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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

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

Step Action

Result

3

SVR voltage has become larger than VP / 2 resulting in

setting DB3[D4]

4

TDA1566 is switched from DIAG is pulled LOW

operating to standby with

IB1[D0] = 0

SVR is discharged, OUTx voltage tracks SVR voltage

amplifier is slow muted

5

SVR voltage has dropped below VP / 2 resulting in

resetting DB3[D4]

6

TDA1566 is switched from see step 2

standby to operating with

IB1[D0] = 1

7

see step 3

8

TDA1566 is disabled with DIAG is pulled LOW

EN

amplifier is fast muted

SVR is discharged, OUTx voltage tracks SVR voltage

9

see step 5

10

OUTx is at ground potential, DIAG is released, TDA1566 is

off

6.5.2 Engine start

The DC-output voltage of the amplifier follows the voltage on the SVR pin. On the SVR pin

a capacitor is connected which is used for start-up and shutdown timing as well as for DC

load detection. If the supply voltage drops during engine start below 8.6 V the SVR

capacitor will be discharged and the fast mute is activated to prevent audible transients at

the output.

If in I2C-bus mode the supply voltage drops below 5.5 V (see VP(POR)) the content of the

I2C-bus latches cannot be guaranteed and the power-on reset will be activated:

DB3[D7] = 1. All latches will be reset, the amplifier is switched off and the DIAG pin will be

pulled LOW to indicate that a power-on reset has occurred. The TDA1566 will not start-up

but wait for a command to start-up.

7. Limiting values

Table 21. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Parameter

Conditions

VP

supply voltage

operating; RL = 4 Ω

operating; RL = 2 Ω or

1Ω

non operating

VP(r)

IOSM

reverse supply voltage

non-repetitive peak output current

load dump protection;

during 50 ms;

tr ≥ 2.5 ms

maximum 10 minutes

Min

Max

Unit

-

18

V

-

16

V

−1

+50

V

-

50

V

-

−2

V

-

13

A

TDA1566_2

Product data sheet

Rev. 02 — 20 August 2007

© NXP B.V. 2007. All rights reserved.

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