Texas Instruments TMCS1123BEVM

Overview

TMCS1123BEVM from Texas Instruments is an evaluation module designed to assess the TMCS1123B-series isolated Hall-effect current-sense amplifiers with 0.33 × VS reference point (1.65 V at 5-V supply), supporting sensitivities of 25–150 mV/A, ±1100-V reinforced isolation, and operation from 3–5.5 V supply. It enables high-side and low-side current measurement configurations for industrial motor drives, solar inverters, and EV battery management systems.

For engineers reviewing the TMCS1123BEVM datasheet, TMCS1123BEVM pinout, TMCS1123BEVM application, or TMCS1123BEVM equivalent, this EVM supports rapid functional validation of all five TMCS1123B variants (B1–B5) via detachable PCB segments, on-board overcurrent set-point configuration, and test-point-accessible signal nodes including VOUT, VOC, and nOC.

Technical Context

The TMCS1123BEVM is a high-voltage evaluation platform built around the TMCS1123B family - isolated, voltage-output Hall-effect current sensors with fused lead-frame input paths, internal 1.65-V reference, and analog output scaling linearly with load current. Each segment hosts one TMCS1123B variant (e.g., B1 = 25 mV/A, B5 = 150 mV/A) in SOIC-10 package.

It provides configurable overcurrent detection via VOC pin using three methods: potentiometer-adjusted reference (R5), fixed resistor-divider (R6/R7 ≈ 0.9 × VS), or external drive. The board includes 90-A-rated lug connectors, bypass capacitors (C1_x/C3_x), optional output filter footprints (C2_x/R2_x), and test points for VOUT, GND, VS, and ALERT/OC signals.

Key Specifications

Availability

TMCS1123BEVM is available at Aetrix Electronics and suitable for industrial motor control, photovoltaic string monitoring, and EV on-board charger development requiring stable component supply and validated high-voltage evaluation infrastructure.

Supply support for TMCS1123BEVM 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 across industrial, automotive, and consumer markets.

The TMCS1123BEVM belongs to TI's High Voltage Evaluation Module (TI HV EVM) family, engineered specifically for safe, lab-based validation of isolated current sensing under real-world high-voltage conditions up to ±1100 VDC.

FAQ

What is the TMCS1123BEVM used for?

The TMCS1123BEVM is a dedicated evaluation module for the TMCS1123B-series isolated Hall-effect current-sense amplifiers. It enables functional testing of all five TMCS1123B variants (B1–B5) under high-side or low-side configurations, with user-configurable overcurrent detection, 90-A current handling capability, and direct access to critical analog signals including VOUT and VOC. The TMCS1123BEVM does not include populated ICs - users must solder TMCS1123B devices separately.

Does the TMCS1123BEVM come with TMCS1123B devices pre-installed?

No, the TMCS1123BEVM ships without any TMCS1123 devices populated. As stated in the official User's Guide (SBAU421B), users must order up to five TMCS1123B devices (e.g., TMCS1123B1 through TMCS1123B5) and manually solder them onto the corresponding segments of the TMCS1123BEVM before evaluation. This design allows flexibility in selecting gain and reference variants per test requirement.

What are the key safety requirements when using the TMCS1123BEVM?

The TMCS1123BEVM is classified as a Texas Instruments High Voltage Evaluation Module (TI HV EVM) and requires strict adherence to TI's HV safety guidelines: it must be used only by qualified professionals in controlled lab environments; all high-voltage connections must remain de-energized during setup; physical barriers and signage are mandatory where >50 Vrms/75 VDC is present; and personal protective equipment (e.g., insulated gloves, safety glasses) is required. The TMCS1123BEVM is not certified for production use.

How is overcurrent detection configured on the TMCS1123BEVM?

Overcurrent detection on the TMCS1123BEVM is implemented via the VOC pin of the TMCS1123B device and offers three configuration modes using jumper J1_x: (1) potentiometer-adjusted reference (R5_x, yielding 0.3–0.85 × VS), (2) fixed resistor-divider (R6_x/R7_x ≈ 0.9 × VS), or (3) external voltage drive via the VOC test point. The active-low nOC output asserts when VOUT exceeds VOC, enabling system-level fault signaling - a core function verified using the TMCS1123BEVM.

Can the TMCS1123BEVM evaluate both high-side and low-side current sensing?

Yes, the TMCS1123BEVM supports both high-side and low-side current sensing configurations. Its layout provides accessible IN+ and IN− terminals compatible with 90-A lug connectors, and its signal routing accommodates forward/reverse current flow in either topology. Section 4.1 of the TMCS1123xEVM User's Guide explicitly details separate setup procedures for low-side (Figure 4-1) and high-side measurements - confirming dual-mode validation capability for the TMCS1123BEVM.