ACS758
1 / 22ページ

ACS758xCB Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor FEATURES AND BENEFITS • Industry-leading noise performance through proprietary amplifier and filter design techniques • Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high voltage applications • Total output error improvement through gain and offset trim over temperature • Small package size, with easy mounting capability • Monolithic Hall IC for high reliability • Ultra-low power loss: 100 µΩ internal conductor resistance • Galvanic isolation allows use in economical, high-side current sensing in high voltage systems • AEC Q-100 qualified Continued on the next page… pe d Ty ste te TÜV America Certificate Number: U8V 14 05 54214 028 UL Certified File No.: E316429 The Allegro™ ACS758 family of current sensor ICs provides economical and precise solutions for AC or DC current sensing. Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection. The device consists of a precision, low-offset linear Hall circuit with a copper conduction path located near the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional output voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory. High level immunity to current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology, provides low output voltage ripple and low offset drift in high-side, high voltage applications. The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sampling. The internal resistance of this conductive path is 100 µΩ typical, providing low power loss. The thickness of the copper conductor allows survival of the device at high overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads PFF Leadform Continued on the next page… Application 1: The ACS758 outputs an analog signal, VOUT , that varies linearly with the uni- or bi-directional AC or DC primary sampled current, IP , within the range specified. CF is for optimal noise management, with values that depend on the applicat

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor FEATURES AND BENEFITS (CONTINUED) • • • • • • • 3.0 to 5.5 V, single supply operation 120 kHz typical bandwidth 3 µs output rise time in response to step input current Output voltage proportional to AC or DC currents Factory-trimmed for accuracy Extremely stable output offset voltage Nearly zero magnetic hysteresis DESCRIPTION (CONTINUED) (pins 1 through 3). This allows the ACS758 family of sensor ICs to be used in applications requiring electrical isolation without the use of...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor SPECIFICATIONS Absolute Maximum Ratings Characteristic Reverse Supply Voltage Forward Output Voltage Forward Supply Voltage Reverse Output Voltage Output Source Current Output Sink Current Maximum Junction Storage Temperature Nominal Operating Ambient Temperature Isolation Characteristics Characteristic Dielectric Strength Test Voltage* Agency type-tested for 60 seconds per UL standard 60950-1, 2nd Edition Working Voltage for Basic Isolation For basic (single) isolation per UL...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor Thermal Characteristics may require derating at maximum conditions Characteristic Test Conditions* Mounted on the Allegro evaluation board with 2800 mm2 (1400 mm2 on component side and 1400 mm2 on opposite side) of 4 oz. copper connected to the primary leadframe and with thermal vias connecting the copper layers. Performance is based on current flowing through the primary leadframe and includes the power consumed by the PCB. TA = 25°C, 1s duration, 1% duty cycle TA = 85°C, 1s...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor Dynamic Offset Cancellation Gain Temperature Coefficient Offset Temperature Coefficient Functional Block Diagram Terminal List Table Pin-out Diagram Device power supply terminal Signal ground terminal Terminal for current being sampled Terminal for current being sampled Analog output signal Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor COMMON OPERATING CHARACTERISTICS1 valid at TOP = –40°C to 150°C and VCC = 5 V, unless otherwise specified Characteristic Supply Voltage2 Test Conditions Supply Current Output open Power-On Delay Rise Time3 Propagation Delay Time3 Response Time Internal Output Load Resistance Output Load Capacitance Primary Conductor Resistance Symmetry3 Quiescent Output Voltage5 Ratiometry3 IP step = 60% of IP+, 10% to 90% rise time, TA = 25°C, COUT = 0.47 nF TA = 25°C, COUT = 0.47 nF RPRIMARY ESYM...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 100 µΩ Current Conductor X050B PERFORMANCE CHARACTERISTICS1: TOP = –40°C to 150°C, VCC = 5 V, unless otherwise specified Characteristic Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 150°C Sens(TOP)LT Full scale of IP applied for 5 ms,TOP = –40°C to 25°C Up to full scale of IP , IP applied for 5 ms Primary Sampled Current ELIN VOE(TA) Electrical Offset Voltage3 Magnetic Offset Error Total Output Error4 Test Conditions IP Full scale of IP applied for 5 ms, TA = 25°C Over full scale of IP , IP...