Philips Semiconductors
2 × 1.5 W BTL audio amplifier
Product specification
TDA8542AT
BTL APPLICATION
handbook, full pagewidth
R2 50 kΩ
1 µF R1
10 kΩ
ViL
C3
47 µF
INL−
19
17
INL+
16
OUTR−
12
OUTL−
18
100 nF
RL
OUTL+
3
R4 50 kΩ
1 µF R3
TDA8542AT
INR−
14
10 kΩ
ViR
INR+
15
OUTR−
13
SVR
5
RL
MODE
4
OUTR+
8
Gain left = 2 × RR-----21--
BTL/SE
62
9
Gain right = 2 × RR-----43--
Pins 1, 10, 11 and 20 connected to ground.
GND
MGM213
Fig.3 BTL application.
VCC
100 µF
30
handbook, halfpage
Iq
(mA)
20
10
MGD890
10
handbook, halfpage
THD
(%)
1
(1)
(2)
10−1
MGM214
0
0
4
8
12
16
20
VCC (V)
RI = ∞.
Fig.4 Iq as a function of VCC.
1998 Mar 25
10−2
10−2
10−1
1 Po (W) 10
f = 1 kHz, Gv = 20 dB.
(1) VCC = 6 V, RL = 8 Ω.
(2) VCC = 7.5 V, RL = 16 Ω.
Fig.5 THD as a function of Po.
9