RTH
參數(shù)資料
型號: SSM2317-MINI-EVALZ
廠商: Analog Devices Inc
文件頁數(shù): 8/20頁
文件大?。?/td> 0K
描述: BOARD EVAL MINI SSM2317
標準包裝: 1
放大器類型: D 類
輸出類型: 1-通道(單聲道)
在某負載時最大輸出功率 x 通道數(shù)量: 3.89W x 1 @ 3 歐姆
電源電壓: 2.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
板類型: 完全填充
已用 IC / 零件: SSM2317
已供物品:
產(chǎn)品目錄頁面: 764 (CN2011-ZH PDF)
相關產(chǎn)品: SSM2317CBZ-REEL-ND - IC AMP AUDIO 3.89W 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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