bq24650 Battery Charge Controller for Solar Power



TI's high efficiency, synchronous switch-mode charge controller - solar battery charger

Texas Instruments bq24650 Battery Charge Controller for Solar PowerTexas Instruments' bq24650EVM evaluation module assists users in evaluating the bq24650 synchronous battery charger. The bq24650 is a highly integrated switch-mode battery charge controller. It provides input voltage regulation, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a solar panel, the input regulation loop lowers the charge current so that the solar panel can provide maximum power output. The bq24650 offers a constant-frequency synchronous PWM controller with high accuracy current and voltage regulation, charge preconditioning, charge termination, and charge status monitoring.The bq24650 charges the battery in three phases: pre-conditioning, constant current and constant voltage. Charge is terminated when the current reaches 1/10 of the fast charge rate.  bq24650 Datasheet

  Features   Applications
  • Maximum Power Point Tracking (MPPT) capability by input voltage regulation
  • Programmable MPPT setting
  • 5V-28V input solar panel
  • 600kHz NMOS-NMOS synchronous buck controller
  • Resistor programmable float voltage
  • Accommodates Li-Ion/polymer, LiFePO4, lead acid chemistries
  • Accuracy
    • ±0.5% charge voltage regulation
    • ±3% charge current regulation
    • ±0.6% input voltage regulation
  • High Integration
    • Internal loop compensation and digital soft start
  • Safety
    • Input over-voltage protection
    • Battery temperature sensing and absent detection
    • Thermal shutdown
  • Charge status outputs for LED or host processor
  • Charge enable on MPPSET pin
  • Solar powered applications
  • Remote monitoring stations
  • Portable handheld instruments
  • 12V to 24V automotive systems
  • Current-limited power source
  • RoHS Compliant

Texas Instruments
Part Number
Digi-Key
Part Number
Packaging Voltage -
Supply
Battery Type Package  
BQ24650RVAT 296-27699-2-ND Tape & Reel 5V ~ 28V Lead Acid, LiFePO4,
Li-Ion, Li-Pol
16-VFQFN
Exposed Pad
bq24650 Datasheet
296-27699-1-ND Cut Tape
296-27699-6-ND Digi-Reel

Evaluation Module
Texas Instruments
Part Number
Digi-Key
Part Number
Description Photo  
BQ24650EVM-639 296-28320-ND The BQ24650EVM evaluation module assists users in evaluating the bq24650 synchronous battery charger. The bq24650 is a highly integrated switch-mode battery charge controller. It provides input voltage regulation, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a solar panel, the input regulation loop maintains the panel at maximum power output. bq24650EVM-639 Photo bq24650User's Guide