The bq24450 contains all the necessary circuitry to optimally control the charging of valve-regulated lead-acid batteries. The IC controls the charging current as well as the charging voltage to safely and efficiently charge the battery, maximizing battery capacity and life. Depending on the application, the IC can be configured as a simple constant-voltage float charge controller or a dual-voltage float-cum-boost charge controller.

The built-in precision voltage reference is especially temperature-compensated to track the characteristics of lead-acid cells, and maintains optimum charging voltage over an extended temperature range without using any external components. The ICs low current consumption allows for accurate temperature monitoring by minimizing self-heating effects.

The IC can support a wide range of battery capacities and charging currents, limited only by the selection of the external pass transistor. The versatile driver for the external pass transistor supports both NPN and PNP types and provides at least 25mA of base drive.

In addition to the voltage- and current-regulating amplifiers, the IC features comparators that monitor the charging voltage and current. These comparators feed into an internal state machine that sequences the charge cycle. Some of these comparator outputs are made available as status signals at external pins of the IC. These status and control pins can be connected to a processor, or they can be connected up in flexible ways for standalone applications.

• Regulates Both Voltage and Current During Charging
• Precision Temperature-Compensated Reference:
  • Maximizes Battery Capacity Over Temperature
  • Ensures Safety While Charging Over Temperature
• Optimum Control to Maximize Battery Capacity and Life
• Supports Different Configurations
• Minimum External Components
• Available in 16-Pin SOIC (DW)
• APPLICATIONS
  • Emergency Lighting Systems
  • Security and Alarm Systems
  • Telecommunication Backup Power
  • Uninterruptible Power Supplies

• Number of series cells
• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
• Charge current (Max) (A)
• 10
• 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
• Operating Vin (Min) (V)
• 5
• Rating
• Catalog

BQ24450的完整型号有：BQ24450DW、BQ24450DWTR，以下是这些产品的关键参数及官网采购报价：

BQ24450DW，工作温度：-40 to 70，封装：SOIC (DW)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24450DW的批量USD价格：6.143（1000+）

BQ24450DWTR，工作温度：-40 to 70，封装：SOIC (DW)-16，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24450DWTR的批量USD价格：5.233（1000+）

BQ24450EVM-691 — 用于铅酸电池的 BQ24450 集成充电控制器的评估模块

bq24450EVM-691 可以帮助用户评估 bq24450 线性电池充电器。用户指南手册中包含 bq24450EVM-691 物料清单、板面布局和原理图。bq24450 包含最佳控制铅酸电池充电所需的全部电路。该 IC 控制充电电流以及充电电压，安全、高效地对电池充电，最大限度地延长电池的容量和寿命。根据不同的应用，该 IC 可配置为简单的恒压浮充电控制器或双电压浮动暨升压充电控制器。