BQ24450DW ,Integrated Charge Controller for Lead-Acid Batteries 16-SOIC ELECTRICAL CHARACTERISTICSOver junction temperature range–40°C≤ T≤ 70°C, V = 10V, T = T . (Positive ..
BQ24600RVAR ,Standalone Synchronous Switch-mode Charge Controller 16-VQFN -40 to 85 SLUS891B–FEBRUARY 2010–REVISED NOVEMBER 20145 Pin Configuration and FunctionsRVA Package(Top View) ..
BQ24610RGER ,Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with 5V?28V VCC Input 24-VQFN -40 to 85Features – Charger Operation Status• Charge Enable Pin1• 600-kHz NMOS-NMOS Synchronous BuckConverte ..
BQ24610RGET ,Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with 5V?28V VCC Input 24-VQFN -40 to 85 SLUS892C–DECEMBER 2009–REVISED APRIL 20155 Description (continued)Charge is terminated when the cu ..
BQ24617RGER ,Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with 5V?24V VCC Input 24-VQFN -40 to 85 SLUS892C–DECEMBER 2009–REVISED APRIL 20155 Description (continued)Charge is terminated when the cu ..
BQ24617RGET ,Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with 5V?24V VCC Input 24-VQFN -40 to 85Features – Charger Operation Status• Charge Enable Pin1• 600-kHz NMOS-NMOS Synchronous BuckConverte ..
BUL1102EFP ,HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORBUL1102EFP®HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR■ HIGH VOLTAGE CAPABILITY■ LOW SPREAD OF ..
BUL116D ,MEDIUM VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORAPPLICATIONS: ■ COMPACT FLUORESCENT LAMPS UP TO 3 ..
BUL1203E ,HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORBUL1203E®HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR■ HIGH VOLTAGE CAPABILITY ■ LOW SPREAD OF ..
BUL1203EFP ,HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORBUL1203EFP®HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR■ HIGH VOLTAGE CAPABILITY ■ LOW SPREAD O ..
BUL128 ,HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORBUL128®HIGH VOLTAGE FAST-SWITCHINGNPN POWER TRANSISTOR■ STMicroelectronics PREFERREDSALESTYPE■ NPN ..
BUL128. ,HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTORAPPLICATIONS: 1■ ELECTRONIC BALLASTS FORFLUORESCE ..
BQ24450DW
Integrated Charge Controller for Lead-Acid Batteries
416QEXT
RISNS
VRLA
Battery
CCOMP IFB DRVC DRVE
PRE-CHG
VFB
STAT1
PGOODGND COMP
STAT2
ISNS
BSTOP
bq24450
bq24450
www.ti.com SLUS929C –APRIL 2009–REVISED FEBRUARY 2012
INTEGRATED CHARGE CONTROLLER FOR LEAD-ACID BATTERIES
Checkfor Samples: bq24450
1FEATURES •
Supports Different Configurations Minimum External Components•
Regulates Both Voltage and Current During
Charging •
Availablein 16-Pin SOIC (DW) Precision Temperature-Compensated APPLICATIONSReference: Maximizes Battery Capacity Over •
Emergency Lighting Systems
Temperature •
Security and Alarm Systems Ensures Safety While Charging Over •
Telecommunication Backup PowerTemperature •
Uninterruptible Power Supplies Optimum Controlto Maximize Battery Capacity
and Life
DESCRIPTIONThe bq24450 containsall the necessary circuitryto optimally control the chargingof valve-regulated lead-acid
batteries. TheIC controls the charging currentas wellas the charging voltageto safely and efficiently charge the
battery, maximizing battery capacity and life. Depending on the application, theIC canbe configuredasa simple
constant-voltage float charge controllerora dual-voltage float-cum-boost charge controller.
The built-in precision voltage referenceis especially temperature-compensatedto track the characteristicsof
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 monitoringby minimizing
self-heating effects.
TheIC can supporta wide rangeof battery capacities and charging currents, limited onlyby the selectionof the
external pass transistor. The versatile driver for the external pass transistor supports both NPN and PNP types
and providesat least 25mAof base drive. additionto 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. Someof these comparator outputs are made availableas status signalsat external pinsof the IC. These
status and control pins can be connectedtoa processor,or they can be connected upin flexible ways for
standalone applications.
1. TYPICAL APPLICATION SCHEMATIC with Pre-Charge
