Product details

Number of series cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 Charge current (Max) (A) 2 Operating Vin (Max) (V) 40 Cell chemistry Lead Acid Battery charge voltage (Min) (V) 0 Battery charge voltage (Max) (V) 20 Absolute Vin (safety rating) (Max) ((V)) 40 Control interface Standalone (RC-Settable) Features IC thermal regulation Rating Catalog
Number of series cells 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 Charge current (Max) (A) 2 Operating Vin (Max) (V) 40 Cell chemistry Lead Acid Battery charge voltage (Min) (V) 0 Battery charge voltage (Max) (V) 20 Absolute Vin (safety rating) (Max) ((V)) 40 Control interface Standalone (RC-Settable) Features IC thermal regulation Rating Catalog
PDIP (N) 16 181 mm² 19.3 x 9.4 SOIC (DW) 16 77 mm² 10.3 x 7.5
  • Optimum Control for Maximum Battery Capacity and Life
  • Internal State Logic Provides Three Charge States
  • Precision Reference Tracks Battery Requirements Over Temperature
  • Controls Both Voltage and Current at Charger Output
  • System Interface Functions
  • Typical Standby Supply Current of only 1.6mA

  • Optimum Control for Maximum Battery Capacity and Life
  • Internal State Logic Provides Three Charge States
  • Precision Reference Tracks Battery Requirements Over Temperature
  • Controls Both Voltage and Current at Charger Output
  • System Interface Functions
  • Typical Standby Supply Current of only 1.6mA

The UC2906 series of battery charger controllers contains all of the necessary circuitry to optimally control the charge and hold cycle for sealed lead-acid batteries. These integrated circuits monitor and control both the output voltage and current of the charger through three separate charge states; a high current bulk-charge state, a controlled over-charge, and a precision float-charge, or standby, state.

Optimum charging conditions are maintained over an extended temperature range with an internal reference that tracks the nominal temperature characteristics of the lead-acid cell. A typical standby supply current requirement of only 1.6mA allows these ICs to predictably monitor ambient temperatures.

Separate voltage loop and current limit amplifiers regulate the output voltage and current levels in the charger by controlling the onboard driver. The driver will supply up to 25mA of base drive to an external pass device. Voltage and current sense comparators are used to sense the battery condition and respond with logic inputs to the charge state logic. A charge enable comparator with a trickle bias output can be used to implement a low current turn-on mode of the charger, preventing high current charging during abnormal conditions such as a shorted battery cell.

Other features include a supply under-voltage sense circuit with a logic output to indicate when input power is present. In addition the over-charge state of the charger can be externally monitored and terminated using the over-charge indicate output and over-charge terminate input.

The UC2906 series of battery charger controllers contains all of the necessary circuitry to optimally control the charge and hold cycle for sealed lead-acid batteries. These integrated circuits monitor and control both the output voltage and current of the charger through three separate charge states; a high current bulk-charge state, a controlled over-charge, and a precision float-charge, or standby, state.

Optimum charging conditions are maintained over an extended temperature range with an internal reference that tracks the nominal temperature characteristics of the lead-acid cell. A typical standby supply current requirement of only 1.6mA allows these ICs to predictably monitor ambient temperatures.

Separate voltage loop and current limit amplifiers regulate the output voltage and current levels in the charger by controlling the onboard driver. The driver will supply up to 25mA of base drive to an external pass device. Voltage and current sense comparators are used to sense the battery condition and respond with logic inputs to the charge state logic. A charge enable comparator with a trickle bias output can be used to implement a low current turn-on mode of the charger, preventing high current charging during abnormal conditions such as a shorted battery cell.

Other features include a supply under-voltage sense circuit with a logic output to indicate when input power is present. In addition the over-charge state of the charger can be externally monitored and terminated using the over-charge indicate output and over-charge terminate input.

Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet Sealed Lead-Acid Battery Charger datasheet (Rev. C) 23 May 2005
Technical article When to use rechargeable batteries in small battery applications 01 Oct 2019
Technical article Should I use a linear charger or a switching charger? 31 Oct 2015
Technical article Summertime and the livin' is easy 20 Jun 2014
Application note U-104 Improved Charging Methods for Lead-Acid Batteries Using the UC3906 05 Sep 1999
Application note U-131 Simple Switchmode Lead-Acid Battery Charger 05 Sep 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Package Pins Download
PDIP (N) 16 View options
SOIC (DW) 16 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos