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IR3721 Datasheet(PDF) 1 Page - International Rectifier |
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IR3721 Datasheet(HTML) 1 Page - International Rectifier |
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1 / 16 page  IR3721 DATA SHEET Page 1 of 16 www.irf.com 09/15/08 Power Monitor IC with Analog Output FEATURES Accurate TruePower TM monitor • 2.5% static accuracy • Minimizes dynamic errors Minimizes power dissipation • 5mV - 150mV 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 RoHS compliant 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 TruePower TM technology to accurately capture highly dynamic power waveforms typical of microprocessor loads. TYPICAL APPLICATION CIRCUIT ORDERING INFORMATION Device Package Order Quantity IR3721MTRPBF 10 lead DFN (3x3 mm body) 3000 piece reel * IR3721MPBF 10 lead DFN (3x3 mm body) 121 piece tube * Samples only |
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Similar Description - IR3721 |
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