Allegro MicroSystemsACS70331EOLCTR-2P5B3电流传感器

The ACS70331 is Allegro’s first integrated, high sensitivity, current sensor IC for <5 A current sensing applications. It incorporates giant magneto-resistive (GMR) technology that is 25 times more sensitive than traditional Hall-effect sensors to sense the magnetic field generated by the current flowing through the low resistance, integrated primary conductor.

The analog output provides a low noise high-speed signal, which is proportional to the current flowing through the primary. The response time of the part is typically 535 ns. The ACS70331 is offered in four factory-programmed sensitivity and offset levels to optimize performance over the desired current measurement range.

The differential configuration of the GMR elements, relative to the integrated current conductor, provides significant rejection of stray magnetic fields, resulting in stable operation even in magnetically noisy environments.

The ACS70331 operates from a single 3.3 V power supply and is qualified over the full commercial temperature range of –40°C to 85°C. It is offered in a low-profile space-saving surface mount QFN and SOIC packages.

The ACS70311 has all the features of the ACS70310 with the following improvements:

• •  Eliminates the need for voltages >VCC during customer programming
• •  Adding UVD (Under Voltage Detection) on top of POR (Power-on-reset) to improve diagnostics

Applications

• •  Hybrid and Electric Vehicle Traction Motor Inverter
• •  48V Starter Generator
• •  Solar (MPPT, combiner box)
• •  Battery Junction Boxes
• •  Smart fuse
• •  Overcurrent detection
• •  DC/DC Converter

Typical Application

Features and Benefits

• •  High sensitivity current sensor IC for sensing up to 5 A (DC or AC)
• •  1 MHz bandwidth with response time <550 ns
• •  Low noise: 8 mA(rms) at 1 MHz
• •  Non-ratiometric, analog output proportional to AC and DC current
• •  Single 3.3 V supply operation
• •  High DC PSRR enables use with low accuracy power supplies or batteries (3 to 4.5 V operation)
• •  1.1 mΩ primary conductor resistance results in low power loss
• •  Small surface mount QFN-12 and SOIC-8 packages for space-constrained applications

Related Products

Allegro Part Number	Product Description	Disti Cost
ACS70311LKTATN-001B5-C	HIGHEST ACCURACY PROGRAMMABLE LINEAR HALL SENSOR	1.27
ACS70311LKTATN-2P5B5-C	HIGHEST ACCURACY PROGRAMMABLE LINEAR HALL SENSOR	1.27
ACS70311LKTATN-005B5-C	HIGHEST ACCURACY PROGRAMMABLE LINEAR HALL SENSOR	1.27
ACS70311LKTATN-010B5-C	HIGHEST ACCURACY PROGRAMMABLE LINEAR HALL SENSOR	1.27
ASEK-70311-SUBKIT-T	70311 PROGRAMMING KIT LESS ASEK-20-T-KIT TED-0003346	96.29

USER PROGRAMMING MANUAL