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電池充電器 IC

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

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產品規格表

BQ24725A

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, Power Path 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, Power Path 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
  • SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching frequencies
  • Automatic N-channel MOSFET selection of system power source from adapter or battery driven by internal charge pumps
  • Enhanced safety features for over voltage protection, over current protection, battery, inductor and MOSFET short circuit protection
  • Programmable input current, charge voltage, charge current limits
    • ±0.5% Charge voltage accuracy up to 19.2V
    • ±3% Charge current accuracy up to 8.128A
    • ±3% Input current accuracy up to 8.064A
    • ±2% 20x Adapter current or charge current amplifier output accuracy
  • Programmable battery depletion threshold, and battery LEARN function
  • Programmable adapter detection and indicator
  • Integrated soft start
  • Integrated loop compensation
  • Real time system control on ILIM pin to limit charge current
  • AC Adapter operating range 4.5V-24V
  • 5µA Off-state battery discharge current
  • 0.65mA (0.8mA max) Adapter standby quiescent current
  • 20-pin 3.5 x 3.5 mm2 VQFN Package
  • SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching frequencies
  • Automatic N-channel MOSFET selection of system power source from adapter or battery driven by internal charge pumps
  • Enhanced safety features for over voltage protection, over current protection, battery, inductor and MOSFET short circuit protection
  • Programmable input current, charge voltage, charge current limits
    • ±0.5% Charge voltage accuracy up to 19.2V
    • ±3% Charge current accuracy up to 8.128A
    • ±3% Input current accuracy up to 8.064A
    • ±2% 20x Adapter current or charge current amplifier output accuracy
  • Programmable battery depletion threshold, and battery LEARN function
  • Programmable adapter detection and indicator
  • Integrated soft start
  • Integrated loop compensation
  • Real time system control on ILIM pin to limit charge current
  • AC Adapter operating range 4.5V-24V
  • 5µA Off-state battery discharge current
  • 0.65mA (0.8mA max) Adapter standby quiescent current
  • 20-pin 3.5 x 3.5 mm2 VQFN Package

The BQ24725A is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The BQ24725A utilizes 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 DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The BQ24725A uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The BQ24725A charges one, two, three or four series Li+ cells.

The BQ24725A is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The BQ24725A utilizes 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 DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

The BQ24725A uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The BQ24725A charges one, two, three or four series Li+ cells.

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類型 標題 日期
* Data sheet BQ24725A SMBus 1- to 4-Cell Li+ Buck Battery Charge Controller with N-Channel Power MOSFET Selector datasheet (Rev. C) PDF | HTML 2019年 10月 2日
Application note Autonomous Smart Battery Guide PDF | HTML 2021年 10月 15日
Technical article Using battery charger ICs to shrink your design for vacuum robots PDF | HTML 2018年 3月 21日
Application note How to Review a Multicell Switching Charger Schematic 2011年 9月 21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

BQ24725AEVM-710 — BQ24725A 1 到 4 芯鋰離子電池 SMBus 充電控制器評估模組

The BQ24725AEVM-710 evaluation module (EVM) is a complete charger module for evaluating a multicell synchronous notebook turbo boost charge using the bq24725A device. 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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應用軟體及架構

TI-CHARGER-GUI — 適於與 USB2ANY 和電池充電搭配使用的 GUI 軟體評估模組

TI-CHARGER-GUI 提供網路型或獨立式圖形使用者介面，協助評估、設計、配置或測試電池充電器產品。該軟體提供暫存器的完整存取權，以及用於傳送及排序指令的簡易介面。
在雲端評估
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

PMP21618 — 適用於 12-V 鉛酸電池充電器的通用輸入參考設計

This reference design takes a Universal AC input (85 VAC - 265 VAC) and converts to a 17.5-V isolated output using a PSR flyback topology. It is then followed by a battery charger circuit, which outputs up to 15 V to a lead acid battery. This is a fast-charge design capable of delivering 12 V @ (...)
Test report: PDF
電路圖: PDF
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VQFN (RGR) 20 檢視選項
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