Monolithic Power Systems Inc. TBMA730-Q-LT-01A

Overview

TBMA730-Q-LT-01A from Monolithic Power Systems is a long-format (LT) evaluation board designed specifically for the MA730 MagAlpha magnetic position sensor. It supports both side-shaft and end-of-shaft mounting configurations, features dual 8-pin 2.54 mm headers (CN1/CN2), includes pre-mounted MA730 sensor and decoupling capacitors (1 µF ×2, 100 nF optional), and enables rapid functional validation of angle sensing, incremental encoder outputs (A/B/Z), and PWM in servo drives and BLDC motor commutation.

For engineers reviewing the TBMA730-Q-LT-01A datasheet, TBMA730-Q-LT-01A pinout, TBMA730-Q-LT-01A application, or TBMA730-Q-LT-01A equivalent, this board provides direct hardware access to MA730 serial interface (CS/SCLK/MISO/MOSI), test signals (TEST), flash supply (VFLASH), and configurable I/Os including U/V/W motor commutation outputs and A/B/Z incremental encoder channels - all critical for validating magnetic position feedback in real-time control systems.

Technical Context

This board implements Type 1 LT layout per the TBMA User Guide Rev. 1.2, with fixed 3.3 V VDD supply, dedicated VFLASH rail for firmware updates, and dual 8-pin connectors enabling SPI communication and parallel output routing. The MA730 sensor is pre-soldered and electrically isolated via 0402 ceramic decoupling (1 µF ×2, 100 nF optional).

Pin mapping follows Table 3: CN1 carries power (VDD/GND/VFLASH), SPI (CS/SCLK/MISO/MOSI), and NC; CN2 delivers functional outputs - U/V/W for motor commutation and A/B/Z for incremental encoding - all directly sourced from MA730's configurable GPIOs without level-shifting or buffering.

Key Specifications

Availability

TBMA730-Q-LT-01A is available at Aetrix Electronics and suitable for servo drives, robotics, automotive EPS, and BLDC motor commutation requiring stable component supply, quick-turn evaluation, and repeatable magnetic position sensor validation.

Supply support for TBMA730-Q-LT-01A 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management and sensing solutions, with design centers across Asia and North America.

TBMA730-Q-LT-01A belongs to the TBMA test board product line, engineered to accelerate development of magnetic position sensing applications by providing plug-and-play hardware for MagAlpha sensors - eliminating custom PCB spin time for prototyping and system-level validation.

FAQ

Does TBMA730-Q-LT-01A include populated connectors?

No. CN1 and CN2 are unpopulated 2.54 mm 8-position receptacle footprints (Wurth 690367280876 or TE Connectivity 7-2178711-8 compatible). Users must solder their own headers or cables to interface with host controllers or evaluation kits.

What is the role of the VFLASH pin on CN1.3?

VFLASH supplies 3.9 V exclusively during firmware flashing operations. It remains unpowered during normal operation to prevent unintended memory writes - ensuring robustness in field-deployed test setups where accidental reprogramming must be avoided.

Can TBMA730-Q-LT-01A be used with other MagAlpha sensors?

No. This board is configured for MA730 only (Type 1 layout). Other MAxxx variants require specific board types - e.g., MA734 uses Type 5, MA735 uses Type 6 - due to differing pinouts, power domains, and output configurations as defined in the TBMA User Guide.

Is the MA730 sensor pre-calibrated on this board?

Yes. The MA730 is factory-programmed with default calibration parameters and ready for immediate use. No user calibration is required to obtain accurate angle data - though advanced users may reprogram settings via SPI using the VFLASH rail.

What mechanical mounting options does TBMA730-Q-LT-01A support?

It supports both side-shaft and end-of-shaft configurations per the User Guide. The LT (long) form factor positions the MA730 at the board edge, allowing direct coupling to rotating shafts with diametrically magnetized magnets - validated for use with MPS MAG10 ring and cylinder geometries.

Are decoupling capacitors soldered to the board?

Yes. C1 and C4 (1 µF X6S 0402) are populated; C3 (100 nF X7R 0402) is optional and left unpopulated by default - users may add it if higher-frequency noise immunity is needed in high-dv/dt motor drive environments.

Which evaluation kits is TBMA730-Q-LT-01A compatible with?

It is explicitly compatible with EVKT-MagAlpha-MagDiff and EVKT-MACOM per the User Guide. Both kits provide matching pinouts and signal routing for seamless connection - no adapter boards or wiring modifications are required for basic SPI communication and output monitoring.