集成式霍尔电流传感器芯片CH704(ACS758/ACS770/ACS772的国产替代芯片）.pdf
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CH704
Released - Revised Oct 2021
Page 1/16
CH704
AEC-Q100 Qualified, 200A Hall Current Sensor IC with 4800V
RMS
Reinforced Isolation
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status.
Features
Package
• Reinforced isolation: 4800V
RMS
• 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 us
• Wide temperature range: -40
o
C to 150
o
C
• High resolution offset and sensitivity trimming with EEPROM
• Primary conductor resistance: 0.1 mΩ
• Integrated protections
o Under-voltage protection
o Output voltage clamp provides short circuit diagnostic
o 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 supply voltage
• Immunity to external magnetic field
Application
• UPS current sensing
• DC-to-DC converter control
• Balance bike motor control
• Overcurrent fault detection
Functional Block Diagram
5-PIN CFF
Dynamic offset
Cansellation
Signal Remodulation
Low Pass
filter
Amp
`
EEPROM
And control logic
Sensitivity Polarity
Offset Trim
Offset TC Trim
VCC
GND
VOUT
Sensitivity and
Senstivity TC Trim
Driver
IP-
IP+
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