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Product InformationFeatures
- Two-Step Voltage with temperature-compensated constant-voltage maintenance - Two-Step Current with constant-rate pulsed current maintenance - Pulsed Current: hysteretic, on-demand pulsed current - Ideal for high-efficiency switch-mode power conversion - Configurable for linear or gated current use Description
The bq2031 Lead-Acid Fast Charge IC is designed to optimize charging of lead-acid chemistry batteries. A flexible pulse-width modulation regulator allows the bq2031 to control constant-voltage, constant-current, or pulsed-current charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum for high charge current applications. A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2031 provides trickle-currentcharging until the voltage rises into the allowed range or an internal timer runs out and places the bq2031 in a Fault condition. This procedure prevents high-current charging of cells that are possibly damaged or reversed. Charging is inhibited anytime the temperature of the battery is outside the configurable, allowed range. All voltage thresholds are temperature-compensated. The bq2031 terminates fast (bulk) charging based on the following: 2V) |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| BQ2031PN-A5 | ACTIVE | -20 to 70 | 3.50 | 100u | PDIP (N) | 16 | View | 25 | TUBE | |||
| BQ2031PN-A5E4 | ACTIVE | -20 to 70 | 3.50 | 100u | PDIP (N) | 16 | View | 25 | TUBE | |||
| BQ2031SN-A5 | ACTIVE | -20 to 70 | 3.50 | 100u | SOIC (D) | 16 | View | 40 | TUBE | |||
| BQ2031SN-A5G4 | ACTIVE | -20 to 70 | 3.50 | 100u | SOIC (D) | 16 | View | 40 | TUBE | |||
| BQ2031SN-A5TR | ACTIVE | -20 to 70 | 3.50 | 100u | SOIC (D) | 16 | View | 2500 | LARGE T&R | Purchase Samples | ||
| BQ2031SN-A5TRG4 | ACTIVE | -20 to 70 | 3.50 | 100u | SOIC (D) | 16 | View | 2500 | LARGE T&R | Purchase Samples | ||
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| TI Inventory Status | Reported Distributor Inventory | |||||||
| BQ2031PN-A5 | As of 10:16 AM GMT, 19 Nov 2008 | As of 10:16 AM GMT, 19 Nov 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 17 Dec | 4 Weeks | Americas | DigiKey | 100 | |||
| Mouser Electronics | 321 | |||||||
| Rochester Electronics | 6 | |||||||
| Asia | WPI | 61 | ||||||
| Europe | Spoerle | 50 | ||||||
| BQ2031PN-A5E4 | As of 10:16 AM GMT, 19 Nov 2008 | As of 10:16 AM GMT, 19 Nov 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | >10k | 17 Dec | 4 Weeks | None Reported View Distributors | |||||
| BQ2031SN-A5 | As of 10:16 AM GMT, 19 Nov 2008 | As of 10:16 AM GMT, 19 Nov 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 1020 | 16 Dec | 12 Weeks | Americas | Avnet | 250 | |||
| >10k | 19 Jan | DigiKey | >1k | ||||||
| Mouser Electronics | 329 | |||||||
| Newark | >1k | |||||||
| Europe | Avnet-SILICA | 30 | ||||||
| Farnell | 322 | |||||||
| BQ2031SN-A5G4 | As of 10:16 AM GMT, 19 Nov 2008 | As of 10:16 AM GMT, 19 Nov 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 1020 | 16 Dec | 12 Weeks | Europe | EBV Elektronik | 20 | |||
| >10k | 19 Jan | ||||||||
| BQ2031SN-A5TR | As of 10:16 AM GMT, 19 Nov 2008 | As of 10:16 AM GMT, 19 Nov 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 151 | 22 Dec | 12 Weeks | Americas | Arrow | >1k | |||
| 153 | 7 Jan | ||||||||
| 152 | 14 Jan | ||||||||
| 152 | 21 Jan | ||||||||
| >10k | 23 Jan | ||||||||
| BQ2031SN-A5TRG4 | As of 10:16 AM GMT, 19 Nov 2008 | As of 10:16 AM GMT, 19 Nov 2008 | ||||||
| In Stock | In Progress QTY | Date | Lead Time | Region | Company | In Stock | Purchase | ||
| 0* | 151 | 22 Dec | 12 Weeks | Europe | EBV Elektronik | >1k | |||
| 153 | 7 Jan | ||||||||
| 152 | 14 Jan | ||||||||
| 152 | 21 Jan | ||||||||
| >10k | 23 Jan | ||||||||
* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
| BQ2031PN-A5 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | View | View |
| BQ2031PN-A5E4 | Pb-Free (RoHS) | CU NIPDAU | N/A for Pkg Type | View | View |
| BQ2031SN-A5 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| BQ2031SN-A5G4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| BQ2031SN-A5TR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| BQ2031SN-A5TRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.
View Application Notes for Battery Charge Management
| Name | Part # | Company | Tool / Software Type |
| Temp Sense Designer Software | TEMPSENSE-SW | Texas Instruments | Analysis Software |
| Evaluation Module for Lead Acid, switchmode BQ2031 | DV2031S2 | Texas Instruments | Development Boards/EVMs |
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| BQ24702 | Multi-Chemistry Battery Charge Controller and System Power Selector | TI customers also evaluated this product. | |
| UC2909 | Switch-mode Lead-Acid Battery Charger with Differential Current Sense | TI customers also evaluated this product. | |
| UC2906 | Linear Lead-Acid Battery Charger | TI customers also evaluated this product. | |

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