CH704 AEC-Q100 Qualified, 200A Hall Current Sensor IC with 4800VRMS Reinforced Isolation
The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. A precise, proportional voltage is provided by the low-offset, chopper-stabilized Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope when an increasing current flows through the primary copper conduction path, which is the path used for current sensing.
The terminals of the conductive path are electrically isolated from the sensor leads. This allows the CH704 current sensor IC which launched by Cosemitech to be used in high-side current sense applications without the use of high-side differential amplifiers or other costly isolation techniques.
The lead frame is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory.
Fig.1 Functional Block Diagram
Features
• Reinforced isolation: 4800VRMS
• AEC-Q100 qualified (CH704A)
• Single supply: 4.5-5.5V
• Output voltage proportional to AC current:+/-50A,+/-100A,+/-150A,+/-200A
• Bandwidth: 120 kHz
• Response time: 4 μs
• Wide temperature range: -40°C to 150°C
• High resolution offset and sensitivity trimming with EEPROM
• Primary conductor resistance: 0.1 mΩ
• Integrated protections
Under-voltage protection
Output voltage-clamp provides short circuit diagnostic
Output spiking suppress during fast current step inputs
• Factory programmed sensitivity and quiescent output voltage TC
• Integrated digital temperature compensation circuitry
• Nearly zero magnetic hysteresis
• Ratio-metric output from the supply voltage
• Immunity to the external magnetic field
Electrical Characteristics
Common operating characteristics: Valid through the full range of TA, VCC=5V, CBYP=0.1μF, unless otherwise specified.
Table.1
Application
• UPS current sensing
• DC-to-DC converter control
• Balance bike motor control
• Overcurrent fault detection
Product Family Members
Table.2
Package Information
Fig. 2 Package CB, 5-pin Lead form CFF
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