Monolithic Power Systems Inc. MCS1823GQTE-330BAL-P

Overview

MCS1823GQTE-330BAL-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 ±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 automotive EPS and industrial servo drives.

For engineers reviewing the MCS1823GQTE-330BAL-P datasheet, MCS1823GQTE-330BAL-P pinout, MCS1823GQTE-330BAL-P application, or MCS1823GQTE-330BAL-P equivalent, key selection considerations include its TQFN-12 (3mm×3mm) ultra-small footprint, latched OCD output mode (L), absolute VOUT option (A), 3.3V supply compatibility, and differential Hall array immunity to stray magnetic fields.

Technical Context

The MCS1823GQTE-330BAL-P implements a dual-point differential Hall sensing architecture that cancels external magnetic gradients, using spinning current offset cancellation for stable zero-current drift. Its primary conductor (IP+/IP−) carries up to ±30A with only 0.6 mΩ resistance, generating a localized magnetic field sensed by two matched Hall plates (PMCF1 = 1.15 mT/A, PMCF2 = 0.25 mT/A).

Signal conditioning includes factory-trimmed gain, ratiometric or absolute output selection, and a dedicated open-drain /OCD pin with user-configurable threshold (via external pull-up resistor) and 1 µs response time. The device operates from −40°C to +125°C junction temperature and integrates POR, thermal monitoring, and bandwidth tuning for noise-immune operation.

Key Specifications

Pinout & Package

The MCS1823GQTE-330BAL-P is housed in an ultra-small TQFN-12 package (3 mm × 3 mm, 0.75 mm height) with exposed thermal pad, optimized for high-density power board integration and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS724LMATR-30AB-T and TLE4971-30D5-U, the MCS1823GQTE-330BAL-P uniquely combines ultra-small TQFN-12 size, latched OCD, absolute output, and 1 µs response - making it optimal for space- and safety-critical 3.3 V embedded motor control designs.

Availability

MCS1823GQTE-330BAL-P is available at Aetrix Electronics and suitable for motor control, automotive battery management, and high-frequency SMPS requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MCS1823GQTE-330BAL-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, with design focus on efficiency, integration, and reliability for industrial, automotive, and computing markets.

The MCS1823 product line delivers ultra-compact, high-accuracy Hall-effect current sensors targeting space-constrained power conversion and motor control applications where isolation, speed, and thermal performance are critical.

FAQ

What does the "BAL" suffix indicate in MCS1823GQTE-330BAL-P?

The "BAL" suffix denotes a bidirectional current sensor (B), absolute output mode (A), and latched OCD output (L). This configuration provides a fixed 1.65 V zero-current output at 3.3 V supply and holds the /OCD pin low after fault detection until power is cycled - essential for fail-safe motor control systems.

Can MCS1823GQTE-330BAL-P measure unidirectional current?

No - the "B" in BAL specifies bidirectional operation (±30 A range). For unidirectional sensing (e.g., 0–30 A), select variants with "U" polarity code like MCS1823GQTE-330URN. Using BAL in unidirectional applications wastes half the output range and reduces effective resolution.

Is external magnetic shielding required for MCS1823GQTE-330BAL-P?

No. Its differential Hall array inherently rejects uniform and gradient external magnetic fields - verified by MPS characterization showing >40 dB suppression of 50 Hz–1 MHz interfering fields. Shielding is unnecessary unless extreme localized fields (>100 mT) are present near IP+ or IP− traces.

How is the OCD threshold set for MCS1823GQTE-330BAL-P?

The OCD threshold is fixed at ±100% of IPMAX (±30 A) for BAL variants. Unlike "N" (non-latch) or custom-threshold versions, BAL uses internal factory programming - no external resistor or configuration is needed. The /OCD pin asserts low within 1 µs when |IP| exceeds ±30 A.

What is the thermal performance of the TQFN-12 package under 30 A continuous current?

With 0.6 mΩ conductor resistance, power dissipation is 540 mW at 30 A. In a 4-layer PCB with 2 oz copper and 2 cm² thermal pad copper pour, junction-to-ambient thermal resistance is ~65°C/W, resulting in ~35°C temperature rise above ambient - well within the −40°C to +125°C operating range.

Does MCS1823GQTE-330BAL-P require calibration during system production?

No. Factory trimming ensures ±2.5% total output error across temperature and lifetime without end-of-line calibration. Zero-current offset is ±10 mV max, and sensitivity error is ±2% - sufficient for closed-loop motor control and protection functions without per-unit adjustment.

Is the /OCD pin compatible with 5 V logic systems?

Yes - the /OCD pin is open-drain with 0.3 V max low-level voltage when sinking 4 mA, and supports pull-up to any supply up to 6.5 V. For 5 V logic interfacing, connect a 10–50 kΩ resistor from /OCD to 5 V; no level-shifter is required.