Product Overview
The Allegro ACS772 family of current sensor ICs offers economical and precise solutions for AC or DC current sensing. Ideal for motor control, load detection and management, power supply and DC-to-DC converter control, and inverter control, these sensors provide a 2.5 s response time for overcurrent fault detection in safety-critical applications. They utilize a precision, low-offset linear Hall circuit with a copper conduction path to generate a magnetic field, which is converted into a proportional voltage. Key features include factory calibration, proprietary digital temperature compensation for improved accuracy and stability, and integrated shield technology for high-level immunity to dV/dt and stray electric fields, ensuring low output voltage ripple and offset drift in high-voltage applications. The devices offer reinforced galvanic isolation, simplifying high-side current sensing in high-voltage systems.
Product Attributes
- Brand: Allegro
- Certifications: AEC-Q100 Grade 1 qualified, UL60950-1, UL62368-1
- Material: Lead (Pb) free, 100% matte tin plating, oxygen-free copper leadframe
- Package Type: 5-pin package (suffix CB)
Technical Specifications
| Model | Primary Sampled Current (IP) | Sensitivity (Typ.) | Nominal Temperature Range | Output Directionality |
|---|---|---|---|---|
| ACS772LCB-050U-PFF-T | 50 A | 80 mV/A | 40 to 150 C | Unidirectional |
| ACS772LCB-050B-PFF-T | 50 A | 40 mV/A | 40 to 150 C | Bidirectional |
| ACS772LCB-100U-PFF-T | 100 A | 40 mV/A | 40 to 150 C | Unidirectional |
| ACS772LCB-100B-PFF-T | 100 A | 20 mV/A | 40 to 150 C | Bidirectional |
| ACS772KCB-150U-PFF-T | 150 A | 26.66 mV/A | 40 to 125 C | Unidirectional |
| ACS772KCB-150B-PFF-T | 150 A | 13.33 mV/A | 40 to 125 C | Bidirectional |
| ACS772ECB-200U-PFF-T | 200 A | 20 mV/A | 40 to 85 C | Unidirectional |
| ACS772ECB-200B-PFF-T | 200 A | 10 mV/A | 40 to 85 C | Bidirectional |
| ACS772ECB-250U-PFF-T | 250 A | 16 mV/A | 40 to 85 C | Unidirectional |
| ACS772ECB-250B-PFF-T | 250 A | 8 mV/A | 40 to 85 C | Bidirectional |
| ACS772ECB-300B-PFF-T | 300 A | 6.66 mV/A | 40 to 85 C | Bidirectional |
| ACS772ECB-400U-PSF-T | 400 A | 10 mV/A | 40 to 85 C | Unidirectional |
| ACS772ECB-400B-PFF-T | 400 A | 5 mV/A | 40 to 85 C | Bidirectional |
| Characteristic | Symbol | Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5 | 5.5 | V | |
| Supply Current | ICC | VCC = 5 V, no load on output | 10 | 15 | mA | |
| Power-On Delay | tPOD | TA = 25C | 64 | s | ||
| Response Time | tRESPONSE | TA = 25C, CL = 0.47 nF | 2.5 | s | ||
| Internal Bandwidth | BWi | Small signal 3 dB, CL = 0.47 nF | 200 | kHz | ||
| Primary Conductor Resistance | RPRIMARY | TA = 25C | 100 | |||
| Dielectric Strength Test Voltage | VISO | Agency type-tested for 60 seconds per UL standard 62368-1, 2nd Edition. Tested at 4320 VRMS for 1 second in production. | 4800 | VRMS | ||
| Dielectric Surge Strength Test Voltage | VSURGE | Tested 5 pulses at 2/minute in compliance to IEC 61000-4-5 1.2 s (rise) / 50 s (width) | 8000 | V | ||
| Working Voltage for Basic Isolation | VWVBI | For basic (single) isolation per UL standard 62368-1, 2nd Edition | 1358 VPK or VDC / 960 VRMS | V | ||
| Working Voltage for Reinforced Isolation | VWFRI | For reinforced (double) isolation per UL standard 62368-1, 2nd Edition | 672 VPK or VDC / 475 VRMS | V | ||
| Clearance | Dcl | Minimum distance through air from IP leads to signal leads | 6.8 | mm | ||
| Creepage | Dcr | Minimum distance along package body from IP leads to signal leads | 6.8 | mm | ||
| Distance Through Insulation | DTI | Minimum internal distance through insulation | 0.47 | mm | ||
| Comparative Tracking Index | CTI | Material Group II | 400 to 599 | V | ||
| Package Thermal Resistance | RJA | Mounted on the Allegro evaluation board with 2800 mm2 (1400 mm2 on component side and 1400 mm2 on opposite side) of 4 oz. copper connected to the primary leadframe and with thermal vias connecting the copper layers. Performance is based on current flowing through the primary leadframe and includes the power consumed by the PCB. | 7 | C/W |
2401220954_ALLEGRO-ACS772LCB-100B-SMT-T_C19762006.pdf
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