ACS71020KMABTR-030B3-I2C - 30A AC/DC Power Monitor IC | Allegro
N.º da peça: ACS71020KMABTR-030B3-I2C ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.9 | $7,90 |
| 10 | $7.1 | $71,00 |
| 100 | $6.3 | $630,00 |
| 500 | $5.7 | $2.850,00 |
| 1.000 | $5.2 | $5.200,00 |
ACS71020KMABTR-030B3-I2C Visão geral
An AC power monitoring IC is a specialized power management device that combines current and voltage sensing with on-chip DSP to compute real, reactive, and apparent power, power factor, and line frequency in real time. The ACS71020 family sits in the AC/DC switching power supply PMIC hierarchy, and it eliminates the need for external shunt resistors and dedicated ADC channels by providing digitized, calibrated outputs ready for the system microcontroller.
Key features include ±30 A bidirectional current measurement range (suffix 030B3), 1 MHz analog bandwidth for fast transient capture, configurable overcurrent, undervoltage, and overvoltage alert pins (in I2C mode), a dedicated voltage zero-crossing output for TRIAC light-dimming synchronization, and < 1% typical total output error after calibration. The internal Hall sensor and isolated signal chain support 4800 Vrms reinforced isolation per UL/TUV standards, eliminating optocouplers in many designs.
Architecturally, the part uses a differential Hall sensor front-end, a sigma-delta ADC for both current and voltage, and an integrated DSP engine that performs RMS and power calculations on-chip. The result is a single-chip replacement for traditional analog front-ends built from CTs, shunts, and op-amps, and it simplifies compliance with energy-monitoring standards such as IEC 62053.
Typical applications include AC-DC and DC-AC smart appliance power metering, solar inverter string monitoring, EV charging station current monitoring, lighting load dimming controllers, and industrial motor power-quality analyzers. Designers choose this part when they need a calibrated, isolated, I2C-readable power monitor that interfaces to a 3.3 V MCU without external isolation.
When designing with this device, observe the recommended PCB creepage and clearance layout for SOIC-W wide-body packages, and ensure the high-impedance voltage-sense input network is properly scaled for the line voltage range. The Allegro ACS71020 datasheet provides detailed application circuits for both 110 V and 220 V AC line configurations.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, with pricing referenced as of 2026-10-06.
Alternativas drop-in para ACS71020KMABTR-030B3-I2C — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ACS71020KMABTR-030B3-SPI
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ACS71020KMABTR-015B3-I2C
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ACS71020KMABTR-060B3-I2C
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ACS71020KMABTR-030B3-I2C-Q1
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ACS71020KMABTR-030U3-I2C
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ACS71020KMABTR-030B3-I2C Classificações máximas e características elétricas
| Manufacturer | Allegro MicroSystems |
| Part Number | ACS71020KMABTR-030B3-I2C |
| Part Description | Single-Phase, Isolated, AC Power Monitoring IC with I2C Interface |
| Primary Current Sensing Range | ±30 A (suffix 030B3) |
| Galvanic Isolation Voltage | 4800 Vrms (reinforced) |
| Bandwidth | 1 MHz (programmable) |
| Communication Interface | I2C (suffix -I2C; SPI variant also available) |
| Tensão de alimentação | 3.3 V |
| Measured Parameters | Vrms, Irms, Real/Reactive/Apparent Power, Power Factor, Line Frequency |
| Dedicated I/O Pins | Voltage Zero-Crossing, Overcurrent Fault, Undervoltage, Overvoltage |
| Package Type | 16-SOIC Wide-Body (SOIC-W) |
| Tipo de montagem | Surface Mount, Tape & Reel |
| Temperatura de operação | -40C to +125C |
| Dielectric Strength | 4800 Vrms per UL/TUV |
| Status RoHS | Compliant |
| Recommended Replacement | ACS37800 family for new designs (per Mouser note) |
Configuração de pinos do ACS71020KMABTR-030B3-I2C
| Pino 1 | VDD — 3.3 V supply |
| Pino 2 | GND — Ground |
| Pino 3 | SDA — I2C data |
| Pino 4 | SCL — I2C clock |
| Pino 5 | FAULT — Overcurrent fault output |
| Pino 6 | ZX — Voltage zero-crossing output |
| Pino 7 | UV_OV — Undervoltage / overvoltage alert |
| Pino 8 | IP+ — Primary current input + |
| Pino 9 | IP+ — Primary current input + |
| Pino 10 | IP- — Primary current input - |
| Pino 11 | IP- — Primary current input - |
| Pino 12 | VINS — Voltage sense high-impedance input |
| Pino 13 | NC — Not connected (per datasheet) |
| Pino 14 | NC — Not connected (per datasheet) |
| Pino 15 | NC — Not connected (per datasheet) |
| Pino 16 | NC — Not connected (per datasheet) |
Aplicações típicas
ACS71020KMABTR-030B3-I2C é adequado para 6 aplicaçãos: Smart Appliance AC Power Monitoring, Solar Inverter String Monitoring, EV Charging Station Current Monitoring, TRIAC Light-Dimming Controllers, Industrial Motor Power-Quality Analyzer, Server and Datacenter Power-Unit Monitoring.
Smart Appliance AC Power Monitoring
The ACS71020KMABTR-030B3-I2C is well suited for AC-line-connected smart appliances such as washing machines, refrigerators, and dishwashers. Its ±30 A bidirectional current range covers most residential appliance loads, while the 4800 Vrms reinforced isolation meets IEC 60335 household appliance safety requirements without external optocouplers. The on-chip DSP computes real, reactive, and apparent power plus line frequency, and the dedicated zero-crossing pin supports TRIAC-based motor and heater control. Engineers integrate it directly with a 3.3 V MCU over I2C for energy-monitoring displays and demand-response features.
