SPC11A Просмотр технического описания (PDF) - Unspecified
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SPC11A Datasheet PDF : 14 Pages
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Preliminary
SPC11A
8.2. Current Mode DAC Speaker Driver
C1: 0.1µ F ~ 1µ F
RB1: 680 ~ 1.5K
VDD
4Ω ~ 8Ω
AUD
C1
RB1
8050
Figure 1
RB1: 2K~10K; C1: 1 µ F~10µ F
RB2: ~1K; C2: ~0.1 µ F
VDD
4Ω ~ 64Ω
C2
AUD
RB2
RB1
C1
Figure 3
VDD
8050
RB1: ~ 360Ω (Vol)
RB2: ~ 4.7Ω
AUD
1N4148
RB1
Figure 5
4Ω ~ 64Ω
8050
RE1
RB1: 10K ~ 50K
RB2: 820 ~ 1.5K
C1: 0.1µ F ~ 1µ F
VDD
32Ω ~ 64Ω
AUD
RB2
RB1
C1
8050
Figure 2
RB1: 2K~10K; C1: 1 µ F~10µ F
RB2: ~1K; C2: ~0.1 µ F
VDD
Enable RB1
4Ω ~ 8Ω
AUD
RB2
C2
C1
8050
Figure 4
AUDP
RB1
Power
3
2
20K
6
5
LM386
7
4
220µ F
10
0.1µ F
0.01µ F
Figure 6
Figure 1: The simplest CKT uses with low impedance speaker. It has high operation current, but low cost.
Figure 2: It is the same as Figure 1 but a high impedance speaker is used.
Figure 3: The CKT contains a low pass filter. It is capable of providing higher speech quality, but it takes higher operation current.
Figure 4: Improved version of Figure 3. The standby current can be controlled by the enable pin.
Figure 5: The current mirror mode. It is able to control the volume. In addition, it is more stable and has lower operation current than Figure 1-3.
Figure 6: High quality, low operation current CKT, but more expensive.
© Sunplus Technology Co., Ltd.
10
Proprietary & Confidential
JUL. 09, 2001
Preliminary Version: 0.1
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