This file introduces the function and characteristics of the DS2715 NiMH battery pack charge controller, including: charging 1 to 10 NiMH cells in series, charging current regulation, charge mode selection, and charge end conditions
The DS2715 is a cost‑sensitive charge controller designed for NiMH battery packs of 1 to 10 cells in series. It can operate as a linear regulator or a switched‑mode comparator, offering FAST‑CHARGE, PRE‑CHARGE, TOPOFF, and DONE modes, with safety features such as over‑temperature, over‑voltage, and undervoltage lockout.
The document provides absolute maximum ratings, recommended operating conditions, detailed pin descriptions, block and state diagrams, and layout recommendations for the sense resistor. An open‑drain LED1 output indicates charge status, and a suspend function allows the device to be reset without removing the battery pack.
| Maximum cells | 1 to 10 NiMH cells |
|---|---|
| Fast‑charge rate | up to 2 C |
| Package | 16‑Pin SO |
| Supply voltage range (Vpp) | -0.3 V to +18 V |
| LED1 output | Open‑drain indicator of charge state |
| Operating temperature range | -20 °C to +85 °C |
| Idle current (linear mode) | 1.3 mA (typ) |
The DS2715 can charge between 1 and 10 NiMH cells in series.
Fast‑charge is terminated by the dT/dt technique, which monitors the temperature rise and ends charging when the rate exceeds 0.5 °C per minute.
Pin 9 (MODE) selects linear mode when connected to Vgg and comparator mode when connected to Cgias.