TPA005D14

2-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS240A – AUGUST 1999 – REVISED MARCH 2000

4

POST OFFICE BOX 655303

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. FAULT1 is

cleared by cycling MUTE, SHUTDOWN, or the power supply.

1

0

Over-current fault — The output transistors are all switched off. This causes the load to be in a high-impedance state.

This is a latched fault and 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. This is latched fault and is

cleared by cycling MUTE, SHUTDOWN, or the power supply.

† These logic levels assume a pullup to PVDD from the open-drain outputs.

headphone amplifier faults

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

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

AVAILABLE OPTIONS

PACKAGED DEVICES

TA

TSSOP†

(DCA)

–40

°C to 125°C

TPA005D14DCA

† The DCA package is available in left-ended tape and reel. To order

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

TPA005D14DCAR).