# NS4110B

**Shenzhen Nsiway Tech** · Audio Amplifiers · eSOP-8

NS4110B from Shenzhen Nsiway Tech, in a eSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CTRL | input | Mode control pin: below 0.5 V the amplifier is in low-power shutdown, 0.9 V to 1.5 V selects Class AB, and 2 V to 5 V selects Class D (absolute maximum CTRL voltage 0 V to 5 V). |
| 2 | BYPASS | passive | Connection for an external decoupling capacitor on the internal reference voltage. |
| 3 | INP | input | Positive amplifier input; the voltage gain is set by the external input resistor Ri, with Av = 300k/Ri and the internal 300k feedback resistor specified to ±10%. |
| 4 | INN | input | Negative amplifier input; the voltage gain is set by the external input resistor Ri, with Av = 300k/Ri and the internal 300k feedback resistor specified to ±10%. |
| 5 | VON | output | Negative output terminal of the speaker driver, which connects to the load together with VOP. |
| 6 | VDD | power_in | Power supply input; the recommended operating voltage is 6 V to 14 V (12 V typical) and the absolute maximum input range is 6 V to 14 V. |
| 7 | GND | power_in | Power ground for the device. |
| 8 | VOP | output | Positive output terminal of the speaker driver, which connects to the load together with VON. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Nsiway Tech |
| Package | eSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 9 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Recommended supply voltage | VDD | 6 | 12 | 14 | V |  | 4 |
| Input voltage range |  | 6 |  | 14 | V |  | 3 |
| CTRL pin voltage range |  | 0 |  | 5 | V |  | 3 |
| ESD voltage |  | 2000 |  |  | V | printed as >2000V | 3 |
| Operating temperature range |  | -45 |  | 85 | ℃ |  | 3 |
| Storage temperature range |  | -55 |  | 150 | ℃ |  | 3 |
| Maximum junction temperature |  |  |  | 150 | ℃ |  | 3 |
| Soldering temperature |  |  |  | 260 | ℃ | 10 s | 3 |
| Internal feedback resistor tolerance |  | -10 |  | 10 | % | internal feedback resistor 300k, maximum deviation | 8 |
| Shutdown leakage current | ISD | 0 | 0.1 | 1 | µA | VCTRL = 0V | 4 |
| Class D mode CTRL voltage threshold | VClassD | 2 | 3.3 | 5 | V |  | 4 |
| Class AB mode CTRL voltage threshold | VClassAB | 0.9 | 1.2 | 1.5 | V |  | 4 |
| Shutdown mode CTRL voltage threshold | VSD | 0 | 0.2 | 0.5 | V |  | 4 |
| Internal feedback resistor |  |  | 300 |  | kΩ |  | 8 |
| Quiescent current | IDD |  | 4 |  | mA | VDD=9V, CLASS AB | 4 |
| Quiescent current | IDD |  | 15 |  | mA | VDD=9V, CLASS D | 4 |
| Quiescent current | IDD |  | 17 |  | mA | VDD=12V, CLASS D | 4 |
| Output offset voltage | VOS |  | 5 |  | mV | VIN=0V, Gain=20dB | 4 |
| Power supply rejection ratio | PSRR |  | -85 |  | dB | 217Hz | 4 |
| Power supply rejection ratio | PSRR |  | -82 |  | dB | 20kHz | 4 |
| Common-mode rejection ratio | CMRR |  | -80 |  | dB |  | 4 |
| Modulation frequency | fSW |  | 440 |  | kHz |  | 4 |
| Efficiency | η |  | 92 |  | % | VDD=12V, RL=8Ω | 4 |
| Efficiency | η |  | 85 |  | % | VDD=12V, RL=4Ω | 4 |
| Mode switching time | tMOD |  | 0.1 |  | ms |  | 4 |
| Total harmonic distortion plus noise | THD+N |  | 0.03 |  | % | Gain=20dB, f=1kHz, RL=8Ω, PO=1W | 4 |
| Signal-to-noise ratio | SNR |  | -92 |  | dB | Gain=20dB, f=1kHz, RL=8Ω, VDD=12V, PO=10W | 4 |
| Overtemperature protection threshold | OTP |  | 160 |  | ℃ |  | 4 |
| Overtemperature hysteresis | OTH |  | 20 |  | ℃ |  | 4 |
| Output power | PO |  | 5.5 |  | W | VDD=7.4V, THD=1%, f=1kHz, CLASS D, RL=4Ω | 5 |
| Output power | PO |  | 7 |  | W | VDD=7.4V, THD=10%, f=1kHz, CLASS D, RL=4Ω | 5 |
| Output power | PO |  | 8 |  | W | VDD=9.0V, THD=1%, f=1kHz, CLASS D, RL=4Ω | 5 |
| Output power | PO |  | 10 |  | W | VDD=9.0V, THD=10%, f=1kHz, CLASS D, RL=4Ω | 5 |
| Output power | PO |  | 6 |  | W | VDD=9.0V, THD=10%, f=1kHz, CLASS D, RL=8Ω | 5 |
| Output power | PO |  | 15 |  | W | VDD=12V, THD=1%, f=1kHz, CLASS D, RL=4Ω | 5 |
| Output power | PO |  | 18 |  | W | VDD=12V, THD=10%, f=1kHz, CLASS D, RL=4Ω | 5 |
| Thermal resistance junction-to-case | θJC |  | 10 |  | oC/W |  | 3 |
| Thermal resistance junction-to-ambient | θJA |  | 60 |  | oC/W |  | 3 |

## CAD (KiCad official)

- Symbol: `NS4110B`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: eSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ns4110b-etched.step` / `ns4110b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ns4110b.step` / `ns4110b.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Shenzhen Nsiway Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589839205020311552) (11 pp, sha256 `5fcb6e6f2ee73dfa`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ns4110b-datasheet.pdf)