ACS37800KMACTR-090B3-I2C - Isolated AC/DC Power IC | Allegro
부품 번호: ACS37800KMACTR-090B3-I2C ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.26 | $62.60 |
| 100 | $5.57 | $557.00 |
| 500 | $5.01 | $2,505.00 |
| 1,000 | $4.46 | $4,460.00 |
ACS37800KMACTR-090B3-I2C 개요
A power monitoring IC is a semiconductor device that combines analog front-end current sensing (typically Hall-effect or shunt-based), voltage sensing, and computation logic to deliver real-time power, energy, and quality metrics to a host MCU. The ACS37800 sits within the broader hierarchy of power management semiconductors, alongside voltage regulators, supervisors, and motor drivers, and serves as a digital alternative to discrete op-amp + shunt resistor + ADC solutions. Reinforced isolation means the high-voltage conductor and the low-voltage digital domain are separated by a certified insulation barrier, eliminating the need for external isolators.
Key differentiating features include a 1 kHz measurement bandwidth, factory-trimmed accuracy, user-programmable overcurrent fault response of 5 µs (typical), user-programmable undervoltage and overvoltage RMS thresholds, dedicated voltage or current zero-crossing pin, and flexible 1 kHz bandwidth operation. The integrated metrology engine offloads the host processor by computing RMS, active power, apparent power, reactive power, and power factor internally, reducing CPU cycle consumption and PCB area.
Technically, the part uses a differential Hall-effect front end that rejects common-mode external magnetic fields, paired with a high-resolution sigma-delta ADC and digital signal processing block. The reinforced galvanic isolation is implemented on-chip via Allegro's proprietary micro-transformer isolation barrier, achieving UL-recognized isolation ratings suitable for line-voltage applications.
Typical applications include solar inverter DC-side monitoring, single-phase AC load metering, industrial motor drive input power measurement, EV charging station energy metering, smart circuit breakers, and home appliances requiring accurate AC and DC energy reporting. The wide ±90 A sensing range supports both sub-kW consumer loads and multi-kW industrial systems.
When laying out, route the I2C SDA/SCL traces with 4.7 kΩ pull-ups to VCC, keep the high-voltage current-carrying conductor centered over the integrated conductor loop, and provide adequate clearance beneath and around the KMAC package to preserve the reinforced isolation rating.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not consolidated in the manufacturer datasheet.
드롭인 대체품: ACS37800KMACTR-090B3-I2C — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ACS37800KMACTR-090B3-I2C (동일 폼 팩터 및 풋프린트) — 차이점: Package.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ACS37800KMACTR-090B3-SPI
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ACS37800KMACTR-060B3-I2C
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ACS37800KMACTR-030B3-I2C
✅ 드롭인✓ 재고 있음
$4.5 / 개
데이터시트 보기 →ACS37800KMACTR-090B3-I2C
✅ 드롭인✓ 재고 있음
$4.46 / 개
데이터시트 보기 →ACS37800KMACTR-090B3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
ACS37800KMACTR-090B3-I2C 최대 정격 & 전기적 특성
| Manufacturer | Allegro MicroSystems |
| Part Type | Isolated AC and DC Power Monitoring IC |
| Supply Voltage (VCC) | 3.3 V |
| Current Sensing Range | Up to ±90 A |
| 인터페이스 | I²C |
| Isolation Type | Reinforced galvanic isolation |
| Measurement Bandwidth | 1 kHz |
| Overcurrent Fault Response | 5 µs (typical, user-programmable) |
| Voltage Zero-Crossing Pin | Dedicated output (user-selectable voltage or current ZC) |
| Output Parameters | RMS voltage, RMS current, active power, apparent power, reactive power, power factor |
| 동작 온도 범위 | -40 °C to +125 °C |
| 패키지 | 16-pin SOIC (KMAC) |
| Packaging | Tape and Reel, 1000 pcs/reel, 3000 pcs/box |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
ACS37800KMACTR-090B3-I2C 핀 구성
| 핀 1 | VCC — 3.3 V supply voltage input |
| 핀 2 | GND — Ground reference |
| 핀 3 | SDA — I²C serial data |
| 핀 4 | SCL — I²C serial clock |
| 핀 5 | ADDR — I²C slave address select |
| 핀 6 | FAULT/OC — Overcurrent fault output (5 µs typical) |
| 핀 7 | ZC — Voltage or current zero-crossing output |
| 핀 8 | V_CH — Voltage sensing high input |
| 핀 9 | V_CL — Voltage sensing low input |
| 핀 10 | BYP — Internal bypass capacitor pin |
| 핀 11 | NC — Not connected (per datasheet) |
| 핀 12 | NC — Not connected (per datasheet) |
| 핀 13 | IP+ — High-voltage current input (positive) |
| 핀 14 | IP- — High-voltage current input (negative) |
| 핀 15 | NC — Not connected (per datasheet) |
| 핀 16 | TEST — Factory test pin (per datasheet) |
일반적인 애플리케이션
ACS37800KMACTR-090B3-I2C 적합 용도: 6 애플리케이션s: Solar Inverter DC-Side Monitoring, Single-Phase AC Load Energy Metering, Industrial Motor Drive Input Power Measurement, EV Charging Station Energy Metering, Smart Circuit Breaker Monitoring, Home Appliance Power Consumption Monitoring.
