BQ2002F
NiCd/NiMH battery charge controller with negative dV, PVT and Top-Off Time setup2
BQ2002F
- Fast charge of nickel cadmium or nickel-metal hydride batteries
- Direct LED output displays charge status
- Fast-charge termination by -V, maximum voltage, maximum temperature, and maximum time
- Internal band-gap voltage reference
- Optional top-off charge
- Selectable pulse trickle charge rates
- Low-power mode
- 8-pin 300-mil DIP or 150-mil SOIC
The bq2002 and bq2002/F Fast-Charge ICs are low-cost CMOS battery-charge controllers providing reliable charge termination for both NiCd and NiMH battery applications. Controlling a current-limited or constant-current supply allows the bq2002/F to be the basis for a cost-effective stand-alone or system-integrated charger. The bq2002/F integrates fast charge with optional top-off and pulsed-trickle control in a single IC for charging one or more NiCd or NiMH battery cells.
Fast charge is initiated on application of the charging supply or battery replacement. For safety, fast charge is inhibited if the battery temperature and voltage are outside configured limits.
Fast charge is terminated by any of the following:
- Peak voltage detection (PVD)
- Negative delta voltage (-V)
- Maximum voltage
- Maximum temperature
- Maximum time
After fast charge, the bq2002/F optionally tops-off and pulse-trickles the battery per the pre-configured limits. Fast charge may be inhibited using the INH pin. The bq2002/F may also be placed in low-standby-power mode to reduce system power consumption.
The bq2002F differs from the bq2002 only in that a slightly different set of fast-charge and top-off time limits is available.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | NiCD/NiMH Fast-Charge Management ICs datasheet (Rev. A) | 20 Apr 2009 | |
User guide | bq2002 Selection Table | 30 Aug 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
SOIC (D) | 8 | Ultra Librarian |
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