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NS4225 25W stereo Class D Audio Power Amplifier Solution Chip, include PCB. High-Quality Audio Power Amplifier. NS4225 23W stereo Class D Audio Power Amplifier Solution Chip is a cutting-edge audio amplification technology that provides a powerful and efficient solution for delivering high-quality sound output. This solution chip is designed to amplify audio signals with exceptional clarity and minimal distortion, making it ideal for various applications such as home theater systems, car audio systems, multimedia speakers, and more.
Schematic NS4225 25W High-Quality Audio Power Amplifier stereo
About IC NS4225
NS4225 is a D-class stereo audio power amplifier that does not require a filter and can output 25W per channel. NS4225 adopts advanced technology to greatly reduce EMI interference within the full bandwidth range and minimize its impact on other components. Its output, without the need for a filter, reduces external components, PCB area, and system costs. When NS4225 operates in PBTL mode, it functions as a single-channel audio amplifier.
At this time, the output driving capability is stronger, and the amplifier efficiency is higher. NS4225 has built-in overcurrent protection, overheat protection, and undervoltage protection functions, effectively protecting the chip from damage under abnormal working conditions. NS4225 is available in TSSOP-24 package and has a rated operating temperature range of -40 °C to 85 °C.
Main features:
- Output Power: 10W×2 (8 Ω load / VCC=12V / THD+N=10% / BTL mode)
- 17W×2 (4 Ω load / VCC=12V / THD+N=10% / BTL mode)
- 20W (4 Ω load / VCC=12V / THD+N=10% / PBTL mode)
- 23W×2 (8 Ω load / VCC=18V / THD+N=10% / BTL mode)
- 46W (4 Ω load / VCC=18V / THD+N=10% / PBTL mode)
- Recommended operating voltage: 6V-18V
- PBTL output function
- Filterless design
- Differential input mode
- Efficiency up to 94% (8 Ω load / VCC=12V / Po=8W×2)
- Excellent “power-on, power-off” noise suppression
- Overcurrent protection, overheat protection, undervoltage protection
- TSSOP-24 package
Application areas:
- Bluetooth speakers
- Amplifiers
- Other consumer audio devices
The NS4225 chip incorporates advanced Class D amplifier technology, which offers superior energy efficiency compared to traditional Class AB amplifiers. It efficiently converts the input audio signals into high-power output signals, enabling the reproduction of audio with remarkable fidelity and dynamic range. With a maximum power output of 23W per channel, this chip ensures an immersive audio experience for listeners.
Furthermore, the NS4225 chip is accompanied by a well-designed PCB (Printed Circuit Board) that facilitates the seamless integration of the chip into audio amplifier systems. The PCB is meticulously engineered to ensure optimal signal integrity, minimize noise interference, and maximize power efficiency. It provides a compact and reliable platform for mounting the NS4225 chip and other necessary components, enabling easy installation and maintenance.
The NS4225 23W stereo Class D Audio Power Amplifier Solution Chip, along with its accompanying PCB, offers a comprehensive audio amplification solution that combines high performance, efficiency, and ease of implementation. Whether you are designing a home entertainment system or upgrading your car’s audio setup, this solution chip provides the perfect combination of power and audio quality to elevate your listening experience to new heights.
Bom NS4225 25W stereo power amplifier circuit
| Name | Designator | Footprint | Quantity |
| Resistors | |||
| 20K (203) | R5,R2,R3,R4 | R0603 | 4 |
| 2K (202) | R6 | R0603 | 1 |
| 100K (104) | R8,R7 | R0603 | 2 |
| Capacitors | |||
| 1uf | C2 | C0402 | 1 |
| 1nf | C15,C8,C23,C24,C25,C26,C9,C12 | C0402 | 8 |
| 470uF/25V | C17,C11,C1,C14 | Electrolytic capacitor | 4 |
| 0.1u | C18,C7,C10,C13,C16 | C0603 | 5 |
| 220nf | C21,C20,C19,C6,C5,C4,C3,C22 | C0603 | 8 |
| Semiconductors | |||
| LED-0603_G | LED1 | LED0603 — Green LED | 1 |
| AO3401 | Q1 | SOT-23-3 — 30V P-Channel MOSFET | 1 |
| NS4225 | U1 | HTSSOP-24 — 23Wx2 Class D audio amplifier | 1 |
| SE8550-LF | U2 | SOT-23-3 — 250mA Fixed 5V Positive 40V | 1 |
| DSK34 | D2,D1 | 40V 3A SOD-123FL Schottky Barrier Diodes | 2 |
| Miscellaneous | |||
| 22uH (220) | L4,L3,L2,L1 | 22uH, SMD inductor,6.6×7.1 mm | 4 |
| RK097 (503) | R1 | 50K — RK097 potentiometer or equivalent | 1 |
| XH-3A | CN1 | 2.5 mm 3 pin | 1 |
| PJ-327E-5A | AUDIO1 | PJ-327E-5A | 1 |
| OUTR | J1 | 5.08 mm Screw terminal 2 pin | 1 |
| OUTL | J2 | 5.08 mm Screw terminal 2 pin | 1 |
| VCC | J3 | TEST-SMD_L3.4-P1.8 | 1 |
| GND | J4 | TEST-SMD_L3.4-P1.8 | 1 |
| SS-12D10L5 | SW1 | SS-12D10L5 — 3A Straight SPDT Slide Switches | 1 |
| DC-005-5A-2.5-SMT | DC1 | DC-005-5A-2.5-SMT — 2.5 mm 6.5 mm 2.5A 24V SMD AC/DC Power Connectors | 1 |
Download files, links, and notes
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