Monolithic Power Systems Inc. MCS1823GQTE-550BRN-P

Overview

MCS1823GQTE-550BRN-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 ±50 A rated current range, 40 mV/A sensitivity at 5 V supply, 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-550BRN-P datasheet, MCS1823GQTE-550BRN-P pinout, MCS1823GQTE-550BRN-P application, or MCS1823GQTE-550BRN-P equivalent, this device delivers ratiometric analog output, fast 1 µs OCD response, differential stray-field immunity, and TQFN-12 (3 mm × 3 mm) packaging optimized for high-density PCB layouts in automotive and industrial power conversion.

Technical Context

The MCS1823GQTE-550BRN-P employs a differential Hall array with spinning current offset cancellation to reject external magnetic gradients and achieve stable zero-current output voltage (2.5 V at 5 V supply). Its primary conductor is fused and integrated into the package, delivering low thermal drift and no magnetic hysteresis across -40°C to +125°C junction temperature.

It integrates a POR-regulated internal power supply, dynamic offset compensation, and a dedicated /OCD open-drain output with user-configurable threshold (via external pull-up resistor) between 50%–240% of IPMAX. The functional block includes dual Hall transducers, EA-based signal conditioning, and BW tuning for consistent 120 kHz response.

Key Specifications

Pinout & Package

TQFN-12 (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad; ultra-small footprint reduces board area by >40% vs. SOIC-8 current sensors while maintaining isolation rating (VIOWM = 100 VPK/DC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ACS724LLCBTR-50AB-T and TLE4972-50B5-C, the MCS1823GQTE-550BRN-P uniquely combines 120 kHz bandwidth, 1 µs OCD, TQFN-12 size, and field-gradient immunity - making it optimal for high-density, high-speed power converters where PCB area and protection latency are critical.

Availability

MCS1823GQTE-550BRN-P is available at Aetrix Electronics and suitable for motor control, industrial switch-mode power supplies, and automotive on-board chargers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MCS1823GQTE-550BRN-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 delivers ultra-compact, isolated current sensing solutions targeting space-constrained, high-reliability applications in automotive electrification, industrial automation, and renewable energy systems.

FAQ

What is the maximum continuous current the MCS1823GQTE-550BRN-P can measure without saturation?

The device maintains linearity up to ±50 A (IPMAX), with analog output remaining proportional beyond that range until reaching saturation voltages (VOUT(H) = VCC – 0.5 V, VOUT(L) = 0.5 V). At ±50 A, output spans 0–5 V centered at 2.5 V; nonlinearity remains ≤0.5% within the rated range.

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

The OCD threshold is configured externally using a pull-up resistor (RPULLUP = 10–500 kΩ) from /OCD to VCC. Threshold scales linearly from 50% to 240% of ±50 A depending on RPULLUP value - e.g., 100 kΩ yields ~100% IPMAX (±50 A), per datasheet Figure 11 and Table 1.

Does the MCS1823GQTE-550BRN-P require external calibration for production use?

No. Factory trimming ensures ±2.5% total output error across -40°C to +125°C without system-level calibration. Sensitivity (40 mV/A), zero-current output (2.5 V), and offset are pre-characterized and compensated on-die using spinning current and dynamic offset cancellation.

Can the MCS1823GQTE-550BRN-P be used in high-voltage DC applications like EV battery monitoring?

Yes - it meets IEC62368-1 basic isolation with VIOWM = 100 VPK/DC. For 400–800 V DC bus monitoring, it must be placed on the low-side (ground-referenced) current path with appropriate creepage/clearance layout; high-side sensing requires additional isolation barriers.

What is the thermal performance impact of the 0.6 mΩ conductor resistance?

At 50 A DC, power dissipation is 1.5 W (I²R = 50² × 0.0006). In the TQFN-12 package with exposed thermal pad, this results in ~45°C junction-to-ambient rise (per typical θJA ≈ 30°C/W), staying well below the 165°C absolute max junction temperature under standard PCB copper pour conditions.

Is the VOUT output ratiometric or absolute for this specific part number?

MCS1823GQTE-550BRN-P uses ratiometric output mode (denoted by "R" in part numbering: …GQTE-550BRN… → "R" = Ratiometric). Thus VOUT(Q) = VCC / 2 = 2.5 V at 0 A, and full-scale swing scales directly with VCC variations - simplifying supply tolerance handling in noisy environments.

Are pins 7–10 truly unused, or do they serve thermal or ESD functions?

Pins 7–10 are No Connect (NC) - electrically unconnected and unbonded. They serve no thermal or ESD function; the thermal pad (EP) is the sole thermal path. Routing traces or applying solder to these pins risks mechanical stress, parasitic coupling, or contamination-induced leakage.