Introduction to Current Sensor ABF025

Overview of Current Sensor ABF025

 

ABF025 is a current sensor made by Melexis Technologies NV. This sensor handles up to 25A and features a single channel with Hall effect technology, and it’s bidirectional. It comes in a 16-SOIC package that's 0.295" or 7.50mm wide. The ABF025 detects current through the lead frame of its package, which helps cut down on thermal losses compared to other options. It boasts a compact design, low impedance, high bandwidth, and good isolation. Additionally, it has a quick response time of 2μs and covers a bandwidth from DC to 300kHz.

Features of Current Sensor ABF025 

 

• Glass passivated die construction 
• Low forward voltage drop 
• High current capability
• High surge current capability
• Designed for surface mount application 
• Plastic material-UL flammability94V-0

 

Mechanical Data of Current Sensor ABF025 

 

• Case:sOPA-4, molded plastic ABF.
• Terminals: plated leads solderable per MIL-STD-202,Method 208
• Polarity: as marked on case.
• Mounting position: Any
• Marking: type number

 

Maximum Ratings and Electrical Characteristics are specified at a 25℃ ambient temperature unless stated otherwise. For a single-phase, half-wave, 60Hz, resistive or inductive load, the ratings apply. If dealing with a capacitive load, reduce the current rating by 20%.

 

TYPE NUMBER	SYMBOL	ABF2U	ABF4U	ABF6U	ABF8U	ABF10U	UNITS
Peak Repetitive Reverse Voltage Working Peak Reverse VoltageDC Blocking Voltage	VRRM,VRWM,VDc,	200	400	600	800	1,000	v
RMS Reverse Voltage	VRMS	140	280	420	560	700	v
Average Rectified Output Current @TA=30'C	lo	1.0	1.0	1.0	1.0	1.0	A
Non-Repetitive Peak Forward Surge Current 8.3msSingle half sine-wave superimposed on rated load(JEDEC Method)	IFSM	35	35	35	35	35	A
Forward Voltage per element@IF=1.0A	VEM	1.1	1.1	1.1	1.1	1.1	v
Peak Reverse Current @TA =25 ℃  At Rated DC Blocking Voltage @TA=125 ℃	IR	5.5  500	5.5  500	5.5  500	5.5  500	5.5  500	uA
Typical Thermal Resistance per leg (Note 1)	ReJA,RaL	62.5 25	62.5 25	62.5 25	62.5 25	62.5 25	CI
Operating and Storage Temperature Range	TJ.TSTG	-55to+150	-55to+150	-55to+150	-55to+150	-55to+150	℃

 

Warnings

 

Keep out of reach of children. If swallowed, seek medical attention immediately and have the doctor call 800-498-8666.

 

Do not install the battery backwards, charge it, expose it to fire, or mix it with used or different types of batteries, as this may cause the battery to explode or leak, resulting in injury. Replace all batteries at the same time.

 

Shipping Weight: 0.02 lbs

 

Product Dimensions (LxWxH): 0.25 x 1.74 x 3.5 inches

 

Note: This product is not eligible for Ship to Store at this time.

 

Overview of Current sensors

 

Current sensors come in two types: open-loop and closed-loop. Open-loop sensors measure both AC and DC currents while providing electrical isolation between the measured circuit and the sensor's output. This means the primary current is measured without direct electrical contact with the primary circuit, ensuring galvanic isolation. Typically less expensive than closed-loop sensors, open-loop sensors are favored for battery-powered circuits due to their low power consumption and compact size.

 

Closed-loop sensors, on the other hand, also measure AC and DC currents and provide electrical isolation. They are known for their fast response, high linearity, and low temperature drift. The output current of a closed-loop sensor is relatively resistant to electrical noise. These sensors are sometimes referred to as ‘Zero-Flux’ sensors because the Hall-Effect sensor generates an opposing current in a secondary coil wound on the magnetic core, which nullifies the flux created by the primary current. Closed-loop sensors are often preferred when high accuracy is crucial.

 

Construction of Current sensors

 

Open-loop current sensors feature a Hall sensor positioned in the air gap of a magnetic core (see Fig. 1). A conductor generates a magnetic field proportional to the current it carries. This magnetic field is focused by the core and detected by the Hall sensor. Since the signal from the Hall generator is weak, it is amplified before being output by the sensor. Open-loop sensors typically include circuitry for temperature compensation and provide a calibrated high-level voltage output. Although they are generally more cost-effective than closed-loop sensors, they can be susceptible to saturation and temperature drift. However, temperature drift can be partially mitigated by incorporating a positive coefficient into the control current to counteract changes in sensitivity with temperature.

 

FAQ

 

What is the maximum current rating for the ABF025?

 

The ABF025 has a maximum current rating of 25A.

 

Can the ABF025 measure both AC and DC currents?

 

Yes, the ABF025 can measure both AC and DC currents.

 

What type of package does the ABF025 come in, and what are its dimensions?

 

The ABF025 comes in a 16-SOIC package with a width of 0.295" (7.50mm).

 

How does the ABF025 achieve electrical isolation from the primary circuit?

 

The ABF025 achieves electrical isolation by measuring the primary current through the lead frame of its package without making direct electrical contact with the primary circuit, thus providing galvanic isolation.

 

What is the response time of the ABF025?

 

The response time of the ABF025 is 2μs.

 

What is the bandwidth range of the ABF025 sensor?

 

The ABF025 sensor has a bandwidth range from DC to 300kHz.

 

What are the advantages of using the ABF025 compared to other current sensors?

 

The ABF025 offers advantages such as a compact footprint, low impedance, high bandwidth, and effective isolation. It also helps to reduce thermal losses compared to some other solutions.

 

How does the ABF025 help in reducing thermal losses?

 

The ABF025 reduces thermal losses by measuring the current through the lead frame of its package, which minimizes heat generation compared to other current measurement solutions.

 

Is the ABF025 suitable for battery-powered applications?

 

Yes, the ABF025 is well-suited for battery-powered applications due to its low power consumption and compact design.

 

What are the key design features of the ABF025 that contribute to its performance?

 

Key design features of the ABF025 include its Hall effect sensing technology, compact 16-SOIC package, low impedance, high bandwidth, and its ability to provide galvanic isolation.

 

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