TDA8547 Philips Semiconductors, TDA8547 Datasheet - Page 5

• Manufacturer Part Number: TDA8547
• Description: 2 x 1 W BTL audio amplifier with output channel switching
• Manufacturer: Philips Semiconductors

Philips Semiconductors
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.
Table 1 Control pins MODE and SELECT versus status of output channels
Voltage levels at control pins at V
Notes
1. HIGH = V
2. NC = not connected or floating.
3. X = don’t care.
4. HVP = 1.5 V < V
5. LOW = V
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
QUALITY SPECIFICATION
In accordance with “SNW-FQ-611-E” . The number of the quality specification can be found in the “Quality Reference
Handbook” . The handbook can be ordered using the code 9397 750 00192.
1997 Oct 07
V
V
I
T
T
V
P
ORM
SYMBOL
stg
amb
CC
I
Psc
tot
2
channel switching
1 W BTL audio amplifier with output
HVP
HVP
HVP
HIGH
pin
LOW
MODE
HVP
supply voltage
input voltage
repetitive peak output current
storage temperature
operating ambient temperature
AC and DC short-circuit safe voltage
total power dissipation
pin
(4)
(4)
(4)
(1)
< 0.5 V.
/LOW
/LOW
/LOW
> V
/NC
(4)
(5)
CC
pin
(2)
(5)
(5)
(5)
< V
0.5 V.
PARAMETER
CONTROL PIN
CC
1.5 V.
P
= 5 V; for other supply voltages see Figs. 14 and 15.
HVP
HVP
HVP
SELECT
HIGH
LOW
X
(4)
(4)
(4)
(3)
/NC
/NC
/NC
(5)
(1)
operating
SO16
DIP16
(2)
(2)
(2)
CONDITIONS
5
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
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
the values in Fig.4.
CC
STATUS OF OUTPUT CHANNEL
CHANNEL 1
1.5 V), then set the SELECT pin to the new
mute/on
mute/on
standby
standby
C1
mute
on
(R1 + R2), so approximately 0.6 s. for
0.3
0.3
55
40
MIN.
CHANNEL 2
mute/on
mute/on
standby
standby
+18
V
1
+150
+85
10
1.2
2.2
mute
CC
Preliminary specification
on
MAX.
+ 0.3
TDA8547
V
V
A
V
W
W
C
C
TYP. I
UNIT
(mA)
15
15
15
0
8
8
q