on November 16th 116

LA4440 Power Amplifier: Pinout, Circuit Diagram, and Specifications

The LA4440 audio power amplifier is a versatile and powerful chip that stands out for its great sound quality and flexibility. It’s a popular pick for both stereo and bridge setups, delivering 6 watts per channel in stereo mode and up to 19 watts in bridge mode. This makes it perfect for a wide range of audio needs. In this article, we’ll explore the LA4440’s pin layout, key features, and uses, giving you a clear and simple look at how it works and what it can do.

Catalog

Overview of the LA4440

The LA4440 stands out as a versatile dual-channel audio power amplifier, praised for its efficient performance across both stereo and bridge amplifier configurations. It garners appreciation in numerous audio applications, delivering up to 6 watts per channel for standard use. For situations with heightened audio demands, it boosts output to as much as 19 watts in bridge mode. The bridge mode operation of the LA4440 is beneficial for situations demanding higher power output. By merging the output of two channels, this mode effectively amplifies the power, reaching up to 19 watts. This makes it ideal for larger audio installations or scenarios necessitating substantial sound projection, such as public address systems and live events.

Pin Configuration of LA4440

Pin No.	Pin Name
1	NF1
2	IN 1
3	Preamp. GND
4	Audio Muting
5	DC
6	IN2
7	NF2
8	Power AMP GND2
9	B.S2
10	OUT2
11	Vcc
12	OUT1
13	B.S1
14	Power AMP GND1

LA4440 Symbol, Footprint, and CAD Model

LA4440 Technical Specifications

Technical details, characteristics, and specifications of the LA4440, including components with equivalent specifications to the ON Semiconductor LA4440J-E.

Type	Parameter
Factory Lead Time	10 Weeks
Package / Case	14-SIP
Pbfree Code	yes
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Voltage - Supply	13.2V
Output Type	2-Channel (Stereo)
Mounting Type	Through Hole
Operating Temperature	-20°C~75°C TA
Part Status	Active
Type	Class AB
Reach Compliance Code	compliant
Max Output Power x Channels @ Load	6W x 2 @ 4 Ω

Block Diagram of the LA4440

Features of the LA4440

• Dual-channel capability for stereo (6W each) or bridge (19W) modes.

• Minimal external components needed.

• Low pop noise at power on/off and stable startup.

• Good ripple rejection at 46dB.

• Effective channel separation.

• Low residual noise.

• Low distortion across various frequencies.

• Simplified heat sink design.

• Built-in audio mute function.

• Safety features include thermal, overvoltage, and pin short protection.

LA4440 IC Applications

Within home theater systems, the LA4440 IC enriches the audio by delivering high-fidelity sound. It magnifies the depth and richness of audio, aligning it seamlessly with visuals to heighten viewer immersion. This creates a captivating environment where the vivid soundtrack enhances the emotional impact of the visual narrative. For those crafting personalized home theaters, integrating the circuit with speakers and amplifiers is need to achieving optimum sound performance. The IC's capability to minimize distortion at elevated volumes helps in preserving sound integrity, overcoming common challenges in home audio setups.

In the automotive arena, the LA4440 is celebrated for its reliability and performance amid diverse environmental conditions, including temperature shifts and vehicle vibrations. This robust design ensures consistent audio output within the challenging confines of a car interior. Successfully employing the IC in automotive audio systems involves strategic speaker placement to maximize sound distribution. The LA4440 IC is integral to achieving superior sound quality.

Dual 6W Stereo Amplifier Circuit with LA4440 IC

The 6W+6W stereo amplifier uses the LA4440 IC to amplify audio for two speakers (left and right), each delivering 6 watts of power. The circuit is powered by a +12V DC supply connected to pin 11 of the IC, with a filter capacitor (C12) to stabilize the voltage. The left speaker (LS1) is connected to pin 10 via capacitor C8, and the right speaker (LS2) is connected to pin 12 via capacitor C9. Audio input is fed through a 3-pin connector, with capacitors C1 and C2 linking the left and right audio inputs to pins 6 and 2 of the IC, respectively. These capacitors block DC signals, allowing only the audio signals to pass through. The IC amplifies the signals and outputs them to the speakers for stereo sound playback.

19W Bridge Amplifier Circuit with LA4440 IC

The LA4440 IC, when used in bridge mode, produces 19 watts of output power and is compatible with 4–8 ohm speakers. In bridge mode, the two channels of the IC work together to drive a single speaker with higher power. For stereo sound (19W + 19W), you need to use two identical LA4440 circuits, each driving its own speaker. Resistors R3 and R4 in the circuit control the amplifier's voltage gain and balance the input signal for the inverting amplifier configuration, ensuring proper amplification without distortion. This setup is ideal for building compact, high-power audio systems.

Package Dimensions for LA4440

LA4440 Manufacturer Information

ON Semiconductor is renowned for its innovation in developing energy-efficient power and signal management solutions, catering to a variety of industries. The company's efforts span areas such as automotive and high-performance computing, providing robust solutions like the LA4440, a reflection of their dedication to quality and sustainable development. As the thirst for processing power in high-performance computing increases, ON Semiconductor meets this challenge with products that achieve peak energy efficiency alongside superior speed and performance metrics.