TPA3118 60W Audio Amplifier Module

TPA3118 60W Mono Digital Audio Amplifier Module

DC 12V-24V Single Channel Class D Amplifier

Cooling of the integrated circuit is mandatory during use at high wattages. Otherwise the product will be damaged.

     The TPA3118 60W Mono Audio Amplifier Module is a small single-channel (mono) Class D audio power amplifier board built with the Texas Instruments TPA3118 integrated circuit. The two output stages of the chip are bridged (PBTL) to drive a single speaker; with a 24V supply it delivers up to 60W into a 2Ω - 4Ω speaker and approximately 30W into an 8Ω speaker. It can be connected to any kind of audio output source (phone, computer, sound card, preamplifier).

     The board runs on 8V - 24V DC; a noise-free 24V 3A (75W) power supply is recommended for full performance. Thanks to its Class D design the efficiency is above 90%, so it runs much cooler than linear amplifiers of the same power. The chip includes short-circuit, overtemperature, overvoltage, undervoltage and DC fault protection.

     The board has POWER (+ / -) and OUT (+ / -) connection points on its top edge and IN (audio input) and MUTE points on its bottom edge; the points are through-hole solder pads and no terminal blocks are fitted. It is fixed in an enclosure with the mounting holes in the four corners. Compared with small amplifiers such as the 2x15W stereo PAM8610, it gives much higher power on a single channel and can be supplied with up to 24V; it suits bass speakers (subwoofers) and loud single-speaker systems.

Key features:

     Up to 60W on one channel: The two outputs of the TPA3118 are bridged (PBTL) to drive a single speaker; with a 24V supply it delivers up to 60W into a 2Ω - 4Ω speaker.

     Wide supply range: Runs on 8V - 24V DC; it can be used in 12V vehicle and battery systems as well as at full power with a 24V adapter.

     High efficiency: The Class D design gives an efficiency above 90%; most of the energy taken from the supply goes to the speaker and the board stays cool.

     Built-in protection: Short-circuit, overtemperature, overvoltage, undervoltage and DC fault protection are inside the chip; the output shuts down when a fault occurs.

     Small ready-made board: The board of about 47mm x 35mm carries the output inductors and 4 pieces of 330µF 25V capacitors; only the supply, input and speaker need to be connected.

Features:

• Product type: Single-channel (mono) Class D audio amplifier module
• Chip: TPA3118 (Texas Instruments)
• Output configuration: PBTL (bridged) single-channel output
• Output power: up to 60W (24V supply, 2Ω - 4Ω speaker); approximately 30W into 8Ω
• Speaker impedance: 2Ω - 8Ω (highest power into 2Ω - 4Ω speakers)
• Operating voltage: DC 8V - 24V (recommended 12V - 24V)
• Recommended power supply: noise-free 24V 3A (75W) for full performance
• Operating current: up to 3A
• Efficiency: above 90% (approximately 93%)
• Class: Class D
• Protection: Short-circuit and overtemperature protection
• Voltage protection: Overvoltage and undervoltage protection
• DC fault protection: The output shuts down to protect the speaker when DC voltage is detected at the output
• Connection points: POWER (+ / -), OUT (+ / -), IN (audio input), MUTE; through-hole solder pads
• On-board parts: 2 output inductors, 4 pieces of 330µF 25V electrolytic capacitors
• Board code: HW-327
• Mounting: Mounting hole in each of the 4 corners
• Material and color: Blue printed circuit board
• Dimensions: approximately 47mm x 35mm x 12mm
• Weight: approximately 12gr

Usage information:

• Solder the positive of the power supply to POWER (+) and the negative to POWER (-). A 24V 3A supply is needed for full power, a 12V supply is enough at lower power; a noise-free (well-filtered) supply directly affects the sound quality.
• Connect the speaker to OUT (+) and OUT (-). The output is bridged; both speaker wires go only to these two points, and OUT (-) must not be connected to ground (GND).
• Connect the signal and ground wires of the audio source to the two points of the IN input; the audio source and the board must share a common ground. The board is single-channel; with a stereo source one channel is used. The volume is set at the source; there is no volume potentiometer on the board.
• For long use at high power, stick a heat sink on top of the chip or provide air flow in the enclosure.

Application areas:

•  Subwoofer (bass speaker) amplifier
•  In-car additional speaker and bass system
•  Caravan sound system
•  Boat sound system
•  Public address systems for shops, schools and mosques
•  Building music boxes and portable speakers
•  Boosting computer and television speakers
•  Guitar and instrument practice amplifier
•  Reusing old speaker cabinets
   

Precautions:

•  Cooling of the integrated circuit is mandatory during use at high wattages. Otherwise the product will be damaged.
•  The supply must not exceed 24V; the capacitors on the board are rated 25V, and a higher voltage destroys the board. Do not reverse the positive and negative of the supply.
•  The speaker outputs must not be short-circuited to each other or to ground. Do not connect OUT (-) to GND.
•  60W is reached only with a 24V supply and a 2Ω - 4Ω speaker; the output power drops with 8Ω speakers (approximately 30W) and lower supply voltage. Choose the speaker power accordingly.
•  The board is single-channel (mono); two boards are needed for stereo sound.

Package contents:

•  1 Piece TPA3118 60W Mono Audio Amplifier Module
•  Note: Terminal blocks, power supply, speaker and heat sink are not included in the package.