AP8910A1_15 Datasheet, PDF (17/18 Pages) Aplus Intergrated Circuits – Integrated Circuits Inc

Integrated Circuits Inc.
TYPICAL APPLICATIONS
aP8921A/10A
Fig. 12 Using 4.5V Battery
Note 1: Two capacitors Cin and Cout must be connected from VDD and V33 pins to VSS to
stabilize the power supply to the chip. When small capacity battery, e.g. AG10, is
used, Cin and Cout may need to be as large as 22uF. However, if Cin and Cout is
too large, the power-up reset generated by 0.1uF at the RST pin may not be function
because it takes longer time for both Cin and Cout to discharge.
Note 2: 16 Ohm speaker will provide lauder and better sound quality when the VOUT speaker
direct drive is used.
Note 3: The value of the 390 Ohm base resistor should be modified according to different Vdd
value, the kind of speaker and NPN transistor.
Note 4: The VPP pin should be leave unconnected for playback.
Ver 5.0
17
Aug 23, 2011