參數(shù)資料
型號: IR21771SPBF
廠商: International Rectifier
英文描述: Phase Current Sensor IC for AC motor control
中文描述: 相電流傳感器IC交流電機控制
文件頁數(shù): 1/16頁
文件大?。?/td> 441K
代理商: IR21771SPBF
1
www.irf.com
IR22771S/IR21771S
(PbF)
Phase Current Sensor IC for AC motor control
Features
Floating channel up to 600V for IR21771 and 1200V for
IR22771
Synchronous sampling measurement system
High PWM noise (ripple) rejection capability
Digital PWM output
Fast Over Current detection
Suitable for bootstrap power supplies
Low sensing latency (<7.5
μ
sec @20kHz)
Description
IR21771/IR22771 is a high voltage, high speed, single phase
current sensor interface for AC motor drive applications. The
current is sensed by an external shunt resistor. The IC converts the
analog voltage into a time interval through a precise circuit that also
performs a very good ripple rejection showing small group delay.
The time interval is level shifted and given to the output. The max
throughput is 40 ksample/sec suitable for up to 20 kHz
asymmetrical PWM modulation and max delay is <7.5
μ
sec
(@20kHz). Also a fast over current signal is provided for IGBT
protection.
Product Summary
V
OFFSET
(max)
V
in
range
Bootstrap supply range
Floating channel quiescent
current (max)
Sensing latency (max)
IR22771
IR21771
1200 V
600V
±250mV
8-20 V
2.2 mA
7.5 μsec
(@20kHz)
40ksample/sec
(@20kHz)
±470 mV
Throughput
Over Current threshold (max)
Package
Typical Connection
(Please refer to
Lead Assignments
for correct pin
configuration. This
diagram shows
electrical
connections only)
Data Sheet No. PD60234
revB
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