Description

G1421F31UF is a stereo audio power amplifier in a 24pin TSSOP thermal pad package. It has the capability to drive 1.8W continuous RMS power into a 4Ω load per channel in Bridge-Tied Load (BTL) mode with a 5V supply voltage. With a THD smaller than 1% under the mentioned operation condition, it simplifies the audio system design in notebook applications. G1421F31UF supports Bridge-Tied Load (BTL) mode for driving speakers and Single-End (SE) mode for driving headphones. It can also support a DC value to the phone-jacket and drive headphones without the need for audio amplifier output coupling capacitors. The output can be muted when Mute-In is activated, and the device can be disabled using the SHDN mode for low current consumption applications, reducing it to below 5µA.

Specifications and features

• Depop Circuitry Integrated
• Output Power at 1% THD+N, VDD=5V:
     - 1.8W/CH (typical) into a 4Ω Load
     - 1.2W/CH (typical) into an 8Ω Load
• Eliminates Headphone Amplifier Output Coupling Capacitors
• Maximum Output Power Clamping Circuitry Integrated
• Modes Supported: Bridge-Tied Load (BTL), Single-Ended (SE), and Stereo Headphone Amplifier (HP-IN)
• Stereo Input MUX
• Mute and Shutdown Control Available
• Surface-Mount Power Package 24-Pin TSSOP-P

Application Scenarios

• Stereo Power Amplifiers for Notebooks or Desktop Computers
• Multimedia Monitors
• Stereo Power Amplifiers for Portable Audio Systems

Comparison

- G1421F31UF has a compact package design, making it suitable for limited space applications.
- It supports various modes, including Bridge-Tied Load (BTL), Single-Ended (SE), and Stereo Headphone Amplifier (HP-IN), providing flexibility in different audio system designs.
- The device eliminates the need for headphone amplifier output coupling capacitors, simplifying the design and reducing component count.
- It has integrated depop circuitry and maximum output power clamping circuitry, ensuring high-quality audio performance.
- The ability to mute the output and the low current consumption in SHDN mode make it energy-efficient.

- G1421F31UF may not be suitable for high-power audio applications that require greater output power.
- It is designed for 5V supply voltage, limiting its compatibility with systems that operate at different voltage levels.
- The device is available in a surface-mount power package, which may not be compatible with all assembly methods or require additional considerations for PCB layout.