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參數(shù)資料
| 型號： | 8547TS |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 音頻放大器 |
| 英文描述： | 2 x 0.7 W BTL audio amplifier with output channel switching |
| 中文描述： | 2 × 0.7糯橋接音頻放大器的輸出開關(guān)通道 |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 162K |
| 代理商： | 8547TS |
1998 Apr 01
5
Philips Semiconductors
Product specification
2
×
0.7 W BTL audio amplifier with
output channel switching
TDA8547TS
SELECT pin
If the voltage at the SELECT pin is in the range between
1.5 V and V
CC
1.5 V, or if it is kept floating, then both
channels can be operational. If the SELECT pin is set to a
LOW voltage or grounded, then only channel 2 can
operate and the power amplifier of channel 1 will be in the
standby mode. In this case only the loudspeaker at
channel 2 can operate and the loudspeaker at channel 1
will be switched off. If the SELECT pin is set to a
HIGH level or connected to V
CC
, then only channel 1 can
operate and the power amplifier of channel 2 will be in the
standby mode. In this case only the loudspeaker at
channel 1 can operate and the loudspeaker at channel 2
will be switched off. Setting the SELECT pin to a LOW or
a HIGH voltage results in a reduction of quiescent current
consumption by a factor of approximately 2.
Switching with the SELECT pin during operating is not
plop-free, because the input capacitor of the channel
which is coming out of standby needs to be charged first.
For plop-free channel selecting the device has first to be
set in mute condition with the MODE pin (between 1.5 V
and V
CC
1.5 V), then set the SELECT pin to the new
level, after a delay set the MODE pin to a LOW level.
The delay needed depends on the values of the input
capacitor and the feedback resistors. Time needed is
approx. 10
×
C1
×
(R1 + R2), so approximately 0.6 s. for
the values in Fig.4.
Table 1
Voltage levels at control pins at V
P
= 5 V; for other supply voltages see Figs. 14 and 15.
Control pins MODE and SELECT versus status of output channels
Notes
1.
2.
3.
4.
5.
HIGH = V
pin
> V
CC
0.5 V.
NC = not connected or floating.
X = don’t care.
HVP = 1.5 V < V
pin
< V
CC
1.5 V.
LOW = V
pin
< 0.5 V.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
CONTROL PIN
STATUS OF OUTPUT
CHANNEL
TYP. I
q
(mA)
MODE
SELECT
X
(3)
HVP
(4)
/NC
(2)
HVP
(4)
/NC
(2)
HIGH
(1)
HVP
(4)
/NC
(2)
LOW
(5)
CHANNEL 1 CHANNEL 2
HIGH
(1)
/NC
(2)
HVP
(4)
LOW
(5)
HVP
(4)
/LOW
(5)
HVP
(4)
/LOW
(5)
HVP
(4)
/LOW
(5)
standby
mute
on
mute/on
mute/on
standby
standby
mute
on
standby
mute/on
mute/on
0
15
15
8
15
8
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
CC
V
I
I
ORM
T
stg
T
amb
V
Psc
P
tot
supply voltage
input voltage
repetitive peak output current
storage temperature
operating ambient temperature
AC and DC short-circuit safe voltage
power dissipation
operating
0.3
0.3
55
40
+18
V
CC
+ 0.3
1
+150
+85
10
1.1
V
V
A
°
C
°
C
V
W
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