Monolithic Power Systems Inc. EVCS1823-Q-330BRN-00A

Overview

EVCS1823-Q-330BRN-00A from Monolithic Power Systems is an evaluation board for the MCS1823GQTE series linear Hall-effect current sensor IC, designed to demonstrate bidirectional ±30 A current sensing with 44 mV/A typical sensitivity and integrated over-current detection (OCD) at ±30 A, operating from a 3.3 V supply. It features galvanic isolation between primary conductor (IP+/IP−) and signal pins (VOUT, /OCD), enabling replacement of optoisolators in motor control and power supply monitoring.

For engineers reviewing the EVCS1823-Q-330BRN-00A datasheet, EVCS1823-Q-330BRN-00A pinout, EVCS1823-Q-330BRN-00A application, or EVCS1823-Q-330BRN-00A equivalent, this board provides validated test conditions for VOUT linearity, OCD response timing, and thermal stability across its rated current range under real-world PCB layout constraints.

Technical Context

The EVCS1823-Q-330BRN-00A implements a differential Hall array on the MCS1823GQTE-ABBCDEFF IC to reject stray magnetic fields, supporting accurate DC/AC current measurement. Its isolated primary path handles up to ±30 A continuous current, while the 3.3 V supply powers analog output (VOUT) and open-drain /OCD logic with 10% OCD error tolerance.

VOUT delivers a ratiometric output: 0.5 × VCC + Sens × IP = 1.65 V ± 1.32 V full-scale swing (±30 A × 44 mV/A), referenced to GND. The /OCD pin asserts low when primary current exceeds ±30 A, with hysteresis confirmed via oscilloscope waveforms in the reference design.

Key Specifications

Availability

EVCS1823-Q-330BRN-00A is available at Aetrix Electronics and suitable for motor drive validation, industrial power supply monitoring, and battery management system prototyping requiring stable component supply and repeatable current-sensing characterization.

Supply support for EVCS1823-Q-330BRN-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 MCS1823 product line targets isolated current sensing in space-constrained applications such as server PSUs, EV onboard chargers, and servo drives-leveraging ultra-small TQFN-12 packaging and differential Hall architecture for noise immunity.

FAQ

What is the function of the /OCD pin on the EVCS1823-Q-330BRN-00A?

The /OCD pin is an open-drain output that pulls low when primary current exceeds ±30 A, providing immediate hardware-level fault signaling without software polling. It includes built-in hysteresis to prevent chatter during transient overloads and interfaces directly with microcontroller GPIO or dedicated fault controllers.

Can the EVCS1823-Q-330BRN-00A operate from a 5 V supply?

No-the EVCS1823-Q-330BRN-00A variant is configured for 3.3 V operation only, as indicated by the "3" prefix in its part number and confirmed by its optimized sensitivity (44 mV/A) and OCD threshold (±30 A) specified at 3.3 V. Using 5 V may damage the onboard MCS1823GQTE IC or invalidate calibration.

How is galvanic isolation achieved on this evaluation board?

Isolation is inherent to the MCS1823GQTE-ABBCDEFF IC itself: the primary conductor (IP+/IP−) forms a separate copper path physically separated from the signal-side pins (VCC, GND, VOUT, /OCD) by internal molding compound and package dielectric. No external transformers or optocouplers are required.

What does the "BRN" suffix indicate in EVCS1823-Q-330BRN-00A?

The "BRN" suffix denotes the board's configuration for bidirectional current sensing with ratiometric output mode, where VOUT centers at 0.5 × VCC (1.65 V) and scales linearly with input current polarity and magnitude-distinct from unidirectional or absolute-output variants.

Is the primary conductor on the EVCS1823-Q-330BRN-00A soldered or accessible for external connections?

The primary conductor is implemented as a dedicated high-current copper trace on the PCB, terminating at labeled IP+ and IP− pads. These pads accept wire leads or busbar connections, enabling direct insertion into live current paths without breaking the conductor-no soldering to the trace itself is required or recommended.