Monolithic Power Systems Inc. EVCS1806-S-3-30-00A

Overview

EVCS1806-S-3-30-00A from Monolithic Power Systems is a 2-layer evaluation board for the MCS1806GS-3-30 current sensor, featuring 3kVRMS galvanic isolation, ±30A primary current range, 44mV/A typical sensitivity, and 3.3V supply operation. It enables rapid validation of isolated AC/DC current sensing in power converters and motor drives.

For engineers reviewing the EVCS1806-S-3-30-00A datasheet, EVCS1806-S-3-30-00A pinout, EVCS1806-S-3-30-00A application, or EVCS1806-S-3-30-00A equivalent, this board provides verified test conditions (TA = 25°C, C4 open), direct VOUT measurement interface, and screw-terminal primary current injection-critical for prototyping isolated current feedback loops.

Technical Context

The board implements the MCS1806GS-3-30 IC in SOIC-8 package with differential Hall array architecture that rejects stray magnetic fields. Primary conductors (IP+, IP−) are physically separated from low-voltage sensor pins (VCC, GND, VOUT, FILT) to maintain 3kVRMS isolation per UL 62368-1.

It supports fixed 3.3V supply and delivers ratiometric output: VOUT = 0.5 × VCC + (44mV/A × IP), with total accuracy <±2.5% across ±3A to ±30A. Bandwidth is adjustable via external capacitor C4 on FILT pin.

Key Specifications

Availability

EVCS1806-S-3-30-00A is available at Aetrix Electronics and suitable for power converter design validation, motor phase current monitoring, and industrial DC bus protection requiring stable component supply and repeatable test conditions.

Supply support for EVCS1806-S-3-30-00A 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, including DC/DC converters, LED drivers, and precision analog sensors.

This evaluation board belongs to MPS's isolated current sensor product line, designed specifically to accelerate adoption of Hall-effect-based alternatives to optocouplers and shunt+amplifier solutions in safety-critical power systems.

FAQ

What is the purpose of the FILT pin on the EVCS1806-S-3-30-00A?

The FILT pin connects to an external capacitor (C4) that sets the sensor's bandwidth. Adding capacitance reduces output voltage ripple noise but slows transient response-typical values range from 1nF to 100nF depending on application noise requirements and current slew rate.

Can the EVCS1806-S-3-30-00A operate with a 5V supply?

No. This specific variant (suffix -S-3-30-) is configured for 3.3V operation only. The MCS1806GS-3-30 IC is internally trimmed for 3.3V VCC; using 5V may exceed absolute maximum ratings and invalidate accuracy specifications.

How is primary current injected into the board?

Via two 4-pin screw terminals labeled IP+ and IP−, which connect directly to the primary conductor path inside the MCS1806GS-3-30 SOIC-8 package. These terminals carry up to ±30A and are physically isolated from all low-voltage signal pins.

What does the "30" in EVCS1806-S-3-30-00A signify?

The "30" denotes the rated primary current range of ±30A. It corresponds to the MCS1806GS-3-30 sensor variant, which has 44mV/A typical sensitivity and is factory calibrated for that full-scale range under 3.3V supply.

Is the board RoHS-compliant and halogen-free?

Yes. Per MPS documentation and bill-of-materials, all components-including Murata capacitors (GRM188R71C104KA01D, GCM21BR71C475KA73L) and Keystone screw terminals-are RoHS 2015/863 compliant and halogen-free, meeting IPC-1752A material declaration standards.

Does the board include calibration data or trim resistors?

No. The EVCS1806-S-3-30-00A is a functional evaluation platform-not a calibrated metrology instrument. Accuracy relies entirely on the factory-trimmed MCS1806GS-3-30 IC (±2.5% total error); no onboard trims, EEPROM, or user-adjustable gain/offset components are present.