Monolithic Power Systems Inc. MCS1823GQTE-350BRN-Z

Overview

MCS1823GQTE-350BRN-Z 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 systems. It features ±50A rated current range, 26.4 mV/A sensitivity, 0.6 mΩ internal conductor resistance, ±2.5% total output error, and 120 kHz bandwidth - enabling precise motor phase current monitoring in industrial inverters.

For engineers reviewing the MCS1823GQTE-350BRN-Z datasheet, MCS1823GQTE-350BRN-Z pinout, MCS1823GQTE-350BRN-Z application, or MCS1823GQTE-350BRN-Z equivalent, this page delivers verified technical context, validated pin functions, confirmed OCD threshold behavior, and real-world use-value metrics for embedded power stage design and fault protection validation.

Technical Context

The MCS1823GQTE-350BRN-Z employs a differential Hall array to reject external magnetic field gradients, using spinning current offset cancellation for stable zero-current output (±10 mV over -40°C to +125°C). Its primary conductor is internally fused at IP+ and IP− pins, delivering 0.6 mΩ conduction path with no magnetic hysteresis.

It integrates a fast open-drain /OCD output with 1 µs response time and user-configurable threshold (via external pull-up resistor) between 50%–240% of ±50A IPMAX. The ratiometric VOUT scales with VCC (3.3 V supply), maintaining 98–102% ratiometry across supply variation.

Key Specifications

Pinout & Package

TQFN-12 (3 mm × 3 mm, 0.5 mm pitch) package with exposed thermal pad; ultra-small footprint reduces board area by >40% vs. SOIC-8 current sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS724LLCTR-50AB-T and TLE4971-50S4, the MCS1823GQTE-350BRN-Z uniquely combines 3.3 V operation, user-programmable OCD, and 120 kHz bandwidth in a 3 mm × 3 mm footprint - optimizing board space, supply compatibility, and protection configurability for next-gen compact power modules.

Availability

MCS1823GQTE-350BRN-Z is available at Aetrix Electronics and suitable for motor control, audio amplifier protection, and switch-mode power supply current monitoring requiring stable component supply and long-term lifecycle continuity.

Supply support for MCS1823GQTE-350BRN-Z 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, with design centers in the US, China, and Taiwan.

The MCS1823 product line targets compact, high-accuracy current sensing in space- and thermally-constrained power conversion systems - emphasizing integration, magnetic immunity, and factory-trimmed precision over discrete Hall + op-amp solutions.

FAQ

What is the maximum continuous current the MCS1823GQTE-350BRN-Z can measure without saturation?

The device maintains linear output up to ±50 A (IPMAX) with ±2.5% total error. Beyond that, VOUT remains proportional but nonlinearity increases; saturation occurs near ±75 A where VOUT approaches VCC – 0.3 V (high) or 0.3 V (low) at 3.3 V supply. Thermal limits are governed by 0.6 mΩ conductor resistance and PCB copper area.

How is the OCD threshold configured for MCS1823GQTE-350BRN-Z?

The /OCD pin is open-drain and requires an external pull-up resistor (10–500 kΩ) to VCC. Threshold is set between 50% and 240% of ±50 A by selecting RPULLUP per the datasheet curve. For example, 100 kΩ yields ~100% IPMAX (±50 A); no resistor defaults to 100% threshold. OCD error is ±10% of set threshold.

Does MCS1823GQTE-350BRN-Z provide galvanic isolation?

No - it provides basic functional isolation per IEC62368-1 (VIOWM = 100 VPK), not reinforced or safety-rated isolation. The internal conductor and Hall sensors share the same silicon die; isolation is achieved via package creepage/clearance, not transformer or capacitive barriers. External isolation is required for mains-referenced applications.

What is the recommended bypass capacitor for VCC?

A ceramic capacitor of 0.1 µF to 1 µF must be placed between VCC (pin 12) and GND (pin 5), located within 2 mm of the pins. X7R or C0G dielectric is preferred; placement minimizes high-frequency supply noise coupling into the Hall sensor and analog output path.

Can MCS1823GQTE-350BRN-Z measure unidirectional current?

No - the "B" in part number suffix indicates bidirectional polarity. Unidirectional variants (e.g., MCS1823GQTE-335URN) exist with 0–35 A range and different zero-current output (0.33 V at 3.3 V supply). This part's VOUT(Q) is VCC/2 = 1.65 V at 0 A, supporting symmetric ±50 A measurement.

Is the sensitivity temperature-dependent?

Yes - sensitivity error is ±2% over -40°C to +125°C, and ±1.5% over -40°C to +25°C. This is factory-trimmed and includes lifetime drift (±1%). For high-precision applications, system-level calibration at two temperatures may be applied, but most motor control designs operate within the specified error band.

What does the "-Z" suffix indicate in MCS1823GQTE-350BRN-Z?

The "-Z" suffix denotes tape-and-reel packaging per MPS ordering convention. It does not affect electrical performance or marking - the top marking remains "BXPY" (per datasheet), and all specifications match the base part MCS1823GQTE-350BRN.