參數(shù)資料
型號(hào): PT2256L
廠商: Princeton Technology Corporation
英文描述: Electronic Volume Controller IC
中文描述: 電子音量控制IC
文件頁(yè)數(shù): 11/21頁(yè)
文件大?。?/td> 409K
代理商: PT2256L
URL:http://www.princeton.com.tw
Fax:886-2-29174598
Tel:886-2-66296288
APPLICATION CIRCUIT
SINGLE POWER SUPPLY (NO LOUDNESS AND NO BACKUP CIRCUIT)
PT2256 V1.7
- 11 -
August, 2006
Electronic Volume Controller IC
PT2256
L-Ch Output
R-Ch Output
R-Ch Input
L-Ch Input
Rx
Cx
VSS
OUT1
IN1
LT1
AGND
/UP
/DN
OSC
VDD
OUT2
IN2
LT2
AGND
DCO
/INH
/RST
PT2256
100K
3.9K
3.9K
10 F
10 F
UP Key
Down Key
0.1 F
10 F
10 F
0.1 F
10K
10K
100 F
VDD (4.5 to 12V)
+
+
+
+
+
+
Note:
Modifying the values of Rx and Cx affects the Oscillator Frequency of the IC. If the Fosc value is big,
then the volume control change is fast. Likewise, if the Fosc value is small, the volume control change
is slow. It is suggested that Rx=33K, Cx=2.2μF.
The table for the Rx, Cx and Fosc values are given below:
Rx
Cx
Fosc
33K
1.0
μ
F
34.1Hz
33K
2.2
μ
F
17.8Hz
33K
10
μ
F
3.4Hz
Rx
33K
51K
100K
Cx
1.0
μ
F
1.0
μ
F
1.0
μ
F
Fosc
34.1Hz
22.7Hz
11.8Hz
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