Advantages of AKM's Current Sensor ICs

(1) Simple structure

  Simple structure with minimum parts achieves a high reliability.

(2) Small-sized package

  Small-sized package will help customers to reduce a board space.

(3) High S/N ratio

  Semiconductor Hall element is used for the achievement of high S/N ratio.

(4) Fast Response

  The fastest response time among open-type current sensors will detect even the high-speed current of inverters.

(5) Certified with safety standards

Output Characteristics of CQ Series

CQ series output the linear voltage with respect to the detected current value.

Output will saturate if the current flows over 'linear sensing range', which is different for different product.

Products with wider linear sensing range can detect the larger current, but on the other hand their outputs per 1A become smaller.

It is reccomended to select a product which has the optimal linear current range for customers' application.

Fig. Output characteristics of CQ series (example: CQ-206x)

*Output at IN=0A is normally 1/2VDD, but it is not 1/2VDD in some products.

**Aside from the linear sensing range, maximum effective current is defined.

Please use in the condition that detected current does not exceed this value continuousuly.

Structure and Principle

CQ-1 Series

Structure and Principle

(a) Magnetic field is generated by the current flowing in the primary conductor.

(b) Magnetic core concentrates the magnetic field, and parallel magnetic field appears between the gap in the center of the core.

(c) Linear Hall ICs placed between the gap detects the parallel magnetic field, which is proportional to the current value.

(a)
(b)
(c)

Fig. Structure and current detection principle of CQ-1 series

CQ-2 Series

Structure and Principle

(a) Magnetic field is generated by the current flowing in the primary conductor.

(b) Magnetic core concentrates the magnetic field, and parallel magnetic field appears between the gap in the center of the core.

(c) Linear Hall IC placed between the gap detects the parallel magnetic field, which is proportional to the current value.

(a)
(b)
(c)

Fig. Structure and current detection principle of CQ-2 series

CQ-3 Series

Structure and Principle

Hall sensor to detect the magnetic field generated by current flowing through the primary conductor directly.

Fig. Structure and current detection principle of CQ-3 series