company blog about Allegro ACS37800KMACTR-030B3-I2C — Isolated AC/DC Power Monitoring IC

Mingjiada Electronics: Brand-new, genuine, in-stock Allegro ACS37800KMACTR-030B3-I2C — Isolated AC/DC Power Monitoring IC. Inquiries Welcome!

Product Overview

The ACS37800KMACTR-030B3-I2C is a highly integrated, isolated power monitoring IC from Allegro MicroSystems, designed for real-time monitoring of voltage, current, and power in AC and DC systems. This device utilizes Allegro’s advanced Hall-effect technology to achieve electrically isolated current sensing, eliminating the need for external shunt resistors, current transformers, or Rogowski coils, thereby significantly simplifying system design and reducing PCB footprint.

The chip supports I²C digital interface communication and integrates protection features such as voltage/current zero-crossing detection, overcurrent fault flagging, and under-voltage/over-voltage alarms, making it an ideal choice for applications such as smart lighting, IoT devices, server power supplies, and industrial automation.

Key Specifications

Manufacturer: Allegro MicroSystems

Model: ACS37800KMACTR-030B3-I2C

Product Type: Isolated Digital Output Power Monitoring IC

Current Detection Range: ±30 A (for the 030B3 configuration of this model)

Isolation Level: Reinforced isolation, rated up to 517 VRMS (UL certified), with a withstand voltage of 4800 VRMS

Operating Voltage (VCC): 2.97 V to 3.63 V, typical 3.3 V

Quiescent Current (Iq): 12 mA (typical)

Interface Protocol: I²C (specified by the -I2C suffix in this model)

Accuracy: Total current error: ±2% to ±2.7%; Total voltage error: ±1%

Bandwidth: 1 kHz (main signal path)

Overcurrent response time: Typical 5 µs (fast fault detection)

Operating temperature: -40°C to +125°C (industrial grade)

Package type: SOIC-16 wide body (surface mount)

RoHS status: RoHS compliant (lead-free)

Key Features

🔹 Highly integrated, simplifying BOM costs

A single chip integrates power, voltage, and current monitoring with enhanced isolation capabilities, enabling safe measurements without the need for external isolation amplifiers, current transformers, or Rogowski coils, significantly reducing the number of peripheral components.

🔹 Simultaneous AC and DC measurement support

It can simultaneously measure active power, reactive power, and apparent power in both AC and DC systems, as well as the RMS (root mean square) and instantaneous values of voltage and current, and supports power factor calculation.

🔹 User-Programmable Configuration

Through on-chip EEPROM, users can flexibly configure under-voltage/over-voltage thresholds, overcurrent trip points, averaging filter parameters, and more to meet the requirements of different application scenarios.

🔹 Dedicated Fault and Detection Pins (I²C Mode)

Zero-crossing detection pin: Can be used for voltage or current zero-crossing detection, suitable for phase-control applications such as LED dimming

Overcurrent fault pin: Fast response (typically 5 µs), suitable for short-circuit protection

Undervoltage/overvoltage flag: The pin can be configured to flag VRMS undervoltage or overvoltage events

🔹 Low Power Consumption and High Reliability

The built-in voltage regulator allows sharing a 3.3V or 5V power supply with the MCU; the enhanced isolation design ensures safe isolation between the high-voltage and low-voltage sides, making it suitable for systems up to 780V AC/DC.

ACS37800KMACTR-030B3-I2C Typical Applications

Smart Lighting: LED dimming control, energy consumption monitoring

IoT Devices (Smart Plugs): Real-time power consumption tracking for intelligent management

Server and Telecom Power Supplies: Power module efficiency monitoring and predictive maintenance

Industrial Motor Control: Motor current/power monitoring to optimize energy consumption

Renewable Energy Systems: Power monitoring for solar and portable energy systems

Mingjiada Electronics — Your Reliable Supply Partner

Shenzhen Mingjiada Electronics Co., Ltd. was established in 1996 and has been deeply involved in the electronic component distribution sector for nearly three decades, establishing long-term, stable partnerships with internationally renowned semiconductor manufacturers such as Allegro MicroSystems. The company is ISO 9001:2014 certified, and all ACS37800KMACTR-030B3-I2C units supplied are 100% brand-new, genuine, and original.

Stock Availability:

ACS37800KMACTR-030B3-I2C: In stock in Shenzhen; bulk orders accepted

Quality: 100% brand-new, genuine, and from the latest production batch

Delivery: Supports fast global shipping

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Shenzhen Mingjiada Electronics Co., Ltd.

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