سنسور و مبدل سنسور جریان

Product Attributes

Introduction

The ACS732 and ACS733 are next-generation, high-bandwidth current sensor ICs that provide a compact, fast, and accurate solution for measuring high-frequency currents in DC-DC converters and other switching power supply applications. These devices offer high-isolation, high-bandwidth current sensing based on the Hall effect, with user-configurable overcurrent fault detection. These features make them ideal replacements for high-frequency transformers and current transformers in applications operating at high voltages. The devices are suitable for all markets, including automotive, industrial, commercial, and communications systems. They can be used in motor control, load sensing and management, switch-mode power supplies, and overcurrent fault protection applications. Implementation is facilitated by the wide-body SOIC-16 package. The applied current flowing through the copper conductive path generates a magnetic field, which is sensed by the IC and converted into a proportional voltage. Current is sensed differentially to suppress external common-mode magnetic fields. Device accuracy is optimized through close proximity of the magnetic field to the Hall transducer. The Hall IC provides a precise proportional voltage that is factory-programmed after packaging for high accuracy. The fully integrated package features an internal copper conductive path with a typical resistance of 1 mΩ, enabling low power dissipation. The current-carrying pins (pins 1 through 8) are electrically isolated from the sensor pins (pins 9 through 16). This allows the device to be used in high-side current sensing applications without the need for high-side differential amplifiers or other costly isolation techniques. The ACS732/ACS733 outputs an analog signal V_OUT that varies proportionally to the bidirectional AC or DC primary sensed current I_P within the specified measurement range. The overcurrent threshold can be set via a voltage divider resistor connected to the V_OC pin. The ACS732 and ACS733 are housed in a small, thin, surface-mount SOIC-16 wide-body package. The lead frame is plated with 100% matte tin, compatible with standard lead-free PCB assembly processes. The device is internally lead-free and fully calibrated before shipment.

Features

• AEC-Q100 automotive-grade certified
• High bandwidth, 1 MHz analog output
• Differential Hall sensing rejects common-mode magnetic fields
• High-isolation SOIC-16 wide-body package provides current isolation for high-voltage applications
• Integrated shield virtually eliminates capacitive coupling from current conductor to die, greatly suppressing output noise caused by high dV/dt transients
• Industry-leading noise performance and significantly improved bandwidth achieved through proprietary amplifier and filter design
• UL60950-1 (Edition 2) certified
• Dielectric withstand voltage = 3.6 kV_RMS
• Basic isolation working voltage = 616 V_RMS
• Fast and externally configurable overcurrent fault detection
• 1 mΩ primary conductor resistance for low power loss and high surge current capability
• Supports 3.3 V and 5 V single-supply options
• Output voltage proportional to AC and DC currents
• Factory-trimmed sensitivity and quiescent output voltage for improved accuracy
• Near-zero magnetic hysteresis
• Output voltage ratiometric to supply voltage