TPA032D04

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS203B − DECEMBER 1999 − REVISED JUNE 2000

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Class-D amplifier faults

Table 1. Class-D Amplifier Fault Table

FAULT 0

FAULT 1

DESCRIPTION

1

1

No fault. The device is operating normally.

0

1

Charge pump under-voltage lock-out (VCP-UV) fault. All low-side transistors are turned on, shorting the load to

ground. Once the charge pump voltage is restored, normal operation resumes, but FAULT1 is still active. This is not

a latched fault, however. FAULT1 is cleared by cycling MUTE, SHUTDOWN, or the power supply.

0

0

Thermal fault. All the low-side transistors are turned on, shorting the load to ground. Once the junction temperature

drops 20°C, normal operation resumes (not a latched fault). But the FAULTx terminals are still set and are cleared

by cycling MUTE, SHUTDOWN, or the power supply.

headphone amplifier faults

The thermal fault remains active when the device is in head phone mode. This fault operation has exactly the

same as it does for the Class-D amplifier (see Table 1).

4.5 V, the head phone amplifier is re-enabled. No fault is reported to the user.

AVAILABLE OPTIONS

PACKAGED DEVICES

(DCA)

−40°C to 125°C

TPA032D04DCA

a taped and reeled part, add the suffix R to the part number (e.g.,

TPA032D04DCAR).