首頁 電池管理 IC 電池充電器 IC
首頁
電池管理 IC
電池充電器 IC

BQ24745

不推薦在新設計中採用

SMBus 高達 4 芯 2 級降壓電池充電器，以支援多重電池化學物質

立即訂購
產品規格表
BQ24745 不建議用於新設計
儘管為了支援以前的設計而繼續生產此項產品，但我們並不建議用在新設計上。考量下列其中一項替代產品：
open-in-new 比較替代產品
功能相似於所比較的產品
BQ24725A 現行 具 N 通道功率 MOSFET 選擇器的 SMBus 1-4 芯降壓電池充電器控制器 This product is 1-4S Li+ Battery SBMus charger controller

BQ24745

不推薦在新設計中採用
產品規格表 立即訂購

產品詳細資料

Number of series cells 2, 3, 4 Charge current (max) (A) 10 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 24 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features Power Path Vin (min) (V) 7 Rating Catalog Operating temperature range (°C) 0 to 0
Number of series cells 2, 3, 4 Charge current (max) (A) 10 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 24 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features Power Path Vin (min) (V) 7 Rating Catalog Operating temperature range (°C) 0 to 0
VQFN (RHD) 28 25 mm² 5 x 5
  • NMOS-NMOS Synchronous Buck Converter with
    300-kHz Frequency and >95% Efficiency
  • 30-ns Minimum Driver Dead-Time and
    99.5% Maximum Effective Duty Cycle
  • High-Accuracy Voltage and Current Regulation
    • ±0.5% Charge Voltage Accuracy
    • ±3% Charge Current Accuracy
    • ±3% Adapter Current Accuracy
    • ±2% Input Current Sense Amp Accuracy
  • Integration
    • Input Current Comparator, With Adjustable
      Threshold and Hysteresis
    • Internal Soft-Start
  • Safety
    • Dynamic Power Management (DPM)
  • Up to 19.2-V Battery Voltage
  • 7-V–24-V AC/DC-Adapter Operating Range
  • Simplified SMBus Control Interface
    • Charge Voltage DAC (1.024 V–19.2 V)
    • Charge Current DAC (128 mA–8.064 A)
    • Adapter Current Limit DPM DAC
      (256 mA–11.008 A)
  • Status and Monitoring Outputs
    • AC/DC Adapter Present With
      Adjustable Voltage Threshold
    • Input Current Comparator With Adjustable
      Threshold and Hysteresis
    • Current Sense Amplifier for Current Drawn
      From Input Source
  • Charge Any Battery Chemistry: Li+, NiCd,
    NiMH, Lead Acid, Etc.
  • Charge Enable Pin
  • < 10-µA Battery Current With Adapter Removed
  • < 1-mA Input DCIN Current With Adapter
    Present and Charge Disabled
  • 28-Pin, 5-mm × 5-mm QFN Package
  • NMOS-NMOS Synchronous Buck Converter with
    300-kHz Frequency and >95% Efficiency
  • 30-ns Minimum Driver Dead-Time and
    99.5% Maximum Effective Duty Cycle
  • High-Accuracy Voltage and Current Regulation
    • ±0.5% Charge Voltage Accuracy
    • ±3% Charge Current Accuracy
    • ±3% Adapter Current Accuracy
    • ±2% Input Current Sense Amp Accuracy
  • Integration
    • Input Current Comparator, With Adjustable
      Threshold and Hysteresis
    • Internal Soft-Start
  • Safety
    • Dynamic Power Management (DPM)
  • Up to 19.2-V Battery Voltage
  • 7-V–24-V AC/DC-Adapter Operating Range
  • Simplified SMBus Control Interface
    • Charge Voltage DAC (1.024 V–19.2 V)
    • Charge Current DAC (128 mA–8.064 A)
    • Adapter Current Limit DPM DAC
      (256 mA–11.008 A)
  • Status and Monitoring Outputs
    • AC/DC Adapter Present With
      Adjustable Voltage Threshold
    • Input Current Comparator With Adjustable
      Threshold and Hysteresis
    • Current Sense Amplifier for Current Drawn
      From Input Source
  • Charge Any Battery Chemistry: Li+, NiCd,
    NiMH, Lead Acid, Etc.
  • Charge Enable Pin
  • < 10-µA Battery Current With Adapter Removed
  • < 1-mA Input DCIN Current With Adapter
    Present and Charge Disabled
  • 28-Pin, 5-mm × 5-mm QFN Package

The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges two, three, or four series Li+ cells, and is available in a 28-pin, 5-mm × 5 mm QFN package.

The bq24745 features dynamic power management (DPM) and input power limiting. These features reduce battery-charge current when the input power limit is reached to avoid overloading the ac adaptor when supplying the load and the battery charger simultaneously. A highly accurate current-sense amplifier enables precise measurement of input current from the ac adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its performance to the power available from the adapter. An integrated comparator monitors the input current through the current-sense amplifier, and indicates when the input current exceeds a programmable threshold limit.

The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges two, three, or four series Li+ cells, and is available in a 28-pin, 5-mm × 5 mm QFN package.

The bq24745 features dynamic power management (DPM) and input power limiting. These features reduce battery-charge current when the input power limit is reached to avoid overloading the ac adaptor when supplying the load and the battery charger simultaneously. A highly accurate current-sense amplifier enables precise measurement of input current from the ac adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its performance to the power available from the adapter. An integrated comparator monitors the input current through the current-sense amplifier, and indicates when the input current exceeds a programmable threshold limit.
open-in-new 尋找其它 電池充電器 IC
下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 4
類型 標題 日期
* Data sheet SMBus-Controlled Multi-chemistry Battery Charger With Input Current datasheet (Rev. D) 2011年 10月 5日
Application note How to Review a Multicell Switching Charger Schematic 2011年 9月 21日
More literature Журнал по применению аналоговых компонентов 1 кв. 2010 2010年 9月 23日
Analog Design Journal Li-ion battery-charger solutions for JEITA compliance 2010年 1月 29日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

驅動程式或資料庫

SLUC098 — bq24745 Driver (USB EV2300) Installer

支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
BQ24745 — SMBus 高達 4 芯 2 級降壓電池充電器，以支援多重電池化學物質
下載
支援軟體

SLUC097 — bq24745EVSWv101

支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
BQ24745 — SMBus 高達 4 芯 2 級降壓電池充電器，以支援多重電池化學物質
下載
參考設計

PMP9668 — 通用 uP 控制電池充電器 24Vin、最大 10 Aout、5/12V 2A 和 5V 4A、2 個 USB 連接埠參考設計

BQ24745 is a host controlled synchronous buck battery charger capable of charging batteries at up to 19.2V and up to 8 A normally, extended to 10 A with use of 8 mOhm battery sense resistor. The power train is capable of 8 A with convection only cooling and 10 A with moderate fan cooling (~200 (...)
Test report: PDF
電路圖: PDF
封裝 引腳 下載
VQFN (RHD) 28 檢視選項
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 資格摘要
  • 進行中可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片