IR3720
IR3720 is Power Monitor IC manufactured by International Rectifier.
DATA SHEET
Power Monitor IC with Digital I2C Interface
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Features
- Accurate True Power™ monitor
- Minimizes dynamic errors
- Reports voltage, current, or power
- Digital interface
- SMBus and I2C patible
- Programmable averaging interval
- Flexible current sensing
- Resistive or Inductor DCR
- Applications
- Synchronous rectified buck converters
- Multiphase converters
- 10pin 3x3 DFN lead free package
- Ro HS pliant
DESCRIPTION
The IR3720 measures the output voltage and inductor current of low-voltage DC-to-DC converters and reports the average power over a user specified time interval as a digital word on the I2C. The output current is measured across a current sensing resistor or indirectly across the inductor’s DCR winding resistance. Additionally, the current measurement method is also applicable to multiphase converters. The real time voltage and current signals are multiplied, digitized, and averaged over a user selectable averaging interval providing Patent Pending True Power™ measurement of highly dynamic loads.
TYPICAL APPLICATION CIRCUIT
Phase Single Phase Converter DCR L Rcs1 Rcs2 CCS1 CCS2
Output Capacitors
3.3V
LOAD
VO VDD
VCS GND
To system Controller
I2C Bus VREF
2 RT
Power...
