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Allegro

ACS37800 Datasheet Preview

ACS37800 Datasheet

Power Monitoring

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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 M
REINFORCED
ISOLATION
1 M
1 M1 M
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. 1
MCO-0001004
Figure 1: Typical Application
January 27, 2021




Allegro

ACS37800 Datasheet Preview

ACS37800 Datasheet

Power Monitoring

No Preview Available !

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


Part Number ACS37800
Description Power Monitoring
Maker Allegro
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