This document introduces the characteristics of DS2780 product, including voltage, temperature, current measurement, and available capacity estimation. The product is suitable for rechargeable lithium ion and lithium ion polymer batteries.
The DS2780 fuel‑gauge IC operates from 2.5 V to 5.5 V and supports single‑cell lithium‑ion and lithium‑polymer batteries. It measures voltage, temperature and current, stores cell characteristics in on‑chip EEPROM, and estimates remaining capacity in mAh and percent.
Communication is provided via a Dallas 1‑Wire interface with standard (16 kbps) and over‑drive (140 kbps) modes, and the device includes a unique 64‑bit registration number for traceability. Two power modes (ACTIVE and SLEEP) allow the IC to conserve energy when the battery is idle.
| Operating Temperature Range | -40 °C to +85 °C |
|---|---|
| Voltage Resolution | 4.88 mV |
| Temperature Resolution | 0.125 °C |
| Current Resolution | 1.56 µV |
| EEPROM Copy Time | 10 ms |
The voltage resolution is 4.88 mV.
The temperature resolution is 0.125 °C.
The DS2780 has two power modes: ACTIVE and SLEEP.
Each device has a factory‑programmed 64‑bit registration number (8‑bit family code + 48‑bit serial number + 8‑bit CRC).