IRS20957STRPBF

Product Summary

The IRS20957STRPBF is a high voltage, high speed MOSFET driver with floating PWM input, specially designed for Class D audio amplifier applications. The bi-directional current sensing requires no external shunt resistors. The IRS20957STRPBF can capture over-current conditions at either positive or negative load current direction. A built-in control block provides secure protection sequence against over-current conditions, including a programmable reset timer. The internal deadtime generation block provides accurate gate switch timing and enables optimum deadtime settings for better audio performances, such as THD and audio noise floor.

Parametrics

IRS20957STRPBF absolute maximum ratings: (1)VB High-side floating supply voltage: -0.3 to 220V; (2)VS High-side floating supply voltage: VB-20 to VB+0.3V; (3)VHO High-side floating output voltage: Vs-0.3 to VB+0.3V; (4)VCSH CSH pin input voltage: Vs-0.3 to VB+0.3V; (5)VCC Low-side fixed supply voltage: -0.3 to 20V; (6)VLO Low-side output voltage: -0.3 to VCC +0.3V; (7)VDD Floating input supply voltage: -0.3 to 210V; (8)VSS Floating input supply voltage: (see IDDZ) VDD+0.3V; (9)VIN PWM input voltage VSS: -0.3 to VDD+0.3V; (10)VCSD CSD pin input voltage VSS: -0.3 to VDD+0.3V; (11)VDT DT pin input voltage: -0.3 to VCC +0.3V; (12)VOCSET OCSET pin input voltage: -0.3 to VCC +0.3V; (13)VREF VREF pin voltage: -0.3 to VCC +0.3V; (14)IDDZ Floating input supply zener clamp current: -10mA; (15)ICCZ Low-side supply zener clamp current: -10mA; (16)IBSZ Floating supply zener clamp current: -10mA; (17)IOREF Reference output current: -5mA; (18)d VS /dt Allowable VS voltage slew rate: -50V/ns; (19)d VSS /dt Allowable VSS voltage slew rate: -50V/ns; (20)d VSS /dt Allowable VSS voltage slew rate upon power-up: -50V/ms; (21)PD Maximum power dissipation: -1.0 W; (22)Rth,JA Thermal resistance, junction to ambient: -115℃/W; (23)TJ Junction temperature: -150℃; (24)TS Storage temperature: -55 to 150℃; (25)TL Lead temperature (soldering, 10 seconds): -300℃.

Features

IRS20957STRPBF features: (1)Floating PWM input enables easy half bridge implementation; (2)Integrated programmable bi-directional over-current protection with self-reset function; (3)Programmable compensated preset deadtime for improved THD performances; (4)High noise immunity; (5)±100V high voltage ratings deliver up to 500W output power; (6)3.3V/5 V logic compatible input; (7)Operates up to 800 kHz; (8)RoHS compliant.

Diagrams