DS2784 is a lithium-ion battery management chip that operates from 2.5V to 4.6V. It supports a single lithium-ion cell or lithium-ion polymer cell. The chip can provide accurate output voltage, temperature and current measurements, and use SHA-1 algorithm and challenge-response authentication mechanism to ensure battery safety. At the same time, the chip also provides 16 bytes of EEPROM storage space for storing battery compensation data and application parameters, which can be used for battery batch and date tracking, or storing system or battery usage statistics. The chip also supports 1-Wire interface, providing 16kbps or 143kbps serial communication to access data registers, control registers and user memory. 1-Wire communication also supports challenge-response battery authentication, using SHA-1 as the hash algorithm, to implement a hash-based message authentication code (HMAC) authentication protocol.
The DS2784 operates from 2.5 V to 4.6 V and provides precise voltage, temperature, and current measurements for single‑cell lithium‑ion or lithium‑polymer batteries. It includes a built‑in Li+ safety circuit, 32‑byte parameter EEPROM, 16‑byte user EEPROM, and a 1‑Wire® serial interface that also supports SHA‑1 challenge‑response authentication.
The device is offered in a 14‑pin TDFN (3 mm × 5 mm) package and supports both active and sleep power modes. Electrical specifications such as continuous sink currents, temperature range, and protection thresholds are detailed in the datasheet for designers integrating the IC into battery packs.
| Supply Voltage Range (Vpp) | 2.5 V to 4.6 V |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 14‑Pin TDFN (3 mm × 5 mm) |
| Parameter EEPROM Size | 32 bytes |
| User EEPROM Size | 16 bytes |
| Continuous Sink Current (PIO, DQ) | 20 mA |
The DS2784 operates from 2.5 V to 4.6 V.
It works from –40 °C up to +85 °C.
The DS2784 provides 16 bytes of user EEPROM.
It uses a 1‑Wire® serial interface for data and authentication.