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Product Detailed Parameters
- Description：IC AMP CLASS D MONO 2.9W 9UTQFN
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Class D
- Output Type：1-Channel (Mono)
- Max Output Power x Channels @ Load：2.9W x 1 @ 4Ohm
- Voltage - Supply：2.7V ~ 5.5V
- Features：AGC, Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown
- Mounting Type：Surface Mount
- Supplier Device Package：9-UTQFN (1.5x1.5)
- Package / Case：9-UFBGA
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The IS31AP2145A-UTLS2-TR is a mono, filter-less Class-D audio power amplifier with integrated automatic gain control (AGC). It delivers 2.9W into a 4Ω load at 5.0V supply voltage with 10% THD+N. The device operates on a 2.7V to 5.5V power supply range and achieves up to 90% efficiency. It features selectable AGC attack and release times via the CTRL pin, click-and-pop suppression, and low shutdown current of 0.1μA. The component is housed in a compact 1.5mm × 1.5mm UTQFN-9 package.
Feature Summary
- Integrates automatic gain control to prevent signal distortion and protect speakers from damage at high power levels.
- Employs a filter-less Class-D architecture that minimizes external component requirements while maintaining high efficiency.
- Includes thermal protection and short-circuit protection functions for robust operation under fault conditions.
Applications
- Wireless or cellular handsets and PDAs
- Portable navigation devices
- Notebook PCs
- USB speakers
Procurement Notes
Verify the specific ordering suffix UTLS2-TR against the manufacturer's official documentation to confirm lead-free status and reel quantity specifications. Ensure the selected variant matches the required industrial temperature range of -40°C to +85°C. Cross-reference the datasheet revision date to validate electrical characteristics before finalizing procurement orders.
Selection Notes
Select this amplifier for applications requiring high efficiency and minimal external components due to its filter-less design. Consider the integrated AGC functionality if speaker protection and distortion prevention are critical. Verify that the available supply voltage falls within the 2.7V to 5.5V operating range and that the load impedance matches the specified output power ratings.
Part Context
This component belongs to the IS31AP2145 series of Class-D audio amplifiers manufactured by Integrated Silicon Solution, Inc. (ISSI). The series focuses on portable audio applications where space constraints and battery life are primary concerns. The UTQFN-9 package provides a thermally enhanced solution suitable for dense PCB layouts in mobile consumer electronics.
Replacement Considerations
No public confirmed substitute part numbers are documented in the provided source material.
FAQ
How is the AGC function controlled?
The AGC function and its attack/release times are selectable via the CTRL pin using two control terminals (CTRL1 and CTRL2) to set modes such as AGC1, AGC2, AGC OFF, or Shutdown.
What is the switching frequency of the amplifier?
The switching frequency is typically 300 kHz across the full supply voltage range of 2.7V to 5.5V.
