Datasheet

TPA2028D1

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SLOS660B –JANUARY 2010–REVISED SEPTEMBER 2012

IC FUNCTION CONTROL (Address: 1)

C BIT LABEL DEFAULT DESCRIPTION

ADDRESS

01 (01

) – IC 7 Unused 1

Function Control

6 EN 1 (enabled) Enables amplifier

5 SWS 0 (enabled) Shutdown IC when bit = 1

4 Unused 0

3 FAULT 0 Changes to a 1 when there is a short at the output. Reset by writing a 0

2 Thermal 0 Changes to a 1 when die temperature is above 150°C

1 Unused 1

0 NG_EN 1 (enabled) Enables Noise Gate function

EN: Enable bit for the audio amplifier channel. Amplifier is active when bit is high. This function is

gated by thermal and returns once the IC is below the threshold temperature

SWS: Software shutdown control. The device is in software shutdown when the bit is '1' (control, bias

and oscillator are inactive). When the bit is '0' the control, bias and oscillator are enabled.

Fault: This bit indicates that an over-current event has occurred on the channel with a '1'. This bit is

cleared by writing a '0' to it.

Thermal: This bit indicates a thermal shutdown that was initiated by the hardware with a '1'. This bit is

deglitched and latched, and can be cleared by writing a '0' to it.

NG_EN: Enable bit for the Noise Gate function. This function is enabled when this bit is high. This

function can only be enabled when the Compression ratio is not 1:1.

AGC ATTACK CONTROL (Address: 2)

LABEL DEFAULT DESCRIPTION

ADDRESS BIT

02 (02

) – 7:6 Unused 00

AGC Attack

5:0 ATK_time 000101 AGC Attack time (gain ramp down)

Control

(6.4 ms/6 dB)

Per Step Per 6 dB 90% Range

000001 0.1067 ms 1.28 ms 5.76 ms

000010 0.2134 ms 2.56 ms 11.52 ms

000011 0.3201 ms 3.84 ms 17.19 ms

000100 0.4268 ms 5.12 ms 23.04 ms

(time increases by 0.1067 ms with every step)

111111 6.722 ms 80.66 ms 362.99 ms

ATK_time These bits set the attack time for the AGC function. The attack time is the minimum time

between gain decreases.

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