AK31 Series
Ultra-low Noise
Ultra-low Impedance
Small-sized
Coreless Current Sensor ICs
AK3101, AK3102, AK3103, AK3104, AK310H
AKM has developed ultra-low noise coreless sensors, the AK31 series, for large sized speakers such as subwoofers.
This is suitable for a system with voice coil current feedback with control of voice coil current, (Motion Feedback).
The AK31 series supports UL standards which works well with controlling industrial motors.
Applications
- Current detection of audio speakers (Motional Feedback)
- Motor drivers
- General Inverter (Drives)
- UPS's
- Power conditioner (DC side)
It is suitable for the application which requires insulation and detection of very small current.
Features
Ultra-Low Noise
Previously, current sensors had large sensor noise problems. The AK31 reduces the noise with signal processing using an ultra-high sensitivity compound Hall element and LSI.
It achieves the world’s best noise performance of -108dBm/√Hz.*
Ultra-Low Impedance
Dumping factor for the AK31 is almost unaffected since it is capable of current detection with a 1.6mΩ impedance.
It is suitable for current detection within speakers such as in a Motion Feedback system.
Small package, Supporting Safety Standard
The AK31 adopts an small coreless package（D/W/H:7.6mm×7.9mm×1.15mm).
It is certified according to IEC/UL60950, IEC/UL62368 and IEC/UL1577, suitable for various industrial applications such as AC motors and general inverters.
Certified with safety standards
Related Contents
Selection Table
| Supply Voltage (V) |
Output Voltage (V) |
Effective Current (Arms) |
Measurement Range (Apeak) |
Bipolar / Unipolar |
Creepage Clearance (mm) |
Working Voltage * (V) |
Product Name | Product Series |
|---|---|---|---|---|---|---|---|---|
| 5.0 | 5.0 | 60 | ± 5.3 to ± 180 |
Bipolar | ≧ 8 | 800 | CZ370x | CZ37 Series |
| 0 to 345.2 | Unipolar | CZ372x | ||||||
| 3.0 | 50 | ± 11.6 to ± 166.6 | Bipolar | CZ3AGx | CZ3A Series | |||
| 3.3 | 3.3 | ± 12.9 to ± 129.1 | CZ3A0x | |||||
| 5.0 | 5.0 | 40 | ± 33 to ± 60 | ≧ 7.2 | 715 | CZ381x | CZ38 Series | |
| 5.0 | 5.0 | 20 | ± 4.5 to ± 42 | Bipolar Unipolar |
≧ 5 | 500 | CQ330x | CQ3 Series |
| 3.3 | 3.3 | ± 8.5 to ± 44 | CQ320x | |||||
| 5.0 | 5.0 | ± 10.7 to ± 42 | AK310x | AK31 Series |
* Pollution Degree II with reinforced insulation
