# FH2120-NB

**鑫飞宏** · Battery Management · SOT-23-6

FH2120-NB from 鑫飞宏, in a SOT-23-6. 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 | DO | output | Gate connection terminal for the discharge-control MOSFET; the output swings between VSS-0.3 V and VDD+0.3 V as an absolute maximum, with high level VDD-0.1 V to VDD-0.02 V and low level 0.5 V max. |
| 2 | CO | output | Gate connection terminal for the charge-control MOSFET; the output swings between VDD-28 V and VDD+0.3 V as an absolute maximum, with high level VDD-0.1 V to VDD-0.02 V and low level 0.5 V max. |
| 3 | VM | input | Overcurrent detection and charger detection terminal; its input voltage is limited to VDD-28 V to VDD+0.3 V. |
| 4 | VC | input | Connection between the negative terminal of cell 1 and the positive terminal of cell 2, used for voltage sensing; it must stay within the VDD-VC and VC-VSS input range of -0.3 V to +6.0 V. |
| 5 | VDD | power_in | Positive power supply input and connection to the positive terminal of cell 1; the operating voltage range VDD-VC/VC-VSS is -0.3 V to 6 V and VDD-VM is 1.5 V to 28 V. |
| 6 | VSS | power_in | Ground and negative power supply input, also connected to the negative terminal of cell 2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | 鑫飞宏 |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 工作电压 (VDD-VC, VC-VSS) | VOP1 | -0.3 |  | 6 | V |  | 6 |
| 工作电压 (VDD-VM) | VOP2 | 1.5 |  | 28 | V |  | 6 |
| 正常工作电流 | IDD |  | 5 | 9 | μA | V1=V2=3.5V,VVM=0V | 6 |
| 过放电流 | IOPED |  | 3 | 6 | μA | V1=V2=1.5V,VVM=3V | 6 |
| 过充电保护电压 (tolerance) | VOC | -0.025 |  | 0.025 | V |  | 6 |
| 过充电解除电压 (tolerance) | VOCR | -0.05 |  | 0.05 | V |  | 6 |
| 过放电保护电压 (tolerance) | VOD | -0.08 |  | 0.08 | V |  | 6 |
| 过放电解除电压 (tolerance) | VODR | -0.1 |  | 0.1 | V |  | 6 |
| 放电过流保护电压 (tolerance) | VEC | -0.03 |  | 0.03 | V | VEC＞0.100V | 6 |
| 短路保护电压 (tolerance) | VSHORT | -0.2 |  | 0.2 | V |  | 6 |
| 充电过流保护电压 (tolerance) | VCHA | -0.03 |  | 0.03 | V |  | 6 |
| DO 端子输出低电压 | VDL |  | 0.2 | 0.5 | V |  | 6 |
| CO 端子输出低电压 | VCL |  | 0.2 | 0.5 | V |  | 6 |
| 充电器起始电压（允许向 0V 电池充电功能） | V0CH | 1.2 |  |  | V | 允许向0V电池充电功能 | 6 |
| 过充电保护延时 (delay code A) | TOC |  | 1000 |  | ms | Delay code A; printed as TOC*60% min and TOC*140% max | 4 |
| 过放电保护延时 (delay code A) | TOD |  | 128 |  | ms | Delay code A; printed as TOD*60% min and TOD*140% max | 4 |
| 放电过流延时 (delay code A) | TEC |  | 10 |  | ms | Delay code A; printed as TEC*60% min and TEC*140% max | 4 |
| 充电过流延时 (delay code A) | TCHA |  | 8 |  | ms | Delay code A; printed as TCHA*60% min and TCHA*140% max | 4 |
| 短路延时 (delay code A) | TSHORT |  | 250 |  | μs | Delay code A; printed as TSHORT*60% min and TSHORT*140% max | 4 |
| VDD and VC, VC and VSS 之间输入电压 | VDD-VC, VC-VSS | -0.3 |  | 6 | V |  | 5 |
| 工作温度范围 | TOPR | -40 |  | 85 | °C |  | 5 |
| 储存温度范围 | TSTG | -40 |  | 125 | °C |  | 5 |

## CAD (KiCad official)

- Symbol: `FH2120-NB`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `fh2120-nb-etched.step` / `fh2120-nb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fh2120-nb.step` / `fh2120-nb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [鑫飞宏 datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603345529535275008) (11 pp, sha256 `9ef51fe0681e9620`, 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/fh2120-nb-datasheet.pdf)