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NS4814
Public Made by Adomby adom
Shenzhen Nsiway Tech Audio Amplifiers, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownNS4814
Shenzhen Nsiway Tech · Audio Amplifiers · ESOP-8
NS4814 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 | NC | unconnected | No connection; the datasheet gives no function for this pin. |
| 2 | SW | output | Boost inductor switching node that must be connected to the inductor and to the RC snubber placed close to the SW and GND pins to damp ringing. |
| 3 | PVDD | power_out | BOOST output supply that adapts between BAT pass-through and a fixed 8.5 V boost under heavy load, with an absolute maximum of 9.5 V. |
| 4 | VON | output | Negative output of the BTL bridge driving the speaker. |
| 5 | VOP | output | Positive output of the BTL bridge driving the speaker. |
| 6 | INP | input | Positive terminal of the differential audio signal input. |
| 7 | INN | input | Negative terminal of the differential audio signal input. |
| 8 | CTRL | input | Level-set control pin selecting shutdown (≤0.6 V), Class AB (0.7-1.5 V), Class D with NCN on (1.6-2.1 V) or Class D with NCN off (2.2 V to VBAT); absolute range -0.6 V to PVDD. |
| 9 | GND | power_in | Power ground, provided on the bottom exposed pad of the ESOP8 package. |
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 |
|---|---|---|---|---|---|---|---|
| Storage temperature | -65 | 150 | oC | 2 | |||
| CTRL pin voltage | -0.6 | 2 | |||||
| PVDD pin voltage | -0.3 | 9.5 | V | 2 | |||
| ESD withstand voltage | 2000 | V | 2 | ||||
| Junction temperature | 150 | oC | 2 | ||||
| Soldering temperature | 260 | oC | 2 | ||||
| Recommended operating temperature | -40 | 85 | oC | 2 | |||
| Recommended operating voltage | 3 | 5.5 | V | 2 | |||
| Thermal resistance junction-to-case, eSOP8 | θJC | 20 | oC/W | 2 | |||
| Thermal resistance junction-to-ambient, eSOP8 | θJA | 80 | oC/W | 2 | |||
| Recommended operating voltage (BOOST section) | VBAT | 3 | 5.5 | V | 3 | ||
| BAT static current | IBAT | 4 | mA | BAT=4.2V, D 类模式 | 3 | ||
| Shutdown leakage current | ISD | 1 | µA | VCTRL =0V | 3 | ||
| Undervoltage exit threshold | VBAT_UL_OFF | 2.5 | V | BAT Rising | 3 | ||
| Undervoltage entry threshold | VBAT_UL_ON | 2 | V | BAT Falling | 3 | ||
| PVDD supply voltage (boost) | VPVDD | 8.5 | V | BOOST 升压 | 3 | ||
| Cycle-by-cycle current limit (boost switch) | ILIMIT_SW | 5 | A | BOOST 升压 | 3 | ||
| BOOST switching frequency | FSW_BOOST | 600 | kHz | 3 | |||
| Class D carrier modulation frequency | FSW_BTL | 380 | kHz | D 类 | 3 | ||
| Class D mode gain | GdB_D | 28 | dB | RIN_EX=0Ω | 3 | ||
| Class AB mode gain | GdB_AB | 22 | dB | RIN_EX=0Ω | 3 | ||
| Class AB output power | PO_AB | 1.8 | W | THD＝1%,f=1KHz,Class AB, RL=3Ω | 3 | ||
| Class AB output power | PO_AB | 1.5 | W | THD＝1%,f=1KHz,Class AB, RL=4Ω | 3 | ||
| Class AB output power | PO_AB | 2.2 | W | THD＝10%,f=1KHz,Class AB, RL=3Ω | 3 | ||
| Class D output power (NCN OFF) | PO_D | 8.5 | W | THD＝1%,f=1KHz,Class D, RL=3Ω | 3 | ||
| Class D output power (NCN OFF) | PO_D | 7.2 | W | THD＝1%,f=1KHz,Class D, RL=4Ω | 3 | ||
| Class D output power (NCN OFF) | PO_D | 10.3 | W | THD＝10%,f=1KHz,Class D, RL=3Ω | 3 | ||
| Class D output power (NCN OFF) | PO_D | 8.8 | W | THD＝10%,f=1KHz,Class D, RL=4Ω | 3 | ||
| Class D efficiency | ηD | 70 | % | RIN_EX=0Ω,THD+N=10%, RL=3Ω | 3 | ||
| Class D efficiency | ηD | 75 | % | RIN_EX=0Ω,THD+N=10%, RL=4Ω | 3 | ||
| Class AB efficiency | ηAB | 72 | % | RIN_EX=0Ω,THD+N=10%, RL=4Ω | 3 | ||
| Class D noise floor | VNOISE_D | 150 | uV | RIN_EX=0Ω, VBAT=4.2V | 4 | ||
| Class D noise floor | VNOISE_D | 100 | uV | RIN_EX=30K, VBAT=4.2V | 4 | ||
| Class AB noise floor | VNOISE_AB | 70 | uV | RIN_EX=0Ω, VBAT=4.2V | 4 | ||
| Class AB noise floor | VNOISE_AB | 45 | uV | RIN_EX=30KΩ, VBAT=4.2V | 4 | ||
| CTRL level, shutdown mode threshold voltage | VCTL_SD | 0 | 0.6 | V | 关断模式阈值电压 | 4 | |
| CTRL level, Class AB mode threshold voltage | VCTL_AB | 0.7 | 1.5 | V | AB 类工作模式阈值电压 | 4 | |
| CTRL level, Class D NCN_ON threshold voltage | VD_NCN_ON | 1.6 | 2.1 | V | D 类 NCN_ON 阈值电压 | 4 | |
| CTRL level, Class D NCN_OFF threshold voltage | VD_NCN_OFF | 2.2 | V | D 类 NCN_OFF 阈值电压 | 4 | ||
| CTRL pull-down resistance | Rd_CTRL | 300 | kΩ | 4 | |||
| Adaptive boost threshold input voltage | VIN_RMS_BT | 30 | mVRMS | RIN_EX=0Ω | 4 | ||
| Adaptive boost threshold input voltage | VIN_RMS_BT | 65 | mVRMS | RIN_EX=30kΩ | 4 | ||
| NCN start time | TNCN | 30 | ms | NCN 启动时间 | 4 | ||
| NCN release time | TNCN | 125 | ms | NCN 释放时间 | 4 | ||
| Adaptive boost exit time | TPVDD_EXIT | 6 | s | 4 | |||
| Startup time from shutdown to operating mode | TSD_OFF | 90 | ms | 关断模式切入工作模式 | 4 |
CAD (KiCad official)
- Symbol:
NS4814 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
ns4814-etched.step/ns4814-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ns4814.step/ns4814.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shenzhen Nsiway Tech datasheet (10 pp, sha256
78ba2fa43f7341d6, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).