Monolithic Power Systems Inc. MCS1823GQTE-330BRN-Z

Overview

MCS1823GQTE-330BRN-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 power systems. It features ±30A rated current range, 44 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 BLDC inverters.

For engineers reviewing the MCS1823GQTE-330BRN-Z datasheet, MCS1823GQTE-330BRN-Z pinout, MCS1823GQTE-330BRN-Z application, or MCS1823GQTE-330BRN-Z equivalent, key selection criteria include ratiometric VOUT option, 1 µs OCD response time, differential Hall array immunity to stray fields, and TQFN-12 (3mm×3mm) package compatibility with high-density PCB layouts.

Technical Context

The MCS1823GQTE-330BRN-Z employs a differential Hall array architecture that cancels external magnetic field gradients, ensuring stable offset via spinning current technique. Its primary conductor (0.6 mΩ) carries up to ±30A while maintaining galvanic isolation per IEC62368-1 (VIOWM = 100 VPK/DC).

Signal conditioning includes factory-trimmed sensitivity (44 mV/A), temperature-compensated offset control, and a dedicated open-drain /OCD output with user-configurable threshold (±IPMAX by default). The analog VOUT is ratiometric to VCC (3.3V supply), supporting direct ADC interfacing without external reference.

Key Specifications

Pinout & Package

TQFN-12 (3mm × 3mm, 0.5 mm pitch) 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-30AB-T and TLE4971-30B5-U, the MCS1823GQTE-330BRN-Z offers superior board-area efficiency (3×3 mm vs. >20 mm²), faster OCD (1 µs), and analog ratiometric output optimized for low-latency analog control loops - making it ideal for compact, high-performance motor and power converter designs.

Availability

MCS1823GQTE-330BRN-Z is available at Aetrix Electronics and suitable for motor control, switch-mode power supplies, and automotive battery management systems requiring stable component supply and long-term production continuity.

Supply support for MCS1823GQTE-330BRN-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, including DC/DC converters, LED drivers, and precision analog sensors.

The MCS1823 product line targets compact, high-efficiency current sensing in power conversion and motion control systems - emphasizing ultra-small packaging, galvanic isolation, and fast fault detection for next-generation energy-efficient designs.

FAQ

What is the maximum continuous current the MCS1823GQTE-330BRN-Z can measure without saturation?

The device maintains linear output up to ±30A (IPMAX) with ±2.5% total error. Beyond this range, VOUT remains proportional but nonlinearity increases; saturation voltages are VCC – 0.3 V (high) and 0.3 V (low) at 3.3V supply, allowing detection up to ~±45A before hard clipping.

How is the over-current detection threshold configured for this part?

The MCS1823GQTE-330BRN-Z defaults to ±IPMAX (±30A) OCD threshold. To adjust, connect an external pull-up resistor (10–500 kΩ) from /OCD to VCC - the threshold scales linearly from 50% to 240% of IPMAX based on RPULLUP value per datasheet Figure 10.

Does this sensor require external calibration for accuracy across temperature?

No. Factory trimming of sensitivity and offset, combined with on-chip temperature compensation, achieves ±2.5% total output error over –40°C to +125°C without system-level calibration - verified per Table 10 in the MCS1823 Rev. 1.0 datasheet.

Can the VOUT pin drive a standard 12-bit SAR ADC directly?

Yes. With 44 mV/A sensitivity and ±30A range, VOUT spans 0.33 V to 2.97 V (ratiometric to 3.3V), delivering 1.32 V full-scale swing. Driving a 4.7 kΩ load with ≤4.7 nF capacitance ensures monotonicity and settling within 1 µs - compatible with most 1 MSPS+ SAR ADCs.

Is the TQFN-12 package thermally enhanced for high-current operation?

Yes. The exposed thermal pad beneath the TQFN-12 package must be soldered to a minimum 100 mm² copper pour with ≥4 thermal vias to internal ground planes. This configuration sustains continuous ±30A operation at +125°C junction temperature with <10°C rise above ambient.

What isolation rating does this device meet, and how is it implemented?

The MCS1823GQTE-330BRN-Z meets IEC62368-1 basic insulation with VIOWM = 100 VPK/DC. Isolation is achieved via monolithic die construction - the Hall sensor and signal chain are physically separated from the primary conductor by molded compound, eliminating need for external isolators or optocouplers.

How does the differential Hall array reject external magnetic interference?

Two matched Hall elements sense magnetic fields at spatially separated points above the conductor. Stray uniform fields induce equal signals in both elements, which cancel in the differential amplifier stage; only the field gradient from the primary current produces net output - rejecting >99% of common-mode EMI from nearby inductors or cables.