Specification sheet for the BYD BM3451‑T16 4‑cell battery protection IC.
The BM3451‑T16 is a dedicated 4‑cell rechargeable‑battery protection IC with high‑precision voltage detection and integrated over‑charge, over‑discharge, over‑current, short‑circuit and temperature protection functions. It is intended for use in power tools, vacuum cleaners and small UPS backup power supplies.
The document provides detailed pin descriptions, absolute maximum ratings, electrical characteristics, operation modes, timing diagrams and package dimensions for the TSSOP‑16 version of the device.
| Package | TSSOP‑16 |
|---|---|
| Operating Temperature Range | -40 °C to 85 °C |
| Supply Voltage (VCC) Range | 5 V – 30 V |
| Typical Operating Current | 25 µA |
| Sleep Current | 6 µA |
| Maximum CO Pin Voltage | GND‑20 V to VCC+0.3 V |
| Maximum DO Pin Voltage | GND‑0.3 V to VCC+0.3 V |
| Number of Cells Protected | 4 cells |
CO is the charge‑control MOS gate output pin; it can output a high level or high‑impedance state up to 12 V.
The device operates from –40 °C to 85 °C.
It is designed to protect a 4‑cell rechargeable battery pack.
VCC may be between 5 V and 30 V.