Monolithic Power Systems Inc. EVCS1806-S-5-30-00A

Overview

EVCS1806-S-5-30-00A from Monolithic Power Systems is a 2-layer evaluation board for the MCS1806GS-5-30 Hall-effect current sensor, supporting ±30 A primary current sensing at 5 V supply, delivering 66 mV/A typical sensitivity with <2.5% total accuracy and 3 kVRMS galvanic isolation-used to validate isolated current measurement in motor drives and power converters.

For engineers reviewing the EVCS1806-S-5-30-00A datasheet, EVCS1806-S-5-30-00A pinout, EVCS1806-S-5-30-00A application, or EVCS1806-S-5-30-00A equivalent, this board enables rapid functional validation of the MCS1806GS-5-30 sensor's linearity, bandwidth control via C4, and noise performance under DC/AC load conditions.

Technical Context

The board implements the MCS1806GS-5-30 IC in SOIC-8 package with differential Hall array architecture that rejects stray magnetic fields, enabling stable operation in electrically noisy environments such as inverters and UPS systems.

It provides isolated analog output (VOUT) referenced to VCC/2 (2.5 V offset at 5 V), supports ±30 A primary current range, and uses external screw terminals (IP+, IP−) and header pins (VCC, GND, VOUT, FILT) for flexible test setup and bandwidth tuning via capacitor C4.

Key Specifications

Availability

EVCS1806-S-5-30-00A is available at Aetrix Electronics and suitable for motor control validation, industrial power supply monitoring, and renewable energy inverter commissioning requiring stable component supply and fast-turn evaluation support.

Supply support for EVCS1806-S-5-30-00A 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.

The MCS1806GS series targets isolated current sensing in space-constrained, high-reliability applications such as server PSUs, EV on-board chargers, and servo drives-designed to replace optocoupler-based solutions with higher accuracy and thermal stability.

FAQ

What is the purpose of the FILT pin on the EVCS1806-S-5-30-00A?

The FILT pin connects to capacitor C4 to configure the sensor's signal bandwidth. A larger C4 value lowers bandwidth and suppresses high-frequency noise; the default open configuration allows maximum bandwidth per the MCS1806GS-5-30 specification. This pin is not internally connected to any active circuitry without external capacitance.

Can the EVCS1806-S-5-30-00A be used with a 3.3 V supply?

No-this specific variant is configured for 5 V operation only. The "-5-" in the part number denotes 5 V VCC, and its internal reference and sensitivity (66 mV/A) are calibrated for 5 V. Using 3.3 V would shift the VOUT mid-point to 1.65 V and invalidate accuracy; use EVCS1806-S-3-30-00A instead.

How is primary current applied to the board?

Primary current flows through screw terminals labeled IP+ and IP−, which connect directly to the integrated current conductor inside the MCS1806GS-5-30 IC. These terminals are isolated from the low-voltage sensor side by 3 kVRMS barrier and require no soldering-enabling safe, tool-free connection of up to ±30 A DC or AC waveforms.

Does the board include the current sensor IC?

Yes-the EVCS1806-S-5-30-00A includes one pre-mounted MCS1806GS-5-30 IC in SOIC-8 package (U1), along with decoupling capacitors (C1, C2), NC placeholders (C3, C4), and Keystone 8191K screw terminals for IP+/IP−. No assembly is required to begin testing.

What is the role of the 0.1 µF capacitor (C1) on the board?

C1 is a 0.1 µF ceramic capacitor placed at the VCC input to suppress high-frequency supply noise and stabilize the sensor's internal regulator. It is mounted in 0603 package per Murata GRM188R71C104KA01D and must remain installed for specified accuracy and EMI performance.

Is the board RoHS compliant and lead-free?

Yes-EVCS1806-S-5-30-00A conforms to RoHS Directive 2011/65/EU and uses lead-free PCB finish and components. All listed BOM items-including Murata capacitors and MPS IC-carry RoHS-compliant manufacturer part numbers and have been verified per MPS documentation Rev. 1.0 (Dec 2022).