TAS5721 datasheet(60/78 Pages) TI1

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AVDD/DVDD

PDN

PVDD

RST

T0420-06

3 V

8 V

6 V

I C

2 ms

0 ns

Initialization

50 ms

2 s

AVDD/DVDD

PDN

PVDD

RST

T0419-07

3 V

0 ns

10 s

100 s

13.5 ms

100 s

6 V

8 V

I C

SCL

SDA

Trim

Volume and Mute Commands

Exit

Enter

DAP

Config

Other

Config

PLL

(1)

1 ms + 1.3 t

stop

(2)

0 ns

Normal Operation

Shutdown

Powerdown

(1) t

has to be greater than 240 ms + 1.3 t

This constraint only applies to the first trim command following AVDD/DVDD power-up.

It does not apply to trim commands following subsequent resets.

(2) t

= PWM start/stop time as defined in register 0X1A

(3) When Mid-Z ramp is enabled (for 2.1 mode), t

= 300 ms

PLL

start

start stop

start

1 ms + 1.3 t

start

(2)(3)

TAS5721

SLOS739A – JULY 2012 – REVISED MARCH 2016

www.ti.com

Product Folder Links: TAS5721

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10.2.2.4 Recommended Startup and Shutdown Procedures

10.2.2.4.1

Recommended Use Model

Figure 72. Recommended Command Sequence

Figure 73. Power Loss Sequence

10.2.2.4.1.1

Initialization Sequence

Use the following sequence to power-up and initialize the device:

1. Hold all digital inputs low and ramp up AVDD/DVDD to at least 3 V.

2. Initialize digital inputs and PVDD supply as follows:

–

Drive RST = 0, PDN = 1, and other digital inputs to their desired state while ensuring that all are never

more than 2.5 V above AVDD/DVDD. Wait at least 100 µs, drive RST = 1, and wait at least another 13.5

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