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TDA1566J

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

For optimized pop performance it is recommended to keep the amplifier in mute until the

SVR voltage has reached its final level.

When the amplifier is switched off by pulling the EN pin LOW the amplifier is muted (fast

mute) and the capacitor on the SVR pin will be discharged. With an SVR capacitor of

22 µF the off current is reached 2 s after the EN pin is switched to zero.

Start-up and shutdown in I2C-bus mode is shown in Figure 11 and explained in Table 20.

VP

DIAG

DB3[D7]

DB3[D4]

IB1[D0]

IB2[D0] = 0

2

1

EN

5

3

7

4

6

9

8

SVR

OUTx

t wake

t d(mute_off)

t dcload

t d(mute-fgain)

slow

mute

10

fast

mute

Fig 11. Start-up and shutdown timing in I2C-bus mode

001aad 014

Table 20. Start-up and shutdown timing in I2C-bus mode

Step Action

Result

1

TDA1566 is enabled with EN TDA1566 from off to standby

DB3[D7] is set and DIAG is pulled LOW to indicate

power-on reset

2

TDA1566 is switched from DIAG is released

standby to operating with

IB1[D0] = 1

DB3[D7] is reset

SVR capacitor is charged, OUTx voltage tracks SVR

voltage

gradual increase of gain; when the SVR voltage increases

above a threshold of 2 V + 2VBE the amplifiers operate at

full gain

TDA1566_2

Product data sheet

Rev. 02 — 20 August 2007

© NXP B.V. 2007. All rights reserved.

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