ALLEGRO CT431-HSWF30MR

The CT431 is a high bandwidth and ultra-low noise integrated contact current sensor that uses Allegro patented XtremeSense™ TMR technology to enable high accuracy current measurements for many industrial, consumer, and automotive applications. The device supports nine current ranges where the integrated current carrying conductor (CCC) will handle up to 65 A of current and generates a current measurement as a linear analog output voltage. The device achieves a total output error of less than ±1.0% full-scale (FS) over voltage and the full temperature range. The device has a ~300 ns output response time while the current consumption is ~6.0 mA and is immune to common mode fields. The CT431 has an integrated overcurrent detection (OCD) circuitry to identify out of range currents (OCD) with the result output to the fault-bar (FLT) pin. The FLT is an open drain, active low digital signal that is activated by the CT431 to alert the microcontroller that a fault condition has occurred. The CT431 is offered in an industry-standard 16-lead SOIC wide package that is green and RoHS compliant.

• Integrated contact current sensing for low to medium current ranges: 0 to 20 A, ±30 A, ±50 A, ±20 A, ±40 A, 0 to 65 A, 0 to 30 A, 0 to 50 A, ±65 A
• Integrated current carrying conductor (CCC)
• Linear analog output voltage
• Total error output ≤±1.0% FS, -40℃ to 125℃
• 1 MHz bandwidth
• Response time: ~300 ns
• UL/IEC 62368-1 and UL1577 certification
• Rated isolation voltage: 5 kVRMS
• Working voltage for basic isolation: 1100 VRMS
• Working voltage for reinforced isolation: 550 VRMS
• Low noise: 9.5 to 19.0 mARMS (ω fBW = 100 kHz)
• Reference voltage output
• Immunity to common mode fields: -54 dB
• Supply voltage: 3.0 to 3.6 V
• Overcurrent detection
• Out of range currents
• AEC-Q100 grade 1

• Solar/power inverters
• Motor control
• UPS, SMPS, and telecom
• White goods power supplies
• Power utility meter
• Battery management
• Overcurrent fault systems protection