TAS5802PWPR datasheet(36/106 Pages) TI2

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6.5.3.2 Shutdown Procedures

1. The device is in normal operation.

2. Configure the Register DEVICE_CTRL2 Regsiter [1:0]=00 (DEEP SLEEP) via the I2C control port or Pull

PDN low.

3. The clocks can now be stopped and the power supplies brought down.

4. The device is now fully shutdown and powered off.

6ms

0ms

PDN

PVDD

DVDD

4.5V

0ms

Output Hiz

6ms

Before PVDD/DVDD power down, Class D Output driver needs to be disabled by PDN or by I2C.

At least 6ms delay needed based on: LRCLK (Fs) = 48kHz, digital volume =24dB, digital volume ramp down by 0.5dB every sample

period. Changing the value of DIG_VOL_CTRL2 or DIG_VOL_CTRL3 registers or changing the or change the LRCLK rate will change

the delay time.

Figure 6-17. Power down sequence

6.5.3.3 Protection and Monitoring

6.5.3.3.1 Overcurrent Shutdown (OCSD)

Under severe short-circuit event, such as a short to PVDD or ground, the device uses a peak-current detector,

and the affected channel shuts down in < 100 ns if the peak current are enough. The shutdown speed depends

on a number of factors, such as the impedance of the short circuit, supply voltage, and switching frequency. The

user may restart the affected channel via I2C. An OCSD event activates the fault pin, and the I2C fault register

saves a record. If the supply or ground short is strong enough to exceed the peak current threshold but not

severe enough to trigger the OCSD, the peak current limiter prevents excess current from damaging the output

FETs, and operation returns to normal after the short is removed.

6.5.3.3.2 DC Detect

If the TAS5802 device measures a DC offset in the output voltage, the FAULTZ line is pulled low and the OUTxx

outputs transition to high impedance, signifying a fault.

6.5.3.3.3 Device Over Temperature Protection

Once the die temperature exceed 160°C (Typical), device will set the output driver from Play mode to Hi-Z

Mode. Over temperature shutdown fault reported by GLOBAL_FAULT2 Register (Offset = 72h) [Reset = 00h] in

Book0/Page0. Set this fault's behavior to Auto-recovery mode, device will come back to play mode automatically

once the die temperature drop down to 150°C or device needs re-enter into play mode by clearing fault with

FAULT_CLEAR Register (Offset = 78h) [Reset = 00h] in Book0/Page0.

TAS5802

SLASFB7A – NOVEMBER 2024 – REVISED AUGUST 2025

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