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Battery charger ICs

BQ2002

ACTIVE

NiCd/NiMH battery charge controller with negative dV, PVT and Top-Off Time setup1

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Data sheet

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BQ25172 ACTIVE 0.8-A, one- to six-cell NiMH stand-alone linear charger in a QFN package Smaller solution size and more flexibility

BQ2002

ACTIVE
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Product details

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 2 Vin (max) (V) 6 Cell chemistry NiCd, NiMH Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 6 Absolute max Vin (max) (V) 7 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4 Rating Catalog Operating temperature range (°C) 0 to 70
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 2 Vin (max) (V) 6 Cell chemistry NiCd, NiMH Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 6 Absolute max Vin (max) (V) 7 Control topology Linear Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4 Rating Catalog Operating temperature range (°C) 0 to 70
SOIC (D) 8 29.4 mm² 4.9 x 6
  • 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
  • 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.

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.
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Technical documentation

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Type Title Date
* Data sheet NiCD/NiMH Fast-Charge Management ICs datasheet (Rev. A) 20 Apr 2009
User guide DV2002L2/TL2 Fast Charge Development System Control of LM317 Linear Regulator (Rev. B) 24 Nov 2010
User guide bq2002 Selection Table 30 Aug 2005

Design & development

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GUI for evaluation module (EVM)

SLVC024 — bq24715 EVM GUI Package

Supported products & hardware

Supported products & hardware

Products
Battery charger ICs
BQ2000 — Switch-mode multi-chemistry battery charger with peak voltagedetection termination BQ2000T — Switch-mode multi-chemistry battery charger with dT/dt termination BQ2002 — NiCd/NiMH battery charge controller with negative dV, PVT and Top-Off Time setup1 BQ2002C — NiCd/NiMH battery charge controller with negative dV, PVT BQ2002D — NiCd/NiMH battery charge controller with dT/dt termination BQ2002E — NiCd/NiMH battery charge controller with negative dV, PVT and tMTO setup1 BQ2002F — NiCd/NiMH battery charge controller with negative dV, PVT and Top-Off Time setup2 BQ2002G — NiCd/NiMH battery charge controller with negative dV, PVT and tMTO setup2 BQ2002T — NiCd/NiMH battery charge controller with dT/dt termination and low-temperature fault BQ2031 — Switch-mode Lead-Acid Battery Charger with User-Selectable Charge Algorithms BQ2057C — Low Dropout linear 1-cell Li-ion battery charge controller with AutoCompTM, 4.2V BQ24010 — 1-cell, 1-A, linear Li-ion battery charger with AC present and temp sense in QFN-11 package BQ24012 — 1-cell, 1-A, linear Li-ion battery charger w/ FET, AC present & charge enable in QFN-12 BQ24013 — 1-cell, 1-A, linear Li-ion battery charger with charge enable & term enable in QFN-11 package BQ24200 — 500-mA, 4.2-V Li-ion charger for current-Limited App. w/temp sense in MSOP-8 BQ24201 — 500-mA, 4.1-V Li-ion charger for current-Limited App. w/temp sense in MSOP-8 BQ24202 — 500-mA, 4.2-V Li-ion charger for current-Limited App. w/charge status in MSOP-8 BQ24203 — 500-mA, 4.1-V Li-ion charger for current-Limited App. w/charge status in MSOP-8 BQ24205 — 500-mA, 4.1-V Li-ion charger for current-Limited App. in MSOP-8 BQ24715 — SMBus 2-3 cell NVDC Buck battery charge controller with N-Channel MOSFET selectors
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