CZ375 Series 

100Arms compliant
Supports ± 115Apeak ~ ±225Apeak
Ultra-high accuracy
Creepage and clearance 8mm or more
Coreless current sensor IC

"Currentier" Current Sensor ICs

Current Sensors

Overview

The CZ375 Series is an ultra-high accuracy coreless current sensor IC of low heat generation that meets UL61800-5-1 of insulating standards in the industrial equipment market with both creepage distance and clearance of 8mm or more.

With the same packaging as the CZ370 Series, the CZ375 Series supports 100Arms, a much higher current.

Suitable for large-current sensing and inverter-control of large-capacity models in various applications such as EV quick-charging stations and packaged air conditioners.

This IC can also contribute to solving customers' problems such as suppressing heat generation, improving system efficiency, and downsizing the system by increasing the switching frequency speed.

Features

The development of our original package realizes a low resistance of 0.27mΩ in primary conductor resistance. As a result, compared with shunt resistors and similar products from other manufacturers, heat generation can be significantly suppressed during the application of current, realizing 100Arms continual energization. In addition, it can detect a wide range of current up to ±225Apeak. The new CZ375 Series enables customers using the conventional CZ370 Series (±180Apeak) to expand the application to larger models with higher current ratings. In addition, the pattern layout can be used as it is since it uses the same packaging as that of CZ370 Series.

Our original packaging design allows both the creepage distance and the space distance to be more than 8mm. The Working Voltage exceeds 550Vrms and can be used with 400V reinforced isolation.

Ultra-high precision current sensor IC with overall accuracy of ± 0.4% F.S (Ta = 0 to 90 ºC Typ, comparable to closed current sensors. It has the same high accuracy as that of the CZ370 Series.

The high-sensitivity ASIC of AKM compound Hall elements has enabled the high-speed response of 0.5μs.

CZ375 Series CZ375 Series

Specifications

Series   CZ375 Series
Current sensor type   Coreless Current Sensor IC :
Currentier
Package size [mm] 12.7 x 10.9 x 2.25
Package Type (Mounting style)   (Small-sized)
surface mount package (SMD)
Power Supply Voltage [V] 5.0
(4.5 to 5.5)
Operating Temperature [℃] -40 to 105
Maximum Primary
Current
[Arms] 100
Working Voltage 
(pollution degree=2)
[Vrms] 558
(reinforced insulation)
Creepage / Clearance
Distance (min.)
[mm] 8.0
Primary conductor
resistance (Typ.)
[mΩ] 0.27
Isolation Voltage [kVrms] 4.2(AC50Hz, 60s)
VREF Pin   Existence
Disturbance magnetic field
fluctuation suppression  function
  Existence
Overcurrent
detection function
  Non-existence
Ratiometric /
Non-Ratiometric
  Ratiometric
Safety Standards   IEC/UL61800-5-1 certified
IEC/UL62368-1 certified
UL1577 certified
Pb Free   Yes
Halogen Free   Yes
MSL   MSL2a
JEDEC Standard Packaging   Compliant
Packaging   TAPE
Minimum Order Quantity [pcs.] 1000
Part Status   MP
Block Diagram CZ375 Series Block Diagram

Lineup

Product 
Name
Linear 
Sensing 
Range
Sensitivity
Temperature 
Drift of 
Sensitivity *1
Temperature 
Drift of 
Zero-Current
Output *1
Total
Accuracy *2
Response
time
Bipolar /
Unipolar
Datasheet 
Download
(PDF)
[A] [mV/A] [%] [mV] [%F.S.] [μs]
CZ375A ±115 19.5 ±0.9 ±2.8

0.5
(Typ.)

-0.9~-0.7
(Min. Max.)

0.5 Bipolar CZ375A DS
CZ375B ±150 15.0 ±2.8 CZ375B DS
CZ375C ±188 12.0 ±2.7 CZ375C DS
CZ375D ±225 10.0 ±2.7 CZ375D DS

[Notes]

*1 It is defined as the "average value ± 3σ" of the actual measurement result (Ta = 0 to 90 °C) in a certain lot.
*2 The typical value is defined as the “average value ± 1σ” of the actual measurement result (Ta = 0 to 90 °C) in a certain lot.
In the same manner, the minimum and maximum values are defined as the “average value ± 3σ” of the actual measurement result (Ta = 0 to 90 °C) in a certain lot.

Applications

  • EV quick charge station
  • Packaged air conditioner
  • General-purpose inverter
  • Inverter
  • UPS

It is suitable for the application which requires insulation and achieve small size with low heat generation.

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* Pollution Degree II with reinforced insulation

Current 
Sensor 
Type
Package Supply
Voltage
Output
Voltage
Effective
Current
Measurement
Range
Bipolar /
Unipolar
Ratiometric/
Non-Ratiometric
Creepage
Clearance
Working
Voltage *
Product 
Name
Product
Series
Part
Status
(V) (V) (Arms) (Apeak) (mm) (Vrms)
Coreless SOP 5.0 5.0 100 ± 115 to ± 225 Bipolar Retiometric ≧ 8.0 1118 CZ375x CZ375 Series MP
60 ± 5.3 to ± 180
CZ370x CZ370 Series
CZ372 Series
MP
0 to 345.2 Unipolar CZ372x 
3.0 50 ± 11.6 to ± 166.6 Bipolar Non-Ratiometric CZ3AGx CZ3A Series MP
3.3 3.3 ± 12.9 to ± 129.1 CZ3A0x