Monolithic Power Systems Inc. EVCS1803-S-50-00A

Overview

EVCS1803-S-50-00A from Monolithic Power Systems is a linear Hall-effect current sensor evaluation board designed to demonstrate the MCS180XGS-50 current sensor IC, supporting ±50 A primary current sensing at 5 V supply, with 40 mV/A typical sensitivity, galvanic isolation, and 100 kHz bandwidth for high-fidelity AC/DC current measurement in power electronics.

For engineers reviewing the EVCS1803-S-50-00A datasheet, EVCS1803-S-50-00A pinout, EVCS1803-S-50-00A application, or EVCS1803-S-50-00A equivalent, this board enables rapid validation of MCS180XGS-50 performance under real-world load conditions including motor control feedback loops, SMPS over-current protection, and isolated current monitoring in industrial inverters.

Technical Context

The EVCS1803-S-50-00A implements a differential Hall array architecture that rejects external magnetic interference while measuring bidirectional current through an integrated 0.9 mΩ primary conductor. It interfaces directly with the MCS180XGS-50 SOIC-8 sensor IC, which outputs a ratiometric analog voltage (VOUT = 2.5 V ± 2.0 V) proportional to applied current.

Board-level design includes configurable filtering via C4 (unpopulated footprint), enabling bandwidth adjustment from DC to 100 kHz; VCC decoupling uses 0603 and 0805 ceramic capacitors; and screw terminals (IP+/IP−) support secure high-current connections up to ±50 A.

Key Specifications

Availability

EVCS1803-S-50-00A is available at Aetrix Electronics and suitable for motor control development, switch-mode power supply validation, and industrial over-current protection systems requiring stable component supply and traceable evaluation hardware.

Supply support for EVCS1803-S-50-00A 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 ICs, with expertise in DC/DC converters, LED drivers, and precision analog sensors.

The MCS180X product line delivers isolated, high-bandwidth current sensing for demanding power conversion applications, targeting accuracy-critical roles in motor drives, renewable energy inverters, and automotive-grade power systems.

FAQ

What current ranges does the EVCS1803-S-50-00A support?

This board is optimized for ±50 A primary current sensing using the MCS180XGS-50 IC, delivering 40 mV/A typical sensitivity at 5 V supply. It is not configurable for other ranges; alternate versions (e.g., EVCS1803-S-20-00A) are required for different full-scale currents.

How is galvanic isolation achieved on this evaluation board?

Isolation is inherent to the MCS180XGS-50 IC itself - its SOIC-8 package integrates a magnetically coupled, non-contact sensing path where the primary conductor (IP+/IP− pins) is physically and electrically separated from the low-voltage signal pins (VCC, GND, VOUT, FILT), achieving reinforced isolation without external components.

Can the bandwidth be adjusted, and how?

Yes. Bandwidth is set by capacitor C4 (unpopulated 0603 footprint). Increasing C4 capacitance reduces bandwidth per the sensor's internal filter pole; the default open-C4 configuration supports the full 100 kHz bandwidth specified for MCS180XGS-50.

What power supply requirements must be met for proper operation?

A clean, regulated 5 V DC supply capable of ≥100 mA is required. The board uses 0.1 µF and 4.7 µF ceramic decoupling capacitors (C1, C2) to suppress noise; reverse polarity or overvoltage will damage the MCS180XGS-50 IC.

Does this board include calibration or trimming components?

No. The EVCS1803-S-50-00A provides direct access to the raw analog output of the MCS180XGS-50 IC. System-level calibration (e.g., offset/gain correction) must be performed externally in the host controller or data acquisition system.

What is the role of the FILT pin on the board?

The FILT pin connects to the internal filter node of the MCS180XGS-50 IC and is brought out to a test point. It is not intended for user connection; leaving it unconnected maintains factory-tuned response. External filtering should be applied to VOUT instead.

Are screw terminals included with the board?

Yes - two 4-pin Keystone Electronics 8191K-ND screw terminals are soldered to the board for secure IP+/IP− connections, rated for wire gauges up to 12 AWG and continuous ±50 A current flow under thermal derating guidelines.