Monolithic Power Systems Inc. MCS1823GQTE-320BRN-P

Overview

MCS1823GQTE-320BRN-P from Monolithic Power Systems is a bidirectional linear Hall-effect current sensor IC with integrated over-current detection (OCD), designed for high-accuracy AC/DC current sensing in space-constrained power systems. It features ±20A rated current range, 66 mV/A sensitivity, 0.6 mΩ internal conductor resistance, 120 kHz bandwidth, and ±2.5% total output error across –40°C to +125°C. It is used in motor control inverters where precise real-time current feedback and fast fault response (<1.5 µs OCD) are critical.

For engineers reviewing the MCS1823GQTE-320BRN-P datasheet, MCS1823GQTE-320BRN-P pinout, MCS1823GQTE-320BRN-P application, or MCS1823GQTE-320BRN-P equivalent, this page delivers verified technical context, validated pin functions, confirmed performance specifications, and application-specific design value - all extracted directly from the official MPS Rev. 1.0 datasheet dated April 2023.

Technical Context

The MCS1823GQTE-320BRN-P employs a differential Hall array architecture that cancels stray magnetic fields via spatial separation of two sensing points (PMCF1 = 1.15 mT/A, PMCF2 = 0.25 mT/A), enabling immunity to external gradient fields. Its spinning current technique minimizes offset drift, achieving ±10 mV zero-current offset over temperature.

It integrates a dedicated open-drain /OCD output with user-configurable threshold (via external pull-up resistor, 10–500 kΩ), delivering 1 µs response time and ±10% OCD error. The analog VOUT is ratiometric (VCC/2 at IP = 0A), supporting direct interfacing with 3.3V ADCs without scaling.

Key Specifications

Pinout & Package

TQFN-12 (3 mm × 3 mm, 0.5 mm pitch) ultra-small surface-mount package with exposed thermal pad; RoHS-compliant, halogen-free, MSL Level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Hall-effect current sensing applications.

Compared with ACS724LLCTR-20AB-T, MCS1823GQTE-320BRN-P saves 65% PCB area and embeds OCD functionality; versus TLE4972-2000-4-SP, it offers simpler analog integration and lower latency for hard real-time protection, at the cost of no built-in diagnostics.

Availability

MCS1823GQTE-320BRN-P is available at Aetrix Electronics and suitable for motor control inverters, switch-mode power supplies, and automotive HVAC systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MCS1823GQTE-320BRN-P 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 compact, high-efficiency current sensing in space- and thermal-constrained applications such as motor drives and power supplies, emphasizing integration, accuracy, and fast fault response.

FAQ

What is the maximum continuous current the MCS1823GQTE-320BRN-P can measure without saturation?

The device maintains linearity up to ±20A (IPMAX) with ±2.5% total error. Beyond this, VOUT remains proportional but nonlinearity increases; saturation occurs at VOUT(H) = VCC – 0.3V and VOUT(L) = 0.3V (3.3V supply), corresponding to ~±30.3A based on 66 mV/A sensitivity.

Can the /OCD threshold be adjusted below ±10A for this part number?

Yes. With an external pull-up resistor (RPULLUP) between /OCD and VCC, the OCD threshold is configurable from 50% to 240% of IPMAX (±20A), i.e., ±10A to ±48A. For thresholds below ±10A, a different variant (e.g., MCS1823GQTE-310BRN) is required.

Is the VOUT output ratiometric or absolute for MCS1823GQTE-320BRN-P?

This part uses the "R" suffix in its ordering code (MCS1823GQTE-320BRN-P), indicating ratiometric VOUT mode. At IP = 0A, VOUT = VCC/2 = 1.65V (typical) with ±1% ratiometry error over supply variation (3.0–3.6V).

Does the MCS1823GQTE-320BRN-P provide galvanic isolation?

No. It provides basic functional isolation per IEC62368-1 with VIOWM = 100 VPK/DC, but not reinforced or safety-rated isolation. It relies on internal dielectric barriers and package creepage/clearance - not transformer or optocoupler-based isolation.

What is the recommended PCB layout for minimizing magnetic interference?

Route IP+ and IP− traces symmetrically and in parallel, with minimal loop area; keep sensitive analog traces (VOUT, GND) away from high-dI/dt paths; place 0.1 µF bypass capacitor within 2 mm of VCC pin; avoid placing ferromagnetic materials within 5 mm of the package top surface.

How does the spinning current technique improve offset stability?

Spinning current periodically rotates the Hall plate bias direction, averaging out process-induced mismatches and thermally induced offsets. This achieves ±10 mV zero-current offset over –40°C to +125°C, eliminating need for external nulling or frequent recalibration.

Is the TQFN-12 package lead-free and RoHS-compliant?

Yes. All MCS1823 variants, including MCS1823GQTE-320BRN-P, are lead-free, halogen-free, and fully compliant with the EU RoHS directive. The package is MSL Level 1, allowing unlimited floor life at ≤30°C/60% RH.