Monolithic Power Systems Inc. EVCS1823-Q-510BRN-00A

Overview

EVCS1823-Q-510BRN-00A from Monolithic Power Systems is an evaluation board for the MCS1823GQTE series linear Hall-effect current sensor IC, designed for bidirectional ±10 A DC/AC current sensing with integrated over-current detection (OCD) at ±10 A trigger point, 5 V supply, and 200 mV/A typical sensitivity. It enables galvanically isolated current measurement in motor drives, power supplies, and battery management systems.

For engineers reviewing the EVCS1823-Q-510BRN-00A datasheet, EVCS1823-Q-510BRN-00A pinout, EVCS1823-Q-510BRN-00A application, or EVCS1823-Q-510BRN-00A equivalent, this board provides validated test conditions, OCD response characterization, and direct interface to the MCS1823GQTE-510BRN sensor IC in its native TQFN-12 package.

Technical Context

The EVCS1823-Q-510BRN-00A implements a differential Hall array to reject stray magnetic fields and supports 5 V single-supply operation with ratiometric or absolute output modes. Its primary conductor path is internally isolated from sensor logic pins, enabling high-voltage system integration without external isolation components.

It interfaces directly with the MCS1823GQTE-510BRN IC, which delivers 200 mV/A sensitivity, <2.5% total accuracy across 10–100% of ±10 A range, and /OCD output with <10% error at ±10 A trigger threshold-verified under TA = 25°C, VCC = 5 V conditions.

Key Specifications

Availability

EVCS1823-Q-510BRN-00A is available at Aetrix Electronics and suitable for motor control validation, industrial power supply monitoring, and battery protection circuit development requiring stable component supply and pre-characterized sensor interface behavior.

Supply support for EVCS1823-Q-510BRN-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 series was developed to replace optocoupler-based isolation in current-sensing applications, delivering ultra-small TQFN-12 packaging, differential Hall architecture, and integrated OCD for compact, high-reliability power systems.

FAQ

What is the function of the /OCD pin on EVCS1823-Q-510BRN-00A?

The /OCD pin is an open-drain digital output that asserts low when primary current exceeds ±10 A. It features hysteresis for noise immunity and is pulled up externally via R1 (10 kΩ). This signal enables immediate fault shutdown in inverters or battery protection ICs without software polling.

Can EVCS1823-Q-510BRN-00A operate with 3.3 V supply?

No - this specific variant is configured for 5 V operation only. The "5" in "510BRN" denotes 5 V VCC support, while "310BRN" variants are designated for 3.3 V. Using 3.3 V would result in incorrect VOUT offset (2.5 V expected) and potential /OCD mis-triggering.

How is galvanic isolation achieved on this evaluation board?

Isolation is inherent to the MCS1823GQTE-510BRN IC, not the PCB. The sensor die uses internal insulation between the primary conductor (IP+/IP−) and secondary side (VCC, GND, VOUT, /OCD), rated to 2100 VDC per IEC 60747-17. The board routes these domains with creepage/clearance compliance but does not add external isolation.

What is the role of C2 (NC) on the schematic?

C2 is a no-connect (NC) footprint reserved for optional filtering of the /OCD signal. It is left unpopulated by default. If added, a ceramic capacitor (e.g., 100 pF) may reduce high-frequency noise on the /OCD line in EMI-heavy environments, but it is not required for baseline functionality.

Does this board support unidirectional current measurement?

No - EVCS1823-Q-510BRN-00A is configured for bidirectional ±10 A sensing. The MCS1823GQTE-510BRN IC supports both modes, but this board's calibration, VOUT offset (2.5 V), and OCD threshold symmetry confirm bidirectional design. Unidirectional variants use different part numbers (e.g., suffix "URN").