SSM3582ACPZ-R7 datasheet(32/58 Pages) AD

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SSM3582A

Data Sheet

Rev. A | Page 32 of 58

Table 20. Fault Reporting Registers

Fault Type

Flag Set Condition

Status Reported Register

PVDD Undervoltage

PVDD below <3.6 V

5 V Regulator Undervoltage

5 V regulator voltage at AVDD < 3.6 V

Limiter/Gain Reduction Engage

Left channel limiter engaged

Right channel limiter engaged

Clipping, Left Channel

Left channel DAC clipping

Clipping, Right Channel

Right channel DAC clipping

Output Overcurrent

Left channel output current > 6 A peak

Right channel output current > 6 A peak

Die Overtemperature

Die temperature > 145°C

Die Overtemperature Warning

Die temperature > 117°C

Battery Voltage > VBAT_INF_x

Battery voltage PVDD > VBAT_INF_L

Battery voltage PVDD > VBAT_INF_R

Table 21. Register 0x16, Register 0x17, Fault Recovery

Fault Type

Flag Set Condition

Status Reported Register

Overtemperature

Warning

The amount of gain reduction applied if there is an overtemperature warning

for the left channel

OTW_GAIN_L

The amount of gain reduction applied if there is an overtemperature warning

for the right channel

OTW_GAIN_R

Manual Recovery

Use to attempt manual recovery in case of a fault event

Autorecovery Attempts

When autorecovery from faults is used, set the number of attempts using this bit

Undervoltage

Recovery can be automatic or manual

Die Overtemperature

Recovery can be automatic or manual

Overcurrent

Recovery can be automatic or manual

FAULTS AND LIMITER STATUS REPORTING

The SSM3582A offers comprehensive protections against the

faults at the outputs and reporting to help with system design.

The faults listed in Table 20 are reported using the status registers.

The faults listed in Table 20 are reported in Register 0x18 and

the system.

In the event of a fault occurrence, use Register 0x17 to control

how the device reacts to the faults.

When the automatic recovery mode is set, the device attempts

to recover itself after the fault event and, in case the fault

persists, then the device sets the fault again. This process

repeats until the fault is resolved.

When the manual recovery mode is used, the device shuts

down and the recovery must be attempted using the system

microcontroller.

VBAT (PVDD) SENSING

The SSM3582A contains an 8-bit ADC that measures the

voltage of the battery voltage (VBAT) or PVDD supply. The battery

voltage information is stored in Register 0x1A as an 8-bit unsigned

format. The ADC input range is fixed internally at 3.8 V to 16.2 V.

To convert the hexadecimal value to the voltage value, use the

following steps:

1. Convert the hexadecimal value to decimal. For example, if

the hexadecimal value is 0xA9, the decimal value is 169.

2. Calculate the voltage using the following equation:

Voltage = 3.8 V + 12.4 V × Decimal Value/255

With a decimal value of 169,

Voltage = 3.8 V + 12.4 V × 169/255 = 12.02 V

LIMITER AND BATTERY TRACKING THRESHOLD

CONTROL

The SSM3582A contains an output limiter that can be used to

limit the peak output voltage of the amplifier. The limiter works

on the rms and peak value of the signal. The limiter threshold,

slope, attack rate, and release rate are programmable using

and Register 0x11, Register 0x12, Register 0x13 for the right

channel. The limiter can be enabled or disabled using LIM_EN_L,

Bits[1:0] in Register 0x0E for the left channel and the

LIM_EN_R bits, Bits[1:0] in Register 0x11, for the right channel.

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