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電池充電器 IC

BQ24735

現行

支援渦輪升壓模式的 SMBus 1-4 芯降壓電池充電控制器

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產品規格表

BQ24735

現行
產品規格表 立即訂購

產品詳細資料

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 8 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features Input OVP Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 8 Vin (max) (V) 24 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 1.024 Battery charge voltage (max) (V) 19.2 Absolute max Vin (max) (V) 30 Control topology Switch-Mode Buck Control interface SMBus Features Input OVP Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGR) 20 12.25 mm² 3.5 x 3.5
  • Adapter and Battery Provide Power to System
    Together to Support Intel® CPU Turbo Boost
    Mode
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615-, 750-, and 885-kHz Switching Frequencies
  • Automatic N-Channel MOSFET Selection of
    System Power Source From Adapter or Battery
    Driven by Internal Charge Pumps
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Amplifier Output Accuracy
  • Programmable Battery Depletion Threshold, and
    Battery LEARN Function
  • Programmable Adapter Detection and Indicator
  • Integrated Loop Compensation and Soft Start
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • AC Adapter Operating Range: 4.5 V to 24 V
  • 5-µA Off-State Battery Discharge Current
  • 0.65 mA (0.8 mA Max) Adapter Standby
    Quiescent Current
  • Adapter and Battery Provide Power to System
    Together to Support Intel® CPU Turbo Boost
    Mode
  • SMBus Host-Controlled NMOS-NMOS
    Synchronous Buck Converter With Programmable
    615-, 750-, and 885-kHz Switching Frequencies
  • Automatic N-Channel MOSFET Selection of
    System Power Source From Adapter or Battery
    Driven by Internal Charge Pumps
  • Enhanced Safety Features for Overvoltage
    Protection, Overcurrent Protection, Battery,
    Inductor and MOSFET Short-Circuit Protection
  • Programmable Input Current, Charge Voltage,
    Charge Current Limits
    • ±0.5% Charge Voltage Accuracy up to 19.2 V
    • ±3% Charge Current Accuracy up to 8.128 A
    • ±3% Input Current Accuracy up to 8.064 A
    • ±2% 20× Adapter Current or Charge Current
      Amplifier Output Accuracy
  • Programmable Battery Depletion Threshold, and
    Battery LEARN Function
  • Programmable Adapter Detection and Indicator
  • Integrated Loop Compensation and Soft Start
  • Real-Time System Control on ILIM Pin to Limit
    Charge Current
  • AC Adapter Operating Range: 4.5 V to 24 V
  • 5-µA Off-State Battery Discharge Current
  • 0.65 mA (0.8 mA Max) Adapter Standby
    Quiescent Current

The bq24735 device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multichemistry battery charging applications. The bq24735 device supports turbo boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so the adapter will not crash.

The bq24735 device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage digital-to-analog converters (DACs) allow for very high-regulation accuracies that can be easily programmed by the system power management microcontroller.

The bq24735 device uses an internal input current register or an external ILIM pin to throttle down PWM modulation to reduce the charge current. The bq24735 device charges 1-, 2-, 3-, or 4-series Li+ cells.

The bq24735 device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multichemistry battery charging applications. The bq24735 device supports turbo boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so the adapter will not crash.

The bq24735 device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage digital-to-analog converters (DACs) allow for very high-regulation accuracies that can be easily programmed by the system power management microcontroller.

The bq24735 device uses an internal input current register or an external ILIM pin to throttle down PWM modulation to reduce the charge current. The bq24735 device charges 1-, 2-, 3-, or 4-series Li+ cells.
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類型 標題 日期
* Data sheet bq24735 1- to 4-Cell Li+ Battery SMBus Charge Controller for Supporting Turbo Boost Mode With N-Channel Power MOSFET Selector datasheet (Rev. B) PDF | HTML 2015年 4月 29日
Application note Autonomous Smart Battery Guide PDF | HTML 2021年 10月 15日
Analog Design Journal 1Q 2012 Issue Analog Applications Journal 2012年 1月 31日
Analog Design Journal Turbo boost charger supports CPU turbo mode 2012年 1月 31日
User guide bq24735/725A Battery Charger Evaluation Module (Rev. A) 2011年 8月 16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)。

開發板

BQ24735EVM-710 — 適用於 BQ24735、1-4 芯鋰離子電池 SMBus 充電控制器的評估模組

The BQ24735EVM-710 evaluation module (EVM) is a complete charger module for evaluating a multicell synchronous notebook turbo boost charge using the bq24735 devices. It is designed to deliver up to 4 A of charge current to Li-ion or Li-polymer applications. The charge current is programmable by (...)

使用指南: PDF
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驅動程式或資料庫

BQ24735SW-LINUX — 適用於 BQ24735 的 Linux 驅動程式

The Linux driver supports the BQ24735 1-4 cell Li+ battery charge controller. The Linux driver supports communication through the I2C bus and interfaces with the power supply sub-system.

 

Linux mainline status

Available in Linux Main line: Yes
Available through git.ti.com: N/A 

Linux source files

The (...)

檢視選項
開發模組 (EVM) 的 GUI

SLUC258 — bq24725A/735/728/738 SMBus Gui

支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
BQ24725A — 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 BQ24735 — 支援渦輪升壓模式的 SMBus 1-4 芯降壓電池充電控制器
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計算工具

SLUC203 — bq24725_725A_726_707_73x Calculation Tool

支援產品和硬體

支援產品和硬體

產品
電池充電器 IC
BQ24707 — 具獨立式比較器和電路保護的 SMBus 1 到 4 芯降壓電池充電控制器 BQ24707A — 具獨立比較器和進階電路保護的 1 到 4 芯鋰離子電池充電控制器。 BQ24725 — 具 N 通道功率 MOSFET 選擇器的 SMBus 2-4 芯降壓電池充電器控制器 BQ24725A — 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 BQ24735 — 支援渦輪升壓模式的 SMBus 1-4 芯降壓電池充電控制器
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參考設計

TIDA-00039 — 1-4 芯鋰離子電池 SMBus 充電控制器參考設計

This reference design is a complete charger module for evaluating a multi-cell synchronous notebook turbo boost charge using the bq24735 devices. It is designed to deliver up to 4 A of charge current to Li-ion or Li-polymer applications. The charge current is programmable by SMBus interface through (...)
Test report: PDF
電路圖: PDF
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VQFN (RGR) 20 檢視選項
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