Texas Instruments TMCS1126BEVM

Overview

TMCS1126BEVM from Texas Instruments is a high-voltage evaluation module designed to characterize the TMCS1126B-series isolated Hall-effect current-sense amplifiers with 1.65-V zero-input reference point. It supports all five sensitivity variants (25–150 mV/A), features reinforced isolation up to ±1100 VDC, and enables safe high-current testing up to 90 A DC using large lug connectors and breakable PCB segments.

For engineers reviewing the TMCS1126BEVM datasheet, TMCS1126BEVM pinout, TMCS1126BEVM application, or TMCS1126BEVM equivalent, this EVM provides rapid functional validation of isolated current sensing in industrial motor drives, energy storage systems, and EV on-board chargers - with test points, overcurrent monitoring circuitry, and configurable VOC reference options.

Technical Context

The TMCS1126BEVM implements a modular, snap-apart PCB layout hosting five discrete TMCS1126B device variants (B1–B5) - each populated with a specific sensitivity (25/50/75/100/150 mV/A) and sharing the same 1.65-V (0.33×VS) quiescent output reference. Each segment includes dedicated IN+/IN− high-current terminals, VOUT test points, and configurable overcurrent detection via J1 header options.

It integrates bypass capacitors (0.1-μF ceramic), optional output filter footprints (10 pF + 0 Ω), and an active-low nOC comparator circuit driven by either a potentiometer-adjustable (R4) or resistor-divider (R5/R6) VOC reference - enabling precise threshold setting across the full 3–5.5-V supply range without external components.

Key Specifications

Availability

TMCS1126BEVM is available at Aetrix Electronics and suitable for industrial motor control, battery management systems, and EV charging infrastructure requiring stable component supply, high-voltage safety validation, and rapid sensitivity selection across isolated current-sense amplifier variants.

Supply support for TMCS1126BEVM 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and power applications.

The TMCS1126BEVM belongs to TI's high-voltage evaluation module (HV EVM) family, engineered specifically to accelerate development of reinforced-isolation current sensing in safety-critical power conversion and energy systems.

FAQ

What is the primary function of the TMCS1126BEVM?

The TMCS1126BEVM is a dedicated evaluation module for the TMCS1126B-series isolated Hall-effect current-sense amplifiers. It enables functional characterization of all five sensitivity variants (25–150 mV/A) with a fixed 1.65-V output reference point, supporting high-current (up to 90 A DC), high-voltage (±1100 VDC) testing under lab conditions while maintaining reinforced isolation integrity.

Which TMCS1126 devices are compatible with the TMCS1126BEVM?

The TMCS1126BEVM is configured exclusively for TMCS1126B-series devices: TMCS1126B1QDVGR through TMCS1126B5QDVGR. These share the 0.33×VS (1.65 V at 5-V supply) quiescent output reference and are mounted on five breakable PCB segments - one per sensitivity value - as confirmed in Table 3-2 of the SBAU422 user's guide.

Does the TMCS1126BEVM include overcurrent detection capability?

Yes. The TMCS1126BEVM implements an on-board overcurrent detection circuit using the TMCS1126B's active-low nOC pin. VOC reference is configurable via J1 header: potentiometer-adjustable (0.3–0.85×VS), fixed resistor-divider (~0.9×VS), or externally driven. R1_x serves as the pull-up resistor for the nOC signal, enabling direct system-level fault signaling.

Can the TMCS1126BEVM be used for electromagnetic compatibility (EMC) testing?

No. The TMCS1126BEVM is explicitly not laid out for electromagnetic compatibility (EMC) or electromagnetic interference (EMI) testing, as stated in Section 1.4 of the SBAU422 user's guide. Its layout prioritizes functional evaluation, thermal dissipation, and mechanical flexibility - not controlled impedance, shielding, or EMC compliance.

What safety precautions apply when operating the TMCS1126BEVM?

TI mandates strict adherence to HV EVM safety guidelines: de-energize before probing, use qualified observers during energized operation, install emergency power-off (EPO) protection for >50 Vrms circuits, wear PPE (e.g., insulated gloves), and never touch HV terminals. The board carries "DANGER HIGH VOLTAGE" and "CAUTION HOT SURFACE" warnings - consistent with TI's HV EVM safety policy in Section 1.5.