IR Introduces Class D Audio Chipset Featuring the IRS20965 Driver IC with Protected PWM Switching for High Performance Audio Amplifiers

Apr 3, 2014 | Technology Media

EL SEGUNDO, Calif. — International Rectifier, IR ® (NYSE: IRF), a world leader in power management technology, today introduced a Class D audio chipset comprising the IRS20965 digital audio driver IC with protected Pulse Width Modulation (PWM) switching and a full complement of audio MOSFETs optimized for high performance Class D audio amplifier applications.

The IRS20965 features high-side and low-side independent floating PWM input to allow deadtime control from an external PWM controller. Shoot-through prevention logic provides additional safety in the event of PWM controller failure. The new IC also features over-current sensing output and 2A gate drive output capability.

"The new chipset featuring the IRS20965 brings the additional flexibility of an external controller which programs performance and protection features. For example, it allows non-shutdown overload protection while maintaining high audio performance," said Jun Honda, Director of Audio Systems Engineering, IR's Energy Saving Products Business Unit.

Operating up to 800kHz, other key features of the IRS20965 include programmable bidirectional over-current detection with self-reset function, high noise immunity, ±100 V ratings to deliver up to 500W in output power and 3.3 V / 5 V logic compatible input.

Part Number Package Voffset Io+/Io- Propagation Delay OC Protection Delay Shutdown Delay
IRS20965SPBF 16-Lead SOIC +/- 100V 2 A/2 A 120 ns 500 s 250 ns
Part Number BVDSS RDS(on)(mOhm) Qgtot (nC) Package
IRF6644 100 10.3 35 DFET SJ
IRF6645 100 28 14 DFET SJ
IRF6665 100 53 8.4 DFET SH
IRF6648 60 5.5 36 DFET MN
IRF6646 80 7.6 36 DFET MN
IRF6668 80 12 22 DFET MZ
IRF6643 150 34.5 39 DFET MZ
IRF6775M 150 47 25 DFET MZ
IRF6641 200 60 34 DFET MZ
IRF6785M 200 85 26 DFET MZ
IRFB4212pbf 100 72 15 TO-220
IRFB5615pbf 150 32 26 TO-220
IRFB4019pbf 150 80 13 TO-220
IRFB4227pbf 200 19.7 70 TO-220
IRFB5620pbf 200 60 25 TO-220
IRFB4020pbf 200 80 18 TO-220
IRFB4229pbf 250 38 72 TO-220
IRFI4024H-117P 55 48 8.9 5-pin TO-220
IRFI4212H-117P 100 72.5 15 5-pin TO-220
IRFI4019H-117P 150 80 13 5-pin TO-220
IRFI4020H-117P 200 80 19 5-pin TO-220

Pricing for the IRS20965SPBF begins at US $3.83 each in 10,000-unit quantities. Production orders are available immediately. The devices are RoHS compliant and industrial qualified. Prices are subject to change.

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