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TDA1566

I²C-bus controlled dual channel 46 W/2Ω, single channel 92 W/1Ωamplifier with load diagnostic features

NXP Semiconductors. 

NXP Semiconductors

TDA1566

I2C-bus controlled dual channel/single channel amplifier

6.1.3 Balanced and unbalanced input sources

The TDA1566 accepts balanced as well as unbalanced input signals. Table 7 and Table 8

show the required hard or software setting and Figure 6 shows the input source

connection. Note that the unbalanced input source should be connected to the positive

BTL channel input. Note that the J version accepts in non-I2C-bus mode only a balanced

input source.

Table 7. Balanced and unbalanced input source setting TDA1566TH

Source

Balanced input source

Unbalanced input source

I2C-bus mode

IB3[D1] = 0

IB3[D1] = 1

Non-I2C-bus mode

ADS2 pin connected to GND ADS2 pin unconnected

Table 8. Balanced and unbalanced input source setting TDA1566J

Source

Balanced input source

Unbalanced input source

I2C-bus mode

IB3[D1] = 0

IB3[D1] = 1

Non-I2C-bus mode

default

not selectable

Fig 6. Balanced (left) and unbalanced (right) input source

001aad 009

6.1.4 Single channel 1 Ω operation

The input and output pins for single channel 1 Ω operation are listed in Table 9. The 1 Ω

operation requires that on the PCB the output pins are shorted as indicated in Table 9. In

the 1 Ω operation the input signal is taken from channel 1.

To prevent instability in 1 Ω operation the amplifier must not be used in line driver mode

with a load larger than 25 Ω.

Table 9.

Symbol

IN2+

IN2−

IN1+

IN1−

1OHM

OUT1+

OUT1−

OUT2+

OUT2−

Pinning for the single channel 1 Ω mode; TDA1566TH and TDA1566J

Pin

Pin

Description single channel

(TDA1566TH) (TDA1566J) operation

Description dual channel

operation

2

22

disabled: connect IN2+ with 470 nF positive input channel 2

to SGND

3

23

disabled: connect IN2+ with 470 nF negative input channel 2

to SGND

10

3

positive input channel 1

positive input channel 1

11

4

negative input channel 1

negative input channel 1

15

8

1 Ω select pin connected to VP

1 Ω select pin connected to GND

16

10

positive output channel 1

positive output channel 1

18

13

negative output channel 1

negative output channel 1

19

15

shorted on board to OUT1−

positive output channel 2

21

18

shorted on board to OUT1+

negative output channel 2

TDA1566_2

Product data sheet

Rev. 02 — 20 August 2007

© NXP B.V. 2007. All rights reserved.

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