This datasheet introduces the technical specifications and usage of single-cell lithium-ion battery fuel gauge DS21904B
The PS810 is a fuel‑gauge IC designed for single‑cell lithium‑ion or lithium‑polymer batteries. It measures voltage, current, temperature and calculates state‑of‑charge, health and remaining runtime, which can be accessed via SMBus or a single‑pin serial interface.
The device integrates a PIC18 low‑power MCU, a programmable 8‑15‑bit signed A/D converter, internal regulator, flash and RAM, and offers QFN or TSSOP package options. The handbook includes hardware and software features, pin descriptions, block diagrams, application schematics and a bill of materials. This manual is written in Chinese.
| Core MCU | Embedded PIC18 low‑power MCU with 16‑bit instruction set |
|---|---|
| A/D Converter | Programmable 8‑15‑bit signed Z‑A A/D converter |
| Host Interface | SMBus (I2C) or single‑pin serial (SPS) interface |
| Flash Memory | 4 K × 16 bits |
| RAM | 512 bytes |
| Operating Temperature | -20 °C to +85 °C |
The PS810 can communicate with a host via the industry‑standard SMBus/I2C interface or a single‑pin serial (SPS) interface.
The device operates from –20 °C up to +85 °C.