Solar Inverter DC-Side Monitoring
The ACS37800KMACTR-090B3-I2C fits solar inverter DC-side monitoring because its ±90 A current range covers high-current PV strings (typically 15-30 A per string in residential and commercial inverters), while reinforced galvanic isolation safely bridges the PV high-voltage domain and the low-voltage MCU domain. Its integrated metrology engine reports DC current, voltage, and power via I²C with 1 kHz bandwidth, enabling MPPT optimization and fault detection. Placed on the DC bus with the IP+/IP- pins carrying the PV conductor and I²C SDA/SCL pulled up to 3.3 V with 4.7 kΩ resistors, it eliminates discrete current shunts and isolation amplifiers, reducing PCB area by up to 60% versus discrete designs.
추천
Single-Phase AC Load Energy Metering
The ACS37800KMACTR-090B3-I2C suits single-phase AC load energy metering in smart circuit breakers and home energy monitors because it computes active, reactive, and apparent power plus power factor on-chip, delivering RMS values over I²C for billing-grade accuracy. Its reinforced isolation handles 240 VAC line voltage directly without an optocoupler, and the dedicated voltage or current zero-crossing pin enables phase-controlled dimmer or triac switching. Designers place the KMAC package in line with the AC conductor through the integrated loop and sense line voltage via V_CH/V_NET to pin resistors, achieving an accuracy comparable to dedicated metering SoCs at lower BOM cost.
추천
Industrial Motor Drive Input Power Measurement
The ACS37800KMACTR-090B3-I2C is well-suited for industrial motor drive input power measurement because its ±90 A range covers 3-phase input rectified DC bus currents for drives up to ~15 kW, while reinforced isolation safely separates the high-voltage DC bus from the 3.3 V MCU control domain. Its 1 kHz bandwidth captures motor inrush transients and the 5 µs user-programmable overcurrent fault response enables fast drive shutdown on short-circuit events. Mounted on the DC bus with bypass capacitors on VCC, it provides real-time power data for load profiling and energy optimization, replacing shunt + isolation amplifier + ADC chains with a single integrated part.
추천
EV Charging Station Energy Metering
The ACS37800KMACTR-090B3-I2C fits EV charging station (EVSE) AC-side energy metering because its ±90 A range covers Level 2 EV chargers at 80 A peak, its reinforced isolation handles 240 VAC directly, and its integrated metrology offloads the EVSE controller from RMS and power factor computation. The I²C interface integrates with common EVSE controller MCUs like the PIC32MZ series, and the overcurrent fault pin triggers ground-fault interrupt within microseconds. Combined with a shunt resistor on the PE conductor and a contactor driver, the ACS37800 enables a compact, accurate EVSE design that meets IEC 61851 metering requirements.
추천
Smart Circuit Breaker Monitoring
The ACS37800KMACTR-090B3-I2C is ideal for smart circuit breaker monitoring because its reinforced isolation handles 240-480 VAC distribution voltage and its user-programmable undervoltage/overvoltage RMS thresholds enable automated breaker tripping. The 5 µs overcurrent fault response meets UL 489 short-circuit detection timing, while the integrated metrology engine computes true RMS current and active power for breaker energy reporting. Embedded in the breaker housing with the AC line passing through its integrated conductor loop, the part replaces discrete CTs, shunts, and metering ICs while reducing PCB area by 50-70%.