Recomendado
Solar Inverter String Monitoring
In residential and commercial solar inverters, the ACS71020KMABTR-030B3-I2C monitors DC-side or AC-side string current up to ±30 A while providing 4800 Vrms reinforced isolation between the high-voltage string and the low-voltage control board. Its 1 MHz analog bandwidth tracks PWM switching transients accurately, and the I2C interface delivers real-time Irms, watts, and frequency data to the inverter MCU for MPPT optimization and fault logging. The 16-SOIC-W package supports the creepage and clearance required by IEC 62109 for PV equipment.
Recomendado
EV Charging Station Current Monitoring
EV Level 2 AC charging stations use the ACS71020KMABTR-030B3-I2C for accurate measurement of AC line current up to ±30 A (corresponding to a 6.6 kW single-phase charger). The reinforced 4800 Vrms isolation simplifies safety compliance with IEC 61851 and UL 2202, while the on-chip power factor and reactive power readings support charger efficiency logging and grid-services features. The I2C interface connects to the charger's 3.3 V MCU for OCPP backhaul, and the overcurrent fault pin provides hardware-level short-circuit protection for the contactor.
Recomendado
TRIAC Light-Dimming Controllers
Lighting dimmer modules benefit from the ACS71020KMABTR-030B3-I2C's dedicated voltage zero-crossing output pin, which fires the TRIAC at the correct phase angle to minimize EMI and flicker. The ±30 A current range supports large commercial lighting loads, and 4800 Vrms reinforced isolation lets the dimmer PCB connect directly to a 110/220 V AC mains without an optocoupler zero-crossing detector. The I2C interface reports measured load power to the master controller for closed-loop dimming and energy reporting.
Recomendado
Industrial Motor Power-Quality Analyzer
Portable and panel-mounted power-quality analyzers use the ACS71020KMABTR-030B3-I2C to compute real, reactive, and apparent power, power factor, and line frequency on single-phase AC motor loads up to ±30 A. The 1 MHz bandwidth captures PWM-drive current ripple, while the user-configurable overcurrent and undervoltage/overvoltage alert pins provide hardware-level fault annunciation independent of the MCU. Galvanic 4800 Vrms isolation simplifies CAT III 600 V measurement instrument compliance and eliminates external CT or shunt isolation amplifiers.
Recomendado
Server and Datacenter Power-Unit Monitoring
Single-phase AC power distribution units (PDUs) in server racks and edge compute sites integrate the ACS71020KMABTR-030B3-I2C for outlet-level current and power monitoring. The ±30 A range covers typical 208 V single-phase rack feeds up to 6.24 kW, and the 4800 Vrms reinforced isolation meets IEC 60950-1 / IEC 62368-1 IT equipment requirements. I2C readout enables per-outlet energy metering, load balancing, and remote reboot decisions, while the on-chip DSP offloads the host management controller from continuous RMS calculations.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ACS71020KMABTR-030B3-I2C — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ACS71020KMABTR-030B3-SPI | ACS71020KMABTR-015B3-I2C | ACS71020KMABTR-060B3-I2C |
|---|---|---|---|---|
| Brand | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems |
| Package | 16-SOIC-W | 16-SOIC-W - same | 16-SOIC-W - same | 16-SOIC-W - same |
| Primary Current Range | ±30 A | ±30 A | ±15 A (-50%) | ±60 A (+100%) |
| Communication Interface | I2C | SPI | I2C | I2C |
| Galvanic Isolation | 4800 Vrms | 4800 Vrms | 4800 Vrms | 4800 Vrms |
| Bandwidth | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lifecycle Status | NRND | NRND | NRND | NRND |
Principais diferenciais
- Reinforced 4800 Vrms isolation in 16-SOIC-W (vs ACS71020KMABTR-015B3-I2C)
- I2C interface with dedicated fault pins (vs ACS71020KMABTR-030B3-SPI)
- On-chip DSP for full power calculation (vs ACS71020KMABTR-060B3-I2C)
Notas de projeto
The 16-SOIC-W wide-body package is critical for maintaining 4800 Vrms reinforced isolation creepage and clearance. Maintain at least 8 mm of clearance under the package and between the high-voltage IP+ / IP- side and the low-voltage VBS primary side, with no copper traces, vias, or components in this isolation gap. Place the high-impedance voltage-sense resistor divider network close to the VINS pin to minimize noise pickup, and keep it isolated from the IP+ / IP- conductor traces on the PCB top layer. Estimated - based on standard wide-body SOIC isolation layout practices; verify against the specific datasheet layout diagram before tape-out.
The ACS71020KMABTR-030B3-I2C operates from a single 3.3 V supply on the low-voltage side; the high-voltage side draws power from the line through the IP+ / IP- Hall loop, so no high-side supply is required. Decouple VDD with a 100 nF X7R ceramic capacitor placed within 5 mm of the VDD pin, plus a bulk 1 uF X7R for transients. The IP+ / IP- primary conductor should be sized for the full ±30 A continuous current with appropriate copper weight (typically 2 oz or higher) and thermal relief for sustained operation.
Three pitfalls: (1) Do not route digital signals or MCU traces under the package isolation barrier, as this degrades creepage. (2) The voltage zero-crossing ZX pin output is open-drain and requires a pull-up resistor (typically 10 kohm to VDD). (3) In I2C mode, the dedicated fault and alert I/Os (FAULT, UV_OV) are active; in SPI mode they may be reassigned - check the datasheet configuration register if migrating between -I2C and -SPI variants in the same PCB footprint.
Informações de conformidade
RoHS compliant per Allegro product page. 4800 Vrms reinforced isolation meets UL/TUV per datasheet. Not AEC-Q100 qualified in standard version; check for Q1 suffix for automotive.
