The bq2002c is a low-cost cmos battery-charge controller that provides reliable charge termination for both nicd and nimh battery applications.
The bq2002C is a low‑cost CMOS fast‑charge controller for NiCd and NiMH batteries. It provides fast‑charge initiation, termination by multiple safety criteria, and pulse‑trickle charging to maintain battery voltage when idle. The device can be used in stand‑alone chargers or integrated into larger systems.
The datasheet details pin functions, electrical characteristics, recommended operating conditions, and timing parameters. It also includes absolute maximum ratings, impedance specifications, and ordering information for the 8‑pin DIP and narrow SOIC packages.
| Supply voltage (VCC) | 4.0 V – 6.0 V (typical 5.0 V) |
|---|---|
| Standby current (Isp) | ≤ 1 µA |
| Operating current (Icc) | ≤ 500 µA (outputs unloaded) |
| LED output low voltage (VOL) | ≤ 0.8 V |
| Battery input impedance (RpaT) | ≥ 50 MΩ |
| Temperature range (operating) | 0 °C – 70 °C |
Fast charge ends when any of the following occurs: peak voltage detection (PVD), negative delta voltage (‑AV), maximum voltage, maximum temperature, or maximum time.
The LED pin is an open‑drain output that goes low while fast charge is in progress and flashes during charge‑pending.
When high, the INH pin suspends fast‑charge, top‑off, and the internal charge timer, while still allowing pulse‑trickle charging.
The device is specified for a supply voltage between 4.0 V and 6.0 V, with 5.0 V typical.