Product Overview
The Allegro CT430 is a high-bandwidth, ultra-low noise integrated contact current sensor utilizing XtremeSense TMR technology for high-accuracy current measurements. It supports eight current ranges up to 65 A, providing a linear analog output voltage with a total output error of less than 1.0% full-scale over voltage and temperature. The device features a fast ~300 ns output response time, low current consumption (~6.0 mA), and immunity to common mode fields. Integrated overcurrent detection (OCD) circuitry alerts the microcontroller via an active-low fault (FLT) pin. The CT430 is available in an industry-standard, green, RoHS-compliant 16-lead SOIC wide package and is AEC-Q100 grade 1 qualified. It is suitable for a wide range of industrial, consumer, and automotive applications including solar/power inverters, UPS, SMPS, telecom power supplies, battery management systems, motor control, white goods, and power utility meters.
Product Attributes
- Brand: Allegro MicroSystems
- Technology: XtremeSense TMR
- Package: 16-lead SOIC wide (SOICW)
- Compliance: Green, RoHS compliant
- Certifications: UL/IEC 62368-1, UL1577, AEC-Q100 Grade 1
- Isolation Voltage Rated: 5 kVRMS
- Working Voltage (Basic Isolation): 1100 VRMS
- Working Voltage (Reinforced Isolation): 550 VRMS
Technical Specifications
| Feature | Specification | Details |
|---|---|---|
| Product Name | CT430 | XtremeSense TMR Current Sensor with Ultra-Low Noise and <1% Total Error |
| Current Carrying Conductor (CCC) Max Current | 65 A | |
| Total Output Error | < 1.0% FS | Over voltage and full temperature range (40C to 125C) |
| Output Response Time | ~300 ns | |
| Current Consumption | ~6.0 mA | |
| Bandwidth | 1 MHz | |
| Common Mode Field Rejection Ratio (CMFRR) | 54 dB | |
| Supply Voltage | 4.75 to 5.50 V | |
| Overcurrent Detection (OCD) | Integrated circuitry | Outputs to FLT pin |
| Fault Output (FLT) | Open drain, active low digital signal | Indicates fault condition (OCD, UVLO) |
| Package Dimensions | 10.21 mm 10.31 mm 2.54 mm | (for SOICW-16) |
| Operating Temperature Range | 40C to 125C | |
| Available Current Ranges (IPMAX) | 0 to 20 A | (CT430-xSWF20DR) |
| 20 A | (CT430-xSWF20MR) | |
| 0 to 30 A | (CT430-xSWF30DR) | |
| 30 A | (CT430-xSWF30MR) | |
| 0 to 50 A | (CT430-xSWF50DR) | |
| 50 A | (CT430-xSWF50MR) | |
| 0 to 65 A | (CT430-xSWF65DR) | |
| 65 A | (CT430-xSWF65MR) | |
| Sensitivity (Typical) | 200 mV/A (20 A) to 61.5 mV/A (65 A) | Varies by model |
| Linear Output Voltage Range (OUT) | 0.50 to 4.50 V | For measured current |
| Quiescent Output Voltage (VOQ) | 0.50 V (Unipolar) / 2.50 V (Bipolar) | @ IP = 0 A, TA = 25C |
| Power-On Time (tON) | 100 s | Typical |
| Rise Time (tRISE) | 200 ns | Typical |
| Propagation Delay (tDELAY) | 250 ns | Typical |
| Undervoltage Lockout (UVLO) | 2.45 V (Falling) / 2.50 V (Rising) | |
| Noise (eN) | 9.0 to 14.0 mARMS | @ fBW = 100 kHz, TA = 25C (varies by model) |
| Primary Conductor Resistance | ~0.5 m |
2504101957_ALLEGRO-CT430-HSWF30MR_C28375048.pdf
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