Calculation tool
BQ24650
Standalone 1-6 cell Buck battery charge controller with solar input and integrated MPPT
Data sheet
BQ24650
- Maximum Power Point Tracking (MPPT) capability by input Voltage regulation
- Programmable MPPT setting
- 5-V to 28-V Input solar panel
- 600-kHz 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
- Internal digital soft start
- Safety
- Input overvoltage protection
- Battery temperature-sensing
- Battery absent detection
- Thermal shutdown
- Charge status outputs for LED or host processor
- Charge enable on MPPSET pin
- Automatic sleep mode for low power consumption
- < 15-µA OFF-state battery discharge current
- Small 3.5 × 3.5 mm2 16-pin QFN package
The BQ24650 device 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. The pre-charge timer is fixed at 30 minutes. The BQ24650 automatically restarts the charge cycle if the battery voltage falls below an internal threshold and enters a low quiescent current sleep mode when the input voltage falls below the battery voltage.
The BQ24650 supports a battery from 2.1 V to 26 V with VFB set to a 2.1-V feedback reference. The charge current is programmed by selecting an appropriate sense resistor. The BQ24650 is available in a 16 -pin, 3.5 mm × 3.5 mm2 thin QFN package.
Technical documentation
No results found. Please clear your search and try again.
View all 13 Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
BQ24650EVM-639 — BQ24650 Evaluation Module Synchronous, Switch-Mode, Battery Charge Controller for Solar Power
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 (...)
User guide: PDF
Reference designs
TIDA-00049 — High efficiency sync switch mode charger controller solar lithium battery charger reference design
This reference design is featured in solar lithium battery applications. This design, which contains an integrated switch-mode battery charge controller, provides input voltage regulation, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RVA) | 16 | Ultra Librarian |
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
Information included:
- Fab location
- Assembly location
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.