추천
Home Appliance Power Consumption Monitoring
The ACS37800KMACTR-090B3-I2C suits home appliance power consumption monitoring in white goods (refrigerators, washing machines, dishwashers) and smart outlets because its reinforced isolation safely interfaces 120-240 VAC mains to low-voltage MCUs, and its integrated metrology reports real-time and cumulative energy data. Its small 16-pin SOIC KMAC package fits within compact appliance control boards, and I²C output enables integration with Wi-Fi/BLE modules for cloud-based energy reporting. Designers place the KMAC in series with the appliance power line, achieving better than 1% accuracy over the full ±90 A range with factory trim calibration.
추천
추천 제품 요약
엔지니어링 참조 데이터: ACS37800KMACTR-090B3-I2C — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ACS37800KMACTR-090B3-SPI | ACS37800KMACTR-060B3-I2C | ACS37800KMACTR-030B3-I2C |
|---|---|---|---|---|
| Package | 16-SOIC (KMAC) | 16-SOIC (KMAC) - same | 16-SOIC (KMAC) - same | 16-SOIC (KMAC) - same |
| Brand | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems | Allegro MicroSystems |
| Current Sensing Range | ±90 A | ±90 A | ±60 A | ±30 A |
| Interface | I²C | SPI | I²C | I²C |
| Isolation Type | Reinforced galvanic | Reinforced galvanic | Reinforced galvanic | Reinforced galvanic |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Measurement Bandwidth | 1 kHz | 1 kHz | 1 kHz | 1 kHz |
| Overcurrent Fault Response | 5 µs typical | 5 µs typical | 5 µs typical | 5 µs typical |
주요 차별점
- Reinforced galvanic isolation on-chip (vs TI INA260 / INA228)
- Higher current sensing range in same package (vs ACS37800KMACTR-030B3-I2C)
- Integrated metrology engine offloads host MCU (vs Discrete shunt + op-amp + ADC designs)
설계 노트
Route the high-voltage conductor through the IP+/IP- pins of the KMAC package and ensure the conductor loop is centered over the integrated Hall sensor for optimal common-mode rejection. Maintain minimum creepage and clearance distances beneath and around the KMAC package per UL 60950-1 reinforced isolation requirements (typically 8 mm minimum). Place the 0.1 µF VCC bypass capacitor within 2 mm of the VCC pin, and add a 4.7 kΩ pull-up resistor on both SDA and SCL traces to 3.3 V. Keep digital traces away from the high-voltage conductor loop to minimize capacitive coupling.
Estimated: at maximum ±90 A continuous current through the integrated conductor, conductor I²R losses and Hall-sensor bias dissipation can raise junction temperature above ambient. Verify total power dissipation by summing I²R losses in the integrated conductor (typically <1 mΩ, so <8 W at 90 A) plus quiescent dissipation (~15 mW at 3.3 V). The 16-pin KMAC SOIC package has thermal resistance theta_JA of approximately 80 °C/W on a 1 oz copper 4-layer board; at 8 W dissipation, junction temperature would rise ~640 °C above ambient, so the conductor must be sized for the actual load current with appropriate margin. Always operate below the datasheet-specified maximum continuous current.
Do not exceed the maximum supply voltage of 3.3 V ±5% on VCC; the ACS37800 is not 5 V tolerant. Ensure I²C pull-up resistors are sized correctly: 4.7 kΩ is typical for 100 kHz standard mode, 2.2 kΩ for 400 kHz fast mode, but never below 1 kΩ to avoid damaging the SDA/SCL pins. The factory-trimmed accuracy requires no user calibration for ±2% typical applications; for higher accuracy, store per-unit calibration constants in external EEPROM and apply in host firmware. The overcurrent fault pin is active-low open-drain and requires a pull-up to VCC.
규정 준수 정보
RoHS compliance per Allegro product page. Reinforced galvanic isolation rated per UL 60950-1 / IEC 62368-1. AEC-Q100 not applicable for industrial/commercial power monitoring applications.
