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TDA8947J Datasheet(Fiches technique) 9 Page - NXP Semiconductors

Numéro de pièce TDA8947J
Description  4-channel audio amplifier (SE: 1 W to 25 W; BTL: 4 W to 50 W)
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
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Philips Semiconductors
TDA8947J
4-channel audio amplifier
Preliminary data
Rev. 01 — 06 February 2004
9 of 24
9397 750 10779
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
11. Static characteristics
[1]
A minimum load is required at supply voltages of VCC > 22 V: RL =3 Ω for SE and RL =6 Ω for BTL.
[2]
The amplifier can deliver output power with non clipping output signals into nominal loads as long as the ratings of the IC are not
exceeded.
[3]
With a load connected at the outputs the quiescent current will increase.
[4]
The DC output voltage, with respect to ground, is approximately 0.5VCC.
[5]
∆V
OUT = VOUT+ − VOUT
[6]
Channels 3 and 4 can only be set to mute or on by MODE2 when VMODE1 >VCC − 2.0 V.
12. Dynamic characteristics
Table 8:
Static characteristics
VCC =18V; Tamb =25 °C; RL =8 Ω; VMODE1 =VCC; VMODE2 =VCC; Vi = 0 V; measured in test circuit Figure 12; unless
otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Supply
VCC
supply voltage
operating
[1] 9
1826V
no (clipping) signal
[2] --28
V
Iq
quiescent supply current
RL = ∞
[3] -
100
145
mA
Istb
standby supply current
-
-
10
µA
Output pins
VO
DC output voltage
[4] -9
-V
∆VOUT
differential output voltage offset
BTL mode
[5] -
-
170
mV
Mode selection pins
VMODE1
selection voltage on pin MODE1 on
VCC − 2.0 -
VCC
V
mute
4.5
-
VCC − 3.5 V
standby
0
-
0.8
V
VMODE2
selection voltage on pin MODE2 on: channels 3 and 4
[6] VCC − 2.0 -
VCC
V
mute: channels 3 and 4
0
-
VCC − 3.5 V
IMODE1
selection current on pin MODE1 0 < VMODE1 <(VCC − 3.5 V)
-
-
20
µA
IMODE2
selection current on pin MODE2 0 < VMODE2 <(VCC − 3.5 V)
-
-
20
µA
Table 9:
Dynamic characteristics SE
VCC =18V; Tamb =25 °C; RL =4 Ω; f = 1 kHz; VMODE1 =VCC; VMODE2 =VCC; measured in test circuit Figure 12; unless
otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Po(SE)
SE output power
VCC = 18 V; see Figure 8a
THD = 10 %; RL =4 Ω
7
8.5
-
W
THD = 0.5 %; RL =4 Ω
-
6.5
-
W
VCC =22V
THD = 10 %; RL =4 Ω
-14
-
W
THD
total harmonic distortion
Po = 1 W
-
0.1
0.5
%
Gv
voltage gain
25
26
27
dB
Zi
input impedance
40
60
-
k
Vn(o)
noise output voltage
[1] -
150
-
µV




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