WCS1702 Hall Effect Base Linear Current Sensor Features: Low noise analog signal path 0.24 Ω internal conductor resistance Output voltage proportional to AC and DC current Min. sensing current 2.0A at 5V voltage supply High Sensitivity 1 mV/mA Wide operating voltage range 3.0~12 V. Low operating current 3mA Nearly zero magnetic hysteresis. Ratiometric output from supply voltage 10K Hz bandwidth Functional Description : The Winson WCS1702 provides economical and precise solution for both DC and AC current sensing in industrial, commercial and communications systems. The unique package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, over-current fault detection and any intelligent power management system etc… The WCS1702 consists of a precise, low-temperature drift linear hall sensor IC with temperature compensation circuit and a current transformer with 0.24 Ω typical internal conductor resistance. This extremely low resistance can effectively reduce power loss, operating temperature and increase the reliability greatly. Applied current flowing through this conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. The terminals of the conductive path are electrically isolated from the sensor leads. This allow the WCS1702 current sensor to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques and make system more competitive in cost. Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2009/9/7 WCS1702 Function Block: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2009/9/7 WCS1702 Electrical Characteristics: (T=+25˚C, Vdd=5.0V ) Characteristic Min Typ Max Units Symbol Test Conditions Supply Voltage Vcc 3.0 ─ 12 V Supply Current Isupply IP =0 A ─ 3.5 6.0 mA Zero Current Vout Primary Conductor Resistance V0G Rprimary IP =0 A IP =2 A 2.4 ─ 2.5 0.24 2.6 ─ V Ω Sensitivity △Vout IP= ± 2.0 A 0.9 1.0 1.1 V/A Bandwidth BW － 10 － kHz － － － ±2.0 ±5.0 ±0.5 － － － A Measurable Current Range Temperature Drift MCR △Vout ─ Vdd=5V Vdd=12V Ip =0 A All output-voltage measurements are made with a voltmeter having an input impedance of at least 100kΩ Package Information: Winson reserves the right to make changes to improve reliability or manufacturability. ©Winson, 2009/9/7 mV/℃