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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | BQ24650 Stand-Alone Synchronous Buck Battery Charge Controller for Solar Power With Maximum Power Point Tracking datasheet (Rev. B) | PDF | HTML | 2019/10/2 | ||
| 應用說明 | How to Charge a Lead-Acid Battery With a Li-Ion Charger | 2020/4/29 | ||||
| 應用說明 | BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers | 2019/12/31 | ||||
| 應用說明 | Preventing bq24650 Leakage Current When Using Shaded Solar Panels | 2016/9/19 | ||||
| 類比設計期刊 | 2Q 2012 Issue Analog Applications Journal | 2012/4/26 | ||||
| 類比設計期刊 | Solar charging solution provides narrow-voltage DC/DC system bus for multicell | 2011/11/9 | ||||
| 類比設計期刊 | 4Q 2011 Issue Analog Applications Journal | 2011/11/9 | ||||
| 應用說明 | Using the bq24650 to Charge a Sealed, Lead-Acid Battery (Rev. A) | 2011/10/4 | ||||
| 應用說明 | How to Review a Multicell Switching Charger Schematic | 2011/9/21 | ||||
| 類比設計期刊 | 3Q 2011 Issue Analog Applications Journal | 2011/9/16 | ||||
| 應用說明 | Maximum Power Point Tracking With the bq24650 Charger. (Rev. A) | 2011/8/15 | ||||
| 應用說明 | Using the bq24650 to Charge a LiFePO4 battery | 2010/8/24 |
設計與開發
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BQ24650EVM-639 — 適用於太陽能的 BQ24650 評估模組同步切換模式電池充電控制器
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 (...)
TIDA-00049 — 高效率同步切換模式充電器控制器太陽能鋰電池充電器參考設計
此參考設計運用在太陽能鋰電池應用中。此設計包含整合式切換模式電池充電控制器，提供輸入電壓調節，可在輸入電壓降至編程位準以下時減少充電電流。當輸入由太陽電池板供電時，輸入穩壓迴路可將面板維持在最大功率輸出。此解決方案又稱為 HPA639 A。本手冊包含物料清單、電路板佈局和電路圖。本使用者指南介紹了該解決方案的功能和運作方式。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RVA) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。