ALLEGRO ACS733KLATR-65AB-T

The ACS732 and ACS733 are a new generation of high bandwidth current sensor ICs. These devices provide a compact, fast, and accurate solution for measuring high- frequency currents in DC/DC converters and other switching power applications. The ACS732 and ACS733 offer high isolation, high bandwidth Hall- effect- based current sensing with user- configurable overcurrent fault detection. These features make them ideally suited for high- frequency transformer and current transformer replacement in applications running at high voltages.

The ACS732 and ACS733 are suitable for all markets, including automotive, industrial, commercial, and communications systems. They may be used in motor control, load detection and management, switch- mode power supplies, and overcurrent fault protection applications.

The wide body SOIC- 16 package allows for easy implementation. Applied current flowing through the copper conduction path generates a magnetic field that is sensed by the IC and converted to a proportional voltage. Current is sensed differentially in order to reject external common- mode fields. Device accuracy is optimized through the close proximity of the magnetic field to the Hall transducers. A precise, proportional voltage is provided by the Hall IC, which is factory- programmed after packaging for high accuracy. The fully integrated package has an internal copper conductive path with a typical resistance of 1 mΩ, providing low power loss.

The current- carrying pins (pins 1 through 8) are electrically isolated from the sensor leads (pins 9 through 16). This allows the devices to be used in high- side current sensing applications without the use of high- side differential amplifiers or other costly isolation techniques.

ACS732/ACS733 outputs an analog signal, VOUT, that changes proportionally with the bidirectional AC or DC primary sensed current, IP, within the specified measurement range.

The overcurrent threshold may be set with a resistor divider tied to the VOC pin.

The ACS732 and ACS733 are provided in a small, low profile, surface- mount SOIC- 16 wide- body package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is lead- free. These devices are fully calibrated prior to shipment.

• AEC-Q100 automotive qualified
• High bandwidth, 1 MHz analog output
• Differential Hall sensing rejects common-mode fields
• High-isolation SOIC-16 wide body package provides galvanic isolation for high-voltage applications
• Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise due to high dv/dt transients
• Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design
• UL60950-1 (ed. 2) certified
  • Dielectric Strength Voltage = 3.6 kVRMS
  • Basic Isolation Working Voltage = 616 VRMS
• Fast and externally configurable overcurrent fault detection
• 1 mΩ primary conductor resistance for low power loss and high inrush current withstand capability
• Options for 3.3 V and 5 V single supply operation
• Output voltage proportional to AC and DC current
• Factory-trimmed sensitivity and quiescent output voltage for improved accuracy
• Nearly zero magnetic hysteresis
• Ratiometric output from supply voltage

• DC/DC converters
• Other switching power applications
• High-frequency transformer and current transformer replacement in high-voltage applications
• Motor control
• Load detection and management
• Switch-mode power supplies
• Overcurrent fault protection applications