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TDA1566 Fiches technique(PDF) 8 Page - NXP Semiconductors

No de pièce TDA1566
Description  I2C-bus controlled dual channel 46 W/2 OHM, single channel 92 W/1 OHM amplifier
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Fabricant  NXP [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo NXP - NXP Semiconductors

TDA1566 Fiches technique(HTML) 8 Page - NXP Semiconductors

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TDA1566_2
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 20 August 2007
8 of 46
NXP Semiconductors
TDA1566
I2C-bus controlled dual channel/single channel amplifier
6.1.2 Gain selection
The TDA1566 features a 16 dB and a 26 dB gain setting. The 16 dB setting is referred to
as line driver mode, the 26 dB setting is referred to as amplifier mode. Table 6 shows how
the gain is selected.
[1]
Channel 1.
[2]
Channel 2.
[3]
Both channels.
6.1.2.1
I2C-bus mode
The gain is selected with IB3[D6] for channel 1 and IB3[D5] for channel 2. If the gain
select is performed when the amplifier is muted, the gain select will be pop free. See
Section 6.4.2 for the definition of the instruction bytes.
If DC load detection is used, IB1[D1] = 1, auto gain select is activated. Detection of an
open load (see Section 6.2.1) will result in a line driver mode setting. If the load detection
data is invalid, IB3[D5] and IB3[D6] will define the gain setting.
6.1.2.2
Non-I2C-bus mode
The gain for channel 1 and channel 2 is selected with the PROG pin. Leaving the pin
unconnected selects 26 dB gain and connecting a resistor of 1500
Ω between the PROG
pin and GND selects 16 dB gain.
When the amplifier is used in line driver mode loads of 2
Ω and 4 Ω can be driven. With a
load larger than 25
Ω a Zobel network of 33 nF in series with 22 Ω should be connected
between the amplifier output terminals. The Zobel network should be placed close to the
output pins. To prevent instability in 1
Ω mode the amplifier must not be used in line driver
mode with a load larger than 25
Ω.
Fig 5.
Enable pin mode switching in I2C-bus and non-I2C-bus mode
001aad008
0 V
1.0 V
2.6 V
4.5 V
6.5 V
VP
0 V
1.0 V
2.6 V
VP
non-I2C-bus mode
I2C-bus mode
mute
operating
off
off
operation mode defined by IB1[D0] and IB2[D0]
Table 6.
Gain select in I2C-bus and non-I2C-bus mode
Gain select
16 dB
26 dB
I2C-bus
IB3[D6] = 1
IB3[D6] = 0[1]
IB3[D5] = 1
IB3[D5] = 0[2]
Non-I2C-bus
PROG connected with 1.5 k
to GND
PROG open[3]


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