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Product Detailed Parameters
- Description：IC AMP CLASS AB STER 30MW 20QFN
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Class AB
- Output Type：Headphones, 2-Channel (Stereo)
- Max Output Power x Channels @ Load：30mW x 2 @ 32Ohm
- Voltage - Supply：2.7V ~ 5.5V
- Features：3D, Bass Boost, Depop, Thermal Protection, Shutdown
- Mounting Type：Surface Mount
- Supplier Device Package：20-QFN (3x3)
- Package / Case：20-WFQFN Exposed Pad
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The IS31AP4913-QFLS2-TR is a Class AB stereo headphone driver manufactured by Lumissil Microsystems. It operates on a supply voltage of 2.7V to 5.5V and delivers 30mW per channel into a 32Ω load at 1kHz with 1% THD+N. The device features an integrated charge pump, eliminating the need for output DC-blocking capacitors. Key electrical parameters include a quiescent current of 3mA to 5.5mA, shutdown current of 1µA, signal-to-noise ratio of 102dB, and output noise of 8µV. It provides -92dB PSRR and includes thermal protection.
Feature Summary
- Integrated charge pump converter eliminates the requirement for external output DC-blocking capacitors.
- Externally adjustable 3D audio enhancement via a simple RC network connected to dedicated control pins.
- Bass enhancement functionality that amplifies low-frequency input signals below a specific cutoff frequency.
- Pulse Count Control serial interface allows selection between four operating modes including basic, 3D, bass, or combined enhancement.
Applications
- Cellular handsets
- Portable gaming devices
- MP3 players
- Notebook PCs
Procurement Notes
Verify the component revision against the latest datasheet Rev. D dated March 15, 2024. Confirm the package type is QFN-20 (3mm x 3mm) and ensure the ordering suffix matches the required reel quantity of 2500 units. Check RoHS compliance status as specified in the manufacturer documentation before finalizing procurement orders.
Selection Notes
Select this component for portable electronics requiring high-fidelity audio with reduced bill of materials due to capacitor-free outputs. Ensure PCB layout strictly separates Signal Ground (SGND) and Power Ground (PGND) traces back to decoupling capacitors to maintain specified noise and THD performance levels.
Part Context
This part belongs to the IS31AP4913 series of stereo headphone drivers designed for small portable electronics where size and cost are primary concerns. It utilizes a Pulse Count Control interface for mode selection and integrates thermal protection circuitry alongside click-and-pop suppression for improved user experience during power transitions.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation.
FAQ
How is the operating mode selected?
The operating mode is controlled by the Pulse Count Control serial interface, which records rising edges on the CTRL pin to select between four modes: basic operation, 3D enhancement, bass enhancement, or both.
What is the purpose of the SGND and PGND pins?
The Signal Ground (SGND) and Power Ground (PGND) pins must be routed separately back to the decoupling capacitor to ensure proper device operation and meet noise and THD specifications.
