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參數(shù)資料
| 型號： | TDA8547TS-T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, MO-152, SOT266-1, SSOP-20 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大小： | 491K |
| 代理商： | TDA8547TS-T |
1998 Apr 01
5
NXP 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 VCC 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 VCC, 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 VCC 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
Control pins MODE and SELECT versus status of output channels
Notes
1. HIGH = Vpin >VCC 0.5 V.
2. NC = not connected or floating.
3. X = don’t care.
4. HVP = 1.5 V < Vpin <VCC 1.5 V.
5. LOW = Vpin <0.5 V.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
CONTROL PIN
STATUS OF OUTPUT
CHANNEL
TYP. Iq
(mA)
MODE
SELECT
CHANNEL 1 CHANNEL 2
HIGH(1)/NC(2)
standby
0
HVP(4)
HVP(4)/NC(2)
mute
15
LOW(5)
HVP(4)/NC(2)
on
15
mute/on
standby
8
HVP(4)/NC(2)
mute/on
15
LOW(5)
standby
mute/on
8
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VCC
supply voltage
operating
0.3
+18
V
VI
input voltage
0.3
VCC +0.3
V
IORM
repetitive peak output current
1A
Tstg
storage temperature
55
+150
°C
Tamb
operating ambient temperature
40
+85
°C
VPsc
AC and DC short-circuit safe voltage
10
V
Ptot
power dissipation
1.1
W
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