IVR8511 Datasheet, PDF (6/7 Pages) Aplus Intergrated Circuits – aIVR8511 – 85 sec

Integrated Circuits Inc.
TYPICAL APPLICATIONS
aIVR8511
3.3V
R1
1M
ROSC=610K
Rrst = 4.7K
VDD,VDDA
C1, 0.1uF
OSC
PB0
VOUT1
C2
PB1
VOUT2_
SP
PB2
COUT
PB3
Crst = 0.1uF
RSTB
VSS
Note:
1. PB0 to PB2 are set to input; PB3 is set to output
2. C1 must be connected directly on the VDD and VSS pins of the chip
3. R1 is optional for fast discharge of C1 and Crst when power off.
4. C2 is added according to the table below:
VOUT Volume
SPK
C2
Normal
8, 16 or 32 Ω
Not needed
High
16 or 32 Ω
Not needed
High
8Ω
1000pF (102)
High
<8Ω
2000pF (202)
Using 3.3V Battery Direct Drive Speaker
HT7335
4.5V
ROSC = 610K
4.7K
0.1uF
VDD,VDDA
OSC
PB0
VOUT2_
PB1
COUT
PB2
RSTB
VSS
C1, 0.1uF
8Ω 1/4W
Speaker
Tr
Rb
Note :
PB0 to PB2 are set to input
C1 must be connected directly on the VDD and VSS pins
Output driving of HT LDO:
HT7133 (30mA, 3.3V)
HT7536 (100mA, 3.6V)
HT7335 (250mA, 3.5V)
Using 4.5V Battery with COUT speaker drive
7
Aug 23, 2010