参数资料
型号: SSM2317-EVALZ
厂商: Analog Devices Inc
文件页数: 8/20页
文件大小: 0K
描述: BOARD EVAL SSM2317
标准包装: 1
放大器类型: D 类
输出类型: 1-通道(单声道)
在某负载时最大输出功率 x 通道数量: 3.89W x 1 @ 3 欧姆
电源电压: 2.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
板类型: 完全填充
已用 IC / 零件: SSM2317
已供物品:
相关产品: SSM2315CBZ-REEL-ND - IC AMP AUDIO 4.28W MONO D 9WLCSP
SSM2317CBZ-REEL7DKR-ND - IC AMP AUDIO 3.89W MONO D 9WLCSP
SSM2317CBZ-REEL7CT-ND - IC AMP AUDIO 3.89W MONO D 9WLCSP
SSM2317CBZ-REEL7TR-ND - IC AMP AUDIO 3.89W MONO D 9WLCSP
SSM2317
Rev. A | Page 16 of 20
OUTPUT THRESHOLD
1400
1200
1000
800
600
400
200
0
0.1
1
10
100
1k
10k
RTH (k)
O
UT
P
UT
P
O
W
E
R
(
m
W
)
07
24
2-
0
44
5V (8)
4.2V (8)
3.6V (8)
2.5V (8)
The maximum output amplitude threshold (VTH) during the
limiting mode can be changed from 90% to 45% of VDD by
having an external resistor, RTH, between the VTH pin and GND.
Shorting the VTH pin to GND sets VTH to 90% of VDD. Leaving
the VTH pin unconnected sets VTH to 45% of VDD. The relation
of RTH to VTH is shown by the following equation:
DD
TH
V
R
V
×
+
×
=
2
50
50
9
.
0
Maximum output power is derived from VTH by the following
equation:
SP
TH
OUT
R
V
P
2
=
Figure 44. Maximum Output Power vs. RTH
ENABLE/DISABLING ALC
where RSP is the speaker impedance.
The ALC function is enabled when the ALC_EN pin is set to
VDD. The ACL function can be enabled and disabled during
amplifier operation. As a result of enabling ALC, ISY increases
by 100 μA and there is less than 50 μA source current from the
VTH pin to GND via RTH. When ALC is disabled, the source
current is 0 μA and the VTH pin is tied to GND.
Figure 43 shows the relationship between the RTH value and
VTH. Figure 44 shows the relationship between the maximum
output power and the RTH value.
100
90
80
70
60
50
40
0.1
1
10
100
1k
10k
RTH (k)
OU
TP
U
T
S
W
IN
G
(
%
o
fV
DD
)
07
24
2-
04
3
Figure 43. Output Threshold (VTH) vs. RTH
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