TPA3116D2EVM

1. Description

The TPA3116D2EVM evaluation module (EVM) demonstrates the TPA3116D2EVM integrated circuit Texas Instruments (TI). TPA3116D2EVM is a 50W (per channel), high-efficiency, stereo, digital amplifier power stage, used to drive two Bridge speakers or a single parallel bridged load. TPA3116D2EVM can drive with The impedance is as low as 3.2Ω (typical value is 4Ω). TPA3116D2EVM is available in 32-pin TSSOP package

2. Electrostatic Discharge Warning

Many of the components on the TPA3116D2EVM are susceptible to damage by electrostatic discharge (ESD). Users are advised to observe proper ESD handling precautions when unpacking and handling the EVM, including the use of a grounded wrist strap at an approved ESD workstation.

3. Power Supply Setup

A single power supply is required to power up the EVM. Because most of the pins are PVCC compliant, the PVCC supply also can be used to power the analog supply (AVCC) and can be used to pull up the logic pins for shutdown (SD) control and fault detection (FAULT). GVDD is an internally generated supply for the output FETs and also is used to power the PLIMIT voltage divider circuit on the EVM. PLIMIT is GVDD compliant, but not PVCC compliant. PLIMIT also can be powered by an external supply connected to the PLIMIT pin.

4. Inputs and Outputs

1. For a BTL configuration, connect a load(s) across the outputs (LEFT+ and LEFT–) and (RIGHT+ and RIGHT–). For PBTL configuration, connect a single load from one of the left-speaker jacks to one of the right-speaker jacks, depending on how the filters are loaded.

2. Connect audio inputs, either differential or single-ended, to the LIN and RIN RCA phonograph (phono) plugs for BTL operation. For PBTL operation, apply a single input, differential or single-ended, to the RIN RCA phono plug and tie INPL and INNL directly to Ground (without capacitors).

5. Short-Circuit Protection and Automatic Recovery Feature

The TPA3116D2 family has protection from overcurrent conditions caused by a short circuit on the output stage. The short circuit protection fault is reported on the FAULTZ pin as a low state. The amplifier outputs are switched to a high impedance state when the short circuit protection latch is engaged. The latch can be cleared by cycling the SDZ pin through the low state. If automatic recovery from the short circuit protection latch is desired, connect the FAULTZ pin directly to the SDZ pin. This allows the FAULTZ pin function to automatically drive the SDZ pin low which clears the short circuit protection latch. In systems where the possibility of a permanent short from the output to PVDD or to a high voltage battery (like a car battery) can occur; pull the MUTE pin low with the FAULTZ signal and an inverting transistor to ensure a high-Z restart. Please refer to the datasheet (SLOS708) for the application circuit.