# BCT4054DEUK-TR

**BROADCHIP** · Battery Management ICs · SOT-23-5

BCT4054DEUK-TR from BROADCHIP, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CHRG | tri_state | Open-drain charging status indicator internally pulled low during charging, in high-impedance state for all other conditions |
| 2 | GND | power_in | Ground connection |
| 3 | BAT | power_out | Battery charging connection pin with fixed charging termination voltage of 4.35V for BCT4054D variant |
| 4 | VCC | power_in | Power supply input pin; chip enters sleep mode when supply voltage falls within 80mV of BAT voltage with battery leakage current reduced to 2μA |
| 5 | PROG | input | Constant current setting and charging current monitoring pin; charging current set via external resistor RPROG to ground with formula IBAT = 1100 × VPROG / RPROG |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BROADCHIP |
| Package | SOT-23-5 |
| Category | Power Supply Chip |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `BCT4054DEUK-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `bct4054deuk-tr-etched.step` / `bct4054deuk-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bct4054deuk-tr.step` / `bct4054deuk-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BROADCHIP datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588946015332679680) (15 pp, sha256 `967a595ac3b5da65`, retrieved 2026-09-18, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/bct4054deuk-tr-datasheet.pdf)