Overview
The Allegro™ ACS770LCB-100B-PFF-T is a high-precision linear current sensor IC from Allegro MicroSystems, designed for economical and accurate AC or DC current sensing. This device utilizes a Hall effect principle to measure current and is part of the ACS770 family, which offers a range of solutions for various current sensing applications.
The ACS770LCB-100B-PFF-T features a precision, low-offset linear Hall circuit with a copper conduction path, providing a proportional voltage output that is calibrated for accuracy at the factory. The device is known for its high bandwidth operation, low power loss, and excellent temperature stability, making it suitable for a variety of industrial and automotive applications.
Key Specifications
| Characteristic | Symbol | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5.0 | 5.5 | V |
| Supply Current | ICC | - | 10 | 15 | mA |
| Internal Conductor Resistance | - | - | 100 | - | μΩ |
| Bandwidth | - | - | 120 kHz | - | - |
| Output Rise Time | - | - | 4.1 µs | - | - |
| Operating Temperature Range | - | -40°C to 150°C | - | - | - |
Key Features
- High-Precision Current Sensing: Utilizes a Hall effect principle with a copper conduction path for accurate AC or DC current measurement.
- Low Power Loss: Features an internal conductor resistance of 100 μΩ, minimizing power loss.
- High Bandwidth and Fast Response: Offers a typical bandwidth of 120 kHz and an output rise time of 4.1 µs.
- Integrated Shield Technology: Reduces capacitive coupling and prevents offset drift in high-side, high-voltage applications.
- Digital Temperature Compensation: Enhances accuracy and temperature stability without affecting high bandwidth operation.
- Galvanic Isolation: Allows for use in high-voltage systems without the need for opto-isolators or other costly isolation techniques.
- Single Supply Operation: Operates on a single supply voltage of 4.5 to 5.5 V.
- Lead-Free and Automotive Qualified: The device is lead (Pb) free, with all leads plated with 100% matte tin, and is AEC-Q100 automotive qualified.
Applications
- Motor Control: Ideal for motor control systems requiring precise current sensing.
- Load Detection and Management: Useful in load detection and management systems to monitor and control current flow.
- Power Supply and DC-to-DC Converter Control: Suitable for power supply and DC-to-DC converter control applications.
- Inverter Control: Can be used in inverter control systems to monitor and regulate current.
- Overcurrent Fault Detection: Effective in detecting overcurrent faults in various electrical systems.
- Automotive Systems: AEC-Q100 qualified, making it suitable for automotive applications such as hybrid electric vehicles (HEVs).
Q & A
- What is the operating temperature range of the ACS770LCB-100B-PFF-T?
The operating temperature range is from -40°C to 150°C.
- What is the typical bandwidth of the ACS770LCB-100B-PFF-T?
The typical bandwidth is 120 kHz.
- How does the ACS770LCB-100B-PFF-T achieve high accuracy?
The device achieves high accuracy through digital temperature compensation and factory calibration.
- What is the internal conductor resistance of the ACS770LCB-100B-PFF-T?
The internal conductor resistance is 100 μΩ.
- Is the ACS770LCB-100B-PFF-T lead-free?
Yes, the device is lead (Pb) free with all leads plated with 100% matte tin.
- What are the typical applications of the ACS770LCB-100B-PFF-T?
Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection.
- Does the ACS770LCB-100B-PFF-T require external isolation techniques?
No, the device provides galvanic isolation, eliminating the need for opto-isolators or other costly isolation techniques.
- What is the supply voltage range for the ACS770LCB-100B-PFF-T?
The supply voltage range is from 4.5 to 5.5 V.
- Is the ACS770LCB-100B-PFF-T automotive qualified?
Yes, the device is AEC-Q100 automotive qualified.
- What is the output rise time of the ACS770LCB-100B-PFF-T in response to a step input current?
The output rise time is 4.1 µs.
