# BL6306MM

**BL Shanghai Belling** · Audio Amplifiers · MSOP-8

BL6306MM from BL Shanghai Belling, in a MSOP-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 | SDB | input | Shutdown terminal, active low: VSDIH is 1.3 V minimum and VSDIL is 0.4 V maximum, with a 300 kΩ resistance from SDB to GND. |
| 2 | NC | unconnected | No internal connection. |
| 3 | IN+ | input | Positive differential input with 150 kΩ typical input impedance (135 to 165 kΩ), which can be biased from 0.5 V to VDD − 0.8 V without an input coupling capacitor. |
| 4 | IN- | input | Negative differential input; the datasheet recommends 1% tolerance input resistors or better to keep CMRR, PSRR and distortion performance optimized. |
| 5 | VO+ | output | Positive BTL output that drives the speaker together with VO-. |
| 6 | VDD | power_in | Power supply, 2.5 V to 5.5 V, to be decoupled with a low-ESR ceramic CS of 2 µF placed as close as possible to the VDD pin. |
| 7 | PGND | power_in | Power ground for the output stage. |
| 8 | VO- | output | Negative BTL output that drives the speaker together with VO+. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | MSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage |  | -0.3 |  | 6 | V |  | 4 |
| Input Voltage |  | -0.3 |  |  | V | upper limit printed as VDD+0.3V | 4 |
| Storage Temperature |  | -65 |  | 150 | ℃ |  | 4 |
| Operating Temperature Range |  | -40 |  | 85 | ℃ |  | 4 |
| Supply Voltage (wide supply range) |  | 2.5 |  | 5.5 | V |  | 1 |
| Shutdown Current | ISD |  | 0.4 | 2 | uA | VIN=0V, VSDB=0V, No Load | 4 |
| Quiescent Current | IQ |  | 2.2 | 3.2 | mA | VDD = 2.5V, VIN = 0V, No Load | 4 |
| Quiescent Current | IQ |  | 3.8 | 8 | mA | VDD = 5.5V, VIN = 0V, No Load | 4 |
| Output Offset Voltage | VOS |  | 2 | 25 | mV | VIN = 0V, AV = 2V/V, VDD = 2.5V to 5.5V | 4 |
| Modulation frequency | FSW | 200 | 250 | 300 | kHz | VDD = 2.5V to 5.5V | 4 |
| Input impedance | ZI | 135 | 150 | 165 | kΩ |  | 4 |
| Shutdown Voltage Input High | VSDIH | 1.3 |  |  | V |  | 4 |
| Shutdown Voltage Input Low | VSDIL |  |  | 0.4 | V |  | 4 |
| Quiescent Current | IQ |  | 2.6 |  | mA | VDD = 3.6V, VIN = 0V, No Load | 4 |
| Power Supply Rejection Ratio | PSRR |  | -75 |  | dB | VDD = 2.5V to 5.5V | 4 |
| Common Mode Rejection Ratio | CMRR |  | -68 |  | dB | VDD = 2.5V to 5.5V, VIC = VDD/2 to 0.5V, VIC = VDD/2 to VDD - 0.8V | 4 |
| Resistance from SDB to GND | RSDB |  | 300 |  | kΩ |  | 4 |
| Wake-up time from shutdown | TWU |  | 32 |  | mS | VDD = 3.6V | 4 |
| Drain-Source resistance (on-state) | rDS(on) |  | 700 |  | mΩ | VDD = 2.5V | 4 |
| Drain-Source resistance (on-state) | rDS(on) |  | 500 |  | mΩ | VDD = 3.6V | 4 |
| Drain-Source resistance (on-state) | rDS(on) |  | 400 |  | mΩ | VDD = 5.5V | 4 |
| Output Power | PO |  | 2.6 |  | W | VDD = 5V, THD+N=10%, f=1KHz, RL = 4Ω | 5 |
| Output Power | PO |  | 2.1 |  | W | VDD = 5V, THD+N=1%, f=1KHz, RL = 4Ω | 5 |
| Output Power | PO |  | 1.6 |  | W | VDD = 5V, THD+N=10%, f=1KHz, RL = 8Ω | 5 |
| Output Power | PO |  | 1.3 |  | W | VDD = 5V, THD+N=1%, f=1KHz, RL = 8Ω | 5 |
| Total Harmonic Distortion + Noise | THD+N |  | 0.21 |  | % | VDD = 5V, Po=1.0Wrms, f=1kHz, RL = 8Ω | 5 |
| Signal-to-Noise ratio | SNR |  | 91 |  | dB | VDD=5V, Po=1.0Wrms, RL = 8Ω | 5 |
| Output Power | PO |  | 1.35 |  | W | VDD = 3.6V, THD+N=10%, f=1KHz, RL = 4Ω | 5 |
| Output Power | PO |  | 1.08 |  | W | VDD = 3.6V, THD+N=1%, f=1KHz, RL = 4Ω | 5 |
| Output Power | PO |  | 0.85 |  | W | VDD = 3.6V, THD+N=10%, f=1KHz, RL = 8Ω | 5 |
| Output Power | PO |  | 0.69 |  | W | VDD = 3.6V, THD+N=1%, f=1KHz, RL = 8Ω | 5 |
| Supply ripple rejection ratio | KSVR |  | -65 |  | dB | VDD = 3.6V, input ac-grounded with CI = 2uF, f=217Hz, V(Ripple)=200mVPP | 5 |
| Output voltage noise (no weighting) | Vn |  | 100 |  | uVRMS | VDD = 3.6V, input ac-grounded with CI = 2uF, f=20~20kHz, No weighting | 5 |
| Output voltage noise (A weighting) | Vn |  | 75 |  | uVRMS | VDD = 3.6V, input ac-grounded with CI = 2uF, f=20~20kHz, A weighting | 5 |
| Common Mode Rejection Ratio | CMRR |  | -70 |  | dB | VDD = 3.6V, VIC = 1 VPP, f=217Hz | 5 |
| Output Power | PO |  | 0.6 |  | W | VDD = 2.5V, THD+N=10%, f=1KHz, RL = 4Ω | 5 |
| Output Power | PO |  | 0.51 |  | W | VDD = 2.5V, THD+N=1%, f=1KHz, RL = 4Ω | 5 |
| Output Power | PO |  | 0.4 |  | W | VDD = 2.5V, THD+N=10%, f=1KHz, RL = 8Ω | 5 |
| Output Power | PO |  | 0.33 |  | W | VDD = 2.5V, THD+N=1%, f=1KHz, RL = 8Ω | 5 |

## CAD (KiCad official)

- Symbol: `BL6306MM`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `bl6306mm-etched.step` / `bl6306mm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bl6306mm.step` / `bl6306mm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BL Shanghai Belling datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906820592787456) (10 pp, sha256 `d8a473d0833df496`, retrieved 2026-10-19, tier: lcsc)
- **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/bl6306mm-datasheet.pdf)