BQ24650 - 高效同步开关模式充电器控制器 - 太阳能电池充电器

BQ24650是TI德州仪器公司的一款电池充电器IC产品，BQ24650是高效同步开关模式充电器控制器 - 太阳能电池充电器，本站介绍了BQ24650的封装应用图解、特点和优点、功能等，并给出了与BQ24650相关的TI元器件型号供参考。

BQ24650 - 高效同步开关模式充电器控制器 - 太阳能电池充电器 - 电池充电器IC - 电池管理产品 - 德州仪器

产品描述

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. 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 2.1V to 26V with VFB set to a 2.1V feedback reference. The charge current is programmed by selecting an appropriate sense resistor. The bq24650 is available in a 16 pin, 3.5×3.5 mm2 thin QFN package.

产品特性

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
- Internal Digital Soft Start
Safety
- Input Over-Voltage 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
- <15μA Off-State Battery Discharge Current
Small 3.5 × 3.5 mm2 QFN-16 Package
APPLICATIONS
- Solar Powered Applications
- Remote Monitoring Stations
- Portable Handheld Instruments
- 12V to 24V Automotive Systems
- Current-Limited Power Source

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