IVR3K42 Datasheet, PDF (7/11 Pages) Aplus Intergrated Circuits – Data Sheet

Integrated Circuits Inc.
TYPICAL APPLICATIONS
Key single mode with speaker direct drive (PWM)
aIVR3K Series
C1 must be connected directly on the VDD and VSS pins of the chip
Key single mode with COUT speaker drive (DAC)
C1 must be connected directly on the VDD and VSS pins of the chip
Rb is base resistor from 120 Ohm to 390 Ohm depends on value of VDD and transistor
gain.
Tr is an NPN transistor with beta larger than 150, e.g. 8050D.
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Mar 27, 2012