Texas Instruments TPA005D12 manual 3.4.5Power Requirements, Details

Power Requirements

3.4.5Power Requirements

The TPA005D12 class-D stereo audio power amplifier evaluation module is designed to operate from a supply voltage between 4.5 V and 5.5 V. For best performance (highest output power with lowest distortion), the module should be operated at 5 V.

The TI plug-n-play audio amplifier evaluation platform provides several options for powering the TPA005D12 class-D EVM. Table 3±3 shows the platform jumper and switch settings for each power source option (see the User's Guide for the TI plug-n-play audio amplifier platform, TI Literature Number SLOU011 for more information). The TPA005D12 class-D EVM requires no setup for power source selection.

Table 3±3. Platform Jumper and Switch Settings for the TPA005D12 EVM Power Inputs

POWER TYPE (Note 2)	JP1	JP2	JP3	JP4	JP5	JP6	JP7	JP8	S1	S2	S3
VCC (J1)	ON	OFF	OFF	ON	ON	Mode	X	Hi	ON	Note 3	U5
AC/DC (J2)	OFF	ON	OFF	ON	ON	Mode	X	Hi	ON	Note 3	U5
Battery (B1)	OFF	OFF	ON	ON	ON	Mode	X	Hi	ON	Note 3	U5
VDD (J6)	OFF	OFF	OFF	X	ON	Mode	X	Hi	ON	Note 3	U5

Notes: 1) ON = Jumper installed, OFF = Jumper NOT Installed, X = Don't care

2)Unregulated and battery sources must have a voltage regulator EVM (SLVP097) installed in platform socket U6.

3)Set to ON when Tone Control Board SLOP109 is installed in U1, otherwise set to OFF..

Although the TPA005D12 amplifier IC draws approximately 0.7 A per channel from the power supply during continuous full power output, peak current draw can be as high as 1.15 A per channel. Any power supply connected to the platform should be capable of providing 2.3 A to avoid clipping of the output signal during voltage peaks. Current consumption driving speakers at normal listening levels is typically 0.1 A or less.

A VDD supply of 5 V is required if a signal processing EVM is installed in platform socket U1 or a separate headphone amplifier EVM is installed in U5. VDD can either be applied to the platform VDD power input terminals (J6) or a voltage regulator (SLVP097 or equiv.) can be installed in platform socket U6 to provide VDD from the platform VCC supply.

The platform is equipped with overvoltage and reverse-polarity supply voltage input protection in the form of fused crowbar circuits.

-VDD voltage applied to platform screw terminals J6 MUST NOT exceed the absolute maximum rating for the TPA005D12 amplifier IC installed on

the evaluation module (5.5 V) or damage to the IC may result. In no case

should VDD voltage of the incorrect polarity or in excess of 6.0 V be applied to screw terminals J6 of the platform, or the power protection circuit on the VDD line will trip.

-VCC voltage applied to the platform MUST NOT exceed the maximum voltage input specified for the voltage regulator module installed in socket

U6 (12 V for the SLVP097), or damage to the voltage regulator module

may result. In no case should VCC voltage applied to the platform exceed 15 V, or the overvoltage protection circuit on the VCC bus will trip.

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