IR3721
IR3721 is Power Monitor manufactured by International Rectifier.
DATA SHEET
Power Monitor IC with Analog Output
Features
- Accurate True Power TM monitor
- 2.5% static accuracy
- Minimizes dynamic errors
- Minimizes power dissipation
- 5m V
- 150m V full scale current range
- Versatile
- Monitors power or current
- Single buck or multiphase converters
- Inductor DCR or resistive shunt sensing
- Simple add-on to existing converters
- 10 pin 3x3 DFN lead free package
- Ro HS pliant
DESCRIPTION
The IR3721 is a versatile power or current monitor IC for low-voltage DC-DC converters. The IR3721 monitors the inductor current in buck or multiphase converters using either a current sensing resistor or the inductor’s winding resistance (DCR). The output (DI) is a pulse code modulated signal whose duty ratio is proportional to the inductor current. An analog voltage that is proportional to power is realized by connecting VK to VO and connecting an RC filter to DI.
The IR3721 uses Patent Pending True Power TM technology to accurately capture highly dynamic power waveforms typical of microprocessor loads.
TYPICAL APPLICATION CIRCUIT
ORDERING INFORMATION
Device IR3721MTRPBF
- IR3721MPBF
Package 10 lead DFN (3x3 mm body) 10 lead DFN (3x3 mm body)
- Samples only
Page 1 of 16
.irf.
Order Quantity 3000 piece reel 121 piece tube
09/15/08
DATA...
