CD4440 LA4440 2-Channel 6W Audio Amplifier IC

CD4440 / LA4440 6W 2-Channel Audio Power Amplifier IC is a dual-channel monolithic integrated circuit designed specifically for low-frequency audio power amplification in car stereos and portable radios. This versatile chip operates effectively in two distinct modes: a dual stereo configuration producing 6W per channel or a single-channel bridge-tied load (BTL) configuration delivering up to 19W of high-impact output power. Furthermore, the built-in audio muting function and built-in protection circuitry significantly reduce external component count while preventing thermal overload and pin-to-pin short-circuit damage. Consequently, audio engineers and DIY hobbyists achieve exceptional sound fidelity with minimal pop noise at power-on. Therefore, you can effortlessly build compact, cost-effective, and high-performance sound systems with simple heatsink arrangements.

Key Features:

• Dual Operating Modes: Operates seamlessly in dual stereo mode (2 × 6W into 4 Ω) or bridged mono mode (1 × 19W into 4 Ω), providing versatile deployment options.
• Low Harmonic Distortion: Minimizes total harmonic distortion (THD ≈ 0.1% to 0.2%) to preserve clear and accurate acoustic reproduction across standard audible frequencies.
• Integrated Protection Suite: Incorporates built-in thermal shut-down protection, overvoltage protection, and load short-circuit protection against system-level failures.
• Pop Noise Suppression: Features built-in pop noise prevention circuitry that silences unwanted transients during power-up and power-down cycles.
• Minimal Component Count: Requires very few external capacitors and resistors, drastically simplifying circuit board layout and lowering assembly costs.

Technical Specifications:

• Supply Voltage Range: 9.0 V to 18.0 V DC (Typical: 12.0 V to 13.2 V DC)
• Maximum Supply Voltage: 18.0 V DC
• Output Power (Dual Mode): 6.0 W × 2 (at V_CC = 13.2 V, R_L = 4 Ω, THD = 10%)
• Output Power (BTL Mono Mode): 19.0 W (at V_CC = 13.2 V, R_L = 4 Ω, THD = 10%)
• Quiescent Current: 100 mA to 200 mA (Typical at V_CC = 13.2 V)
• Voltage Gain: 49 dB to 53 dB (Dual mode) / 45 dB to 55 dB (BTL mode)
• Total Harmonic Distortion (THD): 0.1% to 0.2% (Typical at P_OUT = 0.5 W, f = 1 kHz)
• Input Resistance: ≈ 30 kΩ
• Operating Temperature Range: -20 °C to +75 °C

Mechanical Specifications:

• Package Type: SIP-14H (Single In-line Package with Heatsink Tab, 14 Pins)
• Mounting Type: Through-Hole Mount (THD) with central heatsink mounting hole
• Tab Material: Copper-alloy tab for efficient thermal conduction to external cooling structures
• Lead Finish: Tin-plated solder pins

Dimensions:

• Body Length: ≈ 26.0 mm
• Body Height: ≈ 13.2 mm (excluding mounting tab)
• Overall Height: ≈ 19.5 mm (including mounting tab)
• Thickness: ≈ 4.5 mm
• Pin Pitch: ≈ 2.0 mm
• Mounting Hole Diameter: ≈ 3.2 mm

Pinout and Wiring:

• Pin 1 (NF1): Negative feedback terminal for Channel 1 to configure closed-loop gain.
• Pin 2 (IN1): Audio signal input terminal for Channel 1.
• Pin 3 (PRE-GND): Pre-amplifier section ground reference.
• Pin 4 (BS1): Bootstrap capacitor connection for Channel 1.
• Pin 5 (OUT1): Amplified audio power output for Channel 1.
• Pin 6 (PWR-GND): Power amplifier ground reference.
• Pin 7 (BS2): Bootstrap capacitor connection for Channel 2.
• Pin 8 (OUT2): Amplified audio power output for Channel 2.
• Pin 9 (PWR-GND): Power amplifier ground connection.
• Pin 10 (VCC): Positive DC supply voltage pin (9V to 18V).
• Pin 11 (VCC/Ripple Filter): Decoupling and ripple filter connection for clean DC power rail performance.
• Pin 12 (IN2): Audio signal input terminal for Channel 2.
• Pin 13 (NF2): Negative feedback terminal for Channel 2.
• Pin 14 (Muting): Audio mute control pin to silence audio output lines.
• Wiring Note: However, you must mount an adequately sized aluminum heatsink to the metal tab before applying continuous high-volume signals to prevent thermal throttling.

Datasheet Reference:

• Download LA4440 Datasheet

Commonly Used in:

• Automotive Audio Systems: Powering standard car cassette players, CD receivers, and 12V vehicle sound decks.
• Portable Radios & Boomboxes: Driving stereo speaker cones with high efficiency in battery-operated consumer electronics.
• DIY Amplifier Boards: Assembling custom 2.0 channel stereo desktop amplifiers and compact active subwoofer units.

Applications:

• Car Stereo Amplification: Delivers robust stereo audio from 12V automotive batteries without requiring step-up power supplies.
• Active Subwoofer Drivers: Operates in bridged BTL mono mode to deliver up to 19W to a single dedicated low-frequency woofer.
• Public Address (PA) Horns: Amplifies voice transmissions cleanly for compact mobile announcement setups and megaphone speakers.

Equivalent Models:

• LA4440: Direct pin-for-pin original manufacturer replacement by SANYO / ON Semiconductor with identical electrical parameters.
• CD4440: Standard compatible second-source version produced for high-volume audio equipment.
• TDA2005: Alternative 20W dual/bridge audio amplifier IC, although pinout configurations and package dimensions differ.

Package Includes:

• 1 x CD4440 / LA4440 6W 2-Channel Audio Power Amplifier IC (SIP-14H)