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ACS37800 Dataheets PDF



Part Number ACS37800
Manufacturers Allegro
Logo Allegro
Description Power Monitoring
Datasheet ACS37800 DatasheetACS37800 Datasheet (PDF)

ACS37800 Isolated, Digital Output, Power Monitoring IC with Zero-Crossing Detection, Overcurrent and Overvoltage Flagging FEATURES AND BENEFITS • Accurate power monitoring for AC and DC applications • UL 60950-1 (ed. 2) and UL 62368-1 (ed. 1) certified for reinforced isolation up to 517 VRMS in a single package • Accurate measurements of active, reactive, and apparent power, as well as power factor • Separate RMS and instantaneous measurements for both voltage and current channels • Two program.

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ACS37800 Isolated, Digital Output, Power Monitoring IC with Zero-Crossing Detection, Overcurrent and Overvoltage Flagging FEATURES AND BENEFITS • Accurate power monitoring for AC and DC applications • UL 60950-1 (ed. 2) and UL 62368-1 (ed. 1) certified for reinforced isolation up to 517 VRMS in a single package • Accurate measurements of active, reactive, and apparent power, as well as power factor • Separate RMS and instantaneous measurements for both voltage and current channels • Two programmable averaging blocks • 0.85 mΩ primary conductor resistance for low power loss and high inrush current withstand capability • Compatible with floating and non-floating GND • Dedicated voltage or current zero crossing pin • Fast, user-programmable overcurrent fault pin (5 µs typ.) • User-programmable undervoltage and overvoltage RMS thresholds • 1 kHz bandwidth • Current sensing range up to 90 A • Options for I2C or SPI digital interface protocols PACKAGE 16-pin SOICW (suffix MA) Not to scale DESCRIPTION The Allegro ACS37800 power monitoring IC greatly simplifies the addition of power monitoring to many AC or DC powered systems. The sensor may be powered from the same supply as the system’s MCU, eliminating the need for multiple power supplies. The device’s construction includes a copper conduction path that generates a magnetic field proportional to applied current. The magnetic field is sensed differentially to reject errors introduced by common mode fields. Allegro’s Hall-effect-based, galvanically isolated current sensing technology achieves reinforced isolation ratings (4800 VRMS) in a small PCB footprint. These features enable isolated current sensing without expensive Rogowski coils, oversized current transformers, isolated operational amplifiers, or the power loss of shunt resistors. The ACS37800 power monitoring IC offers key power measurement parameters that can easily be accessed through its SPI or I2C digital protocol interfaces. Dedicated and configurable I/O pins for voltage/current zero crossing, undervoltage and overvoltage reporting, and fast overcurrent fault detection are available in I2C mode. User configuration of the IC is available through on-chip EEPROM. The ACS37800 is provided in a small low-profile surface mount SOIC16 wide-body package, is lead (Pb) free, and is fully calibrated prior to shipment from the Allegro factory. Customer calibration can further increase accuracy in application. CB Certificate Number: US-32210-M1-UL US-36315-UL L (N) N (L) 1 MΩ REINFORCED ISOLATION 1 MΩ 1 MΩ 1 MΩ RSENSE 1 16 IP+ ACS37800 VINP 2 IP+ 15 VINN 3 IP+ 14 GND 4 IP+ 13 VCC IP 5 12 IP- SDA / MISO 6 IP- 11 SCL / SCLK 7 IP- 10 DIO_0 / MOSI 8 IP- 9 DIO_1 / CS I2C Only RPULLUP MCU GND VCC RPULLUP Single Output Isolated Power Supply (Flyback, etc.) Linear Regulator To User ACS37800-DS, Rev. 3 MCO-0001004 Figure 1: Typical Application March 17, 2022 ACS37800 Isolated, Digital Output, Power Monitoring IC with Zero-Crossing Detection, Overcurrent and Overvoltage Flagging SELECTION GUIDE Part Number ACS37800KMACTR-015B5-SPI ACS37800KMACTR-030B3-SPI ACS37800KMACTR-030B3-I2C ACS37800KMACTR-090B3-I2C VCC(typ) (V) 5 3.3 3.3 3.3 [1] Contact Allegro for additional packing options. IPR (A) ±15 ±30 ±30 ±90 Communication Protocol SPI I2C TA (°C) –40 to 125 Packing [1] Tape and reel, 1000 pieces per reel, 3000 pieces per box ACS 37800 K MAC TR - 015 B 5 - SPI Communication Protocol Supply Voltage: 5 – VCC = 5 V 3 – VCC = 3.3 V Output Directionality: B – Bidirectional Current Sensing Range (A) Packing Designator Package Designator Operating Temperature Range 5 Digit Part Number Allegro Current Sensor 2 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ACS37800 Isolated, Digital Output, Power Monitoring IC with Zero-Crossing Detection, Overcurrent and Overvoltage Flagging ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Reverse Supply Voltage Input Voltage Reverse Input Voltage Digital I/O Voltage Reverse Digital I/O Voltage Maximum Continuous Current Operating Ambient Temperature Junction Temperature Storage Temperature Symbol VCC VRCC VINP, VINN VRNP, VRNN VDIO VRDIO ICMAX TA TJ(max) Tstg Notes SPI, I2C, and general purpose I/O TA = 25°C Range K Rating 6.5 –0.5 VCC + 0.5 –0.5 6 –0.5 60 –40 to 125 165 –65 to 170 Units V V V V V V A °C °C °C ISOLATION CHARACTERISTICS Characteristic Symbol Dielectric Strength Test Voltage VISO Notes Agency type-tested for 60 seconds per UL 60950-1 (edition 2) and UL 62368-1 (edition 1); Production tested at 3000 VRMS for 1 second, in accordance with UL 60950-1 (edition 2) and UL 62368-1 (edition 1) Working Voltage for Basic Isolation VWVBI Maximum approved working voltage for basic (single) isolation according to UL 60950-1 (edition 2) and UL 62368-1 (edition 1) Rating 4800 1480 1047 Working Voltage for Reinfo.


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