushless DC motor control with Hall-effect sensor commutation.

For engineers reviewing the EVAL6229QR datasheet, EVAL6229QR pinout, EVAL6229QR application, or EVAL6229QR equivalent, this board serves as a validated reference platform for rapid evaluation of three-phase BLDC motor drive topologies, PWM current control, diagnostic feedback (DIAG), tachometer signal generation (TACHO), and direction/brake logic interfacing in embedded motion control systems.

Technical Context

The EVAL6229QR implements a complete three-phase BLDC motor drive solution using the L6229Q's integrated half-bridge power stage, Hall sensor decoding logic, and analog current regulation via VREF. It supports closed-loop speed control through the TACHO frequency-to-voltage output and enables real-time fault response via the open-drain DIAG pin tied to EN for automatic shutdown on overcurrent or overtemperature events.

Board-level design includes charge-pump circuitry (D1, C3, C4) for high-side gate drive, RC networks (R4/C5, R8/C6, R9/C7) setting protection timing (t_DISABLE ≈ 200 µs), PWM off-time (t_OFF ≈ 50 µs), and tachometer pulse width (t_PULSE ≈ adjustable), all optimized for stable operation across -25°C to +125°C ambient.

Key Specifications

Availability

EVAL6229QR is available at Aetrix Electronics and suitable for BLDC motor control prototyping, industrial fan/pump commissioning, and embedded motion system validation requiring stable component supply and documented reference design fidelity.

Supply support for EVAL6229QR 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, specializing in power management, motor control, and microcontrollers for industrial, automotive, and consumer applications.

The EVAL6229QR belongs to ST's motor control evaluation board family, designed specifically to accelerate development of three-phase BLDC drives using Hall-sensor-based commutation and integrated diagnostics.

FAQ

What motor types is EVAL6229QR designed to drive?

EVAL6229QR is configured exclusively for three-phase brushless DC (BLDC) motors with Hall-effect position sensing. It supports motors rated up to 1.4 A RMS phase current and 52 Vdc bus voltage, commonly used in cooling fans, small pumps, and precision positioning actuators. The board does not support stepper, brushed DC, or sensorless BLDC configurations.

How is overcurrent protection implemented on this board?

Overcurrent protection uses the L6229Q's internal sense-FET architecture with external RC network R4/C5 to set disable time (~200 µs) and delay time (~1 µs). When triggered, the DIAG pin pulls low and-since it's wired to EN-forces immediate shutdown of all half-bridge MOSFETs, providing hardware-level fault containment without software intervention.

Can the TACHO output be used directly for speed feedback control?

Yes. The TACHO pin delivers fixed-width pulses synchronized to H1 input transitions, enabling straightforward frequency-to-voltage conversion using an external RC integrator (e.g., R9/C7). This analog speed signal can feed directly into a microcontroller ADC or op-amp comparator for closed-loop speed regulation without additional timing ICs.

Is external VDD required for Hall sensor biasing?

Yes. The board provides a dedicated VDD pin (3.3–5 V) to supply pull-up voltage for the H1–H3 Hall sensor inputs. This rail must be externally sourced-typically from the host MCU's I/O supply-and is independent of VS. No onboard regulator generates VDD; omission will prevent Hall signal detection and stall motor commutation.