Philips TDA8943SF - Manual (Page 6)

Philips Semiconductors
TDA8943SF
7 W mono BTL audio amplifier
Preliminary specification 14 April 1999 6 of 12
9397 750 04877 © Philips Electronics N.V. 1999. All rights reserved.
12. Dynamic characteristics
[1] The noise output voltage is measured at the output in a frequency range from 20 Hz to 20 kHz (unweighted), with a source impedance
R
source
= 0
Ω
at the input.
[2] Supply voltage ripple rejection is measured at the output, with a source impedance R
source
= 0 Ω at the input. The ripple voltage is a sine
wave with a frequency f
ripple
and an amplitude of 100 mV (RMS), which is applied to the positive supply rail.
[3] Output voltage in mute mode is measured with an input voltage of 1 V (RMS) in a bandwidth of 20 kHz, so including noise.
13. Application information
Table 8: Dynamic characteristics
V
CC
= 12 V; T
amb
= 25
°
C; R
L
= 8
Ω
; f = 1 kHz; V
MODE
= 0 V; measured in test circuit Figure 3 ; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
P
o
output power THD = 10% 6 7 - W
THD = 0.5% 4 5 - W
THD total harmonic distortion P
o
= 1 W - 0.03 0.1 %
G
v
voltage gain 31 32 33 dB
Z
i(dif)
differential input impedance 70 90 110 k
Ω
V
n(o)
noise output voltage [1] - 90 120
µ
V
SVRR supply voltage ripple rejection f
ripple
= 1 kHz [2] 50 - - dB
f
ripple
= 100 Hz
to 20 kHz
[2] - <tbf> - dB
V
o(mute)
output voltage mute mode [3] - - 50
µ
V
Fig 3. Application diagram.
handbook, full pagewidth
MBK943
STANDBY/
MUTE LOGIC
SHORT CIRCUIT
AND
TEMPERATURE
PROTECTION
20
k Ω
20
k Ω
5
TDA8943SF
4 3
1
7
6
VCC
VCC
VCC
1000 µ F
10 µ F
100 nF
8
2
OUT +
GND
SVR
OUT − IN −
IN +
MODE
220 nF
Rsource
Vi
220 nF
MICROCONTROLLER
RL
8
Ω