TDA8594 데이터 시트보기 (PDF) - NXP Semiconductors.

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TDA8594

I2C-bus controlled 4×50 W power amplifier

NXP Semiconductors. 

NXP Semiconductors

TDA8594

I2C-bus controlled 4 × 50 W power amplifier

When the SVR capacitor has discharged, the amplifier starts up again if the VP voltage is

above the low VP mute threshold, typically 7.5 V. Below the low VP mute threshold, the

outputs of the amplifier remain low. In I2C-bus mode, a supply voltage drop below VP(reset),

typically 5 V, results in setting bit DB2[D7] and not starting of the amplifiers but waiting for

an I2C-bus command to start.

The amplifier prevents audio pops during engine start. To prevent pops on the output

caused by the application during an engine start (for instance tuner regulator out of

regulation), the STB pin can be made zero when an engine start is detected. The STB pin

activates the fast mute and disturbances at the amplifier inputs are suppressed.

V

(V)

VP

14

VSVR

8.4

7

VO (2)

Vhr (1)

(1) Headroom voltage Vhr = VP − VO.

(2) Steady state output voltage VO = VSVR − 1.4 V.

(3) Headroom protection threshold = VO + 1.6 V.

Fig 7. Low headroom protection

1.6 V

headroom protection

threshold (3)

t (s)

001aad172

TDA8594_2

Product data sheet

Rev. 02 — 11 December 2007

© NXP B.V. 2007. All rights reserved.

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