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TPA3138D2

The TPA3138D2 is a 10-W per channel Class-D stereo audio amplifier from Texas Instruments. It operates from a wide 3.5-V to 14.4-V supply range and offers inductor-free operation.

✓ Total Stock: 120,533 pcs

$ Price Range: $0.63

TPA3138D2 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Romaks Technologies ✓ Non-Authorised Inventory information	120,533 pcs On Request	120533 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

TPA3138D2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	Texas Instruments

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TPA3138D2 Description

Short technical summary and product information.

The Texas Instruments TPA3138D2 is a high-efficiency, low-idle-current Class-D stereo audio amplifier designed for portable applications. It can deliver up to 10 W per channel into a 6-Ω load with 1% THD+N at a 12-V supply, or 18.5 W in mono mode into a 4-Ω load. The device operates from a wide supply voltage range of 3.5 V to 14.4 V, making it suitable for battery-powered devices.

Key features include inductor-free operation, which reduces solution size and cost, and compliance with EN55013 and EN55022 EMC standards when used without external inductors. The amplifier offers selectable gain settings of 20 dB and 26 dB, single-ended or differential analog inputs, and pop-and-click-free startup. It also integrates comprehensive protection features such as short circuit, thermal, undervoltage, and overvoltage protection with auto-recovery.

The TPA3138D2 is housed in a 28-pin HTSSOP package and is pin-to-pin compatible with TPA3110D2, TPA3136D2, and TPA3136AD2, facilitating upgrades in existing designs. Its high efficiency (greater than 90%) and low idle current (20 mA at 12 V in 1SPW mode) contribute to longer battery life in portable and battery-powered audio equipment.

TPA3138D2 Quick Information

Product Type: Class-D Audio Amplifier

Canonical Name: TPA3138D2 Class-D Stereo Speaker Amplifier

Subcategory: Class-D Amplifier

TPA3138D2 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

TPA3138D2 Estimated Pricing

Qty	Low	High
1+	$0.63	$0.63

Estimated market price range - modelled values for guidance only, not live distributor offers.

TPA3138D2 Features

10-W stereo or 18.5-W mono output power.
Wide 3.5-V to 14.4-V supply voltage range.
High Class-D efficiency greater than 90%.
Inductor-free operation reduces solution size.
Integrated protection and auto-recovery features.

TPA3138D2 Applications

Ideal for Bluetooth and wireless speakers.
Suitable for smart appliance audio.
Used in consumer audio equipment.
Applicable for IoT audio speakers.

TPA3138D2 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the supply voltage range of the TPA3138D2?

The TPA3138D2 operates from 3.5V to 14.4V.

What package is the TPA3138D2 available in?

The TPA3138D2 is available in a 28-pin HTSSOP package with body size 9.70mm x 4.40mm.

What is the operating temperature range?

The operating temperature range is -40°C to 85°C.

What output power can the TPA3138D2 deliver?

It delivers 10W stereo into 6Ω at 1% THD+N, and 18.5W mono into 4Ω at 10% THD+N.

What is the efficiency of the TPA3138D2?

The Class-D efficiency is greater than 90%.

What is the typical THD+N?

Typical THD+N is 0.04% at 1W into 6Ω with 1kHz input.

How is the gain configured?

Gain is selectable between 20dB and 26dB via the GAIN_SEL pin.