TDA8566 Datasheet, PDF (11/21 Pages) NXP Semiconductors – 2 ´ 40 W/2 W stereo BTL car radio power amplifier with differential inputs and diagnostic outputs

NXP Semiconductors
TDA8566
2 × 40 W/2 Ω stereo BTL car radio power amplifier
Table 8. Dynamic characteristics …continued
V_P = 14.4 V; T_amb = 25 °C; R_L = 2 Ω; f_i = 1 kHz; measured in test circuit of Figure 9; unless
otherwise specified.
Symbol Parameter
Conditions
Min Typ Max Unit
V_o(mute) output signal
V_in = V_in(max) = 1 V (RMS)
-
-
2
mV
voltage in mute
CMRR
common mode
rejection ratio
R_s = 0 Ω
R_s = 45 kΩ
[5] ₆₀
75
-
dB
[6] ₄₀
-
-
dB
[1] Dynamic distortion detector active; pin CLIP is LOW.
[2] Frequency response externally fixed.
[3] V_ripple = V_ripple(max) = 2 V (p-p); R_s = 0 Ω.
[4] Noise measured in a bandwidth of 20 Hz to 20 kHz.
[5] Common mode rejection ratio measured at the output (over R_L) with both inputs tied together;
V_common ≤ 3.5 V (RMS); f_i = 100 Hz to 10 kHz; R_s = 0 Ω.
[6] Common mode rejection ratio measured at the output (over R_L) with both inputs tied together;
V_common ≤ 3.5 V (RMS); f_i = 1 kHz; R_s = 45 kΩ. The mismatch of the input coupling capacitors is excluded.
12. Application information
12.1 Diagnostic output
Special care must be taken in the PCB layout to separate pin CLIP from
pins IN1+, IN1−, IN2+ and IN2− to minimize the crosstalk between the CLIP output and
the inputs.
12.2 Mode select switch
To avoid switch-on plops, it is advisable to keep the amplifier in the mute mode during
≥ 150 ms (charging of the input capacitors at pins IN1+, IN1−, IN2+ and IN2−). The circuit
in Figure 8 slowly ramps-up the voltage at the mode select switch pin when switching on
and results in fast muting when switching off.
+V_P
S
10 kΩ
100 Ω
Fig 8. Mode select switch circuit
+
47 µF
mode
select
switch
100 kΩ
mgd102
TDA8566_6
Product data sheet
Rev. 06 — 15 October 2007
© NXP B.V. 2007. All rights reserved.
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