BQ24725

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具有 N 沟道功率 MOSFET 选择器的 SMBus 2 至 4 节降压电池充电控制器

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数据表

document-pdfAcrobat 2-4Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector 数据表 (Rev. A) (英语)

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BQ24725A

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具有 N 沟道功率 MOSFET 选择器的 SMBus 1 至 4 节降压电池充电控制器 BQ24725A is P2P option that supports 1 cell batteries.

BQ24725

正在供货

数据表

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产品详情

Rating

Catalog

Number of series cells

2, 3, 4

Cell chemistry

Li-Ion/Li-Polymer

Charge current (max) (A)

Features

Input OVP, Power Path

Vin (min) (V)

Vin (max) (V)

Absolute max Vin (max) (V)

Control topology

Switch-Mode Buck

Battery charge voltage (min) (V)

1.024

Battery charge voltage (max) (V)

19.2

Control interface

SMBus

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Number of series cells

2, 3, 4

Cell chemistry

Li-Ion/Li-Polymer

Charge current (max) (A)

Features

Input OVP, Power Path

Vin (min) (V)

Vin (max) (V)

Absolute max Vin (max) (V)

Control topology

Switch-Mode Buck

Battery charge voltage (min) (V)

1.024

Battery charge voltage (max) (V)

19.2

Control interface

SMBus

Operating temperature range (°C)

-40 to 85

VQFN (RGR)

12.25 mm² (3.5 mm × 3.5 mm)

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 LERAN 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 9V-24V
5µA Off-State Battery Discharge Current
20-pin 3.5 × 3.5 mm² QFN Package
APPLICATIONS
- Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
- Personal Digital Assistant
- Handheld Terminal
- Industrial and Medical Equipment
- Portable Equipment

PowerPAD is a trademark of Texas Instruments.

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 LERAN 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 9V-24V
5µA Off-State Battery Discharge Current
20-pin 3.5 × 3.5 mm² QFN Package
APPLICATIONS
- Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
- Personal Digital Assistant
- Handheld Terminal
- Industrial and Medical Equipment
- Portable Equipment

PowerPAD is a trademark of Texas Instruments.

The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The bq24725 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 DACs allow for high regulation accuracies that can be programmed by the system power management micro-controller.

The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm² QFN package.

The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The bq24725 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 DACs allow for high regulation accuracies that can be programmed by the system power management micro-controller.

The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.

The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm² QFN package.

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顶层文档	类型	标题	格式选项	下载最新的英语版本		日期
*	数据表	2-4Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector 数据表 (Rev. A)				2010-11-9
	应用手册	How to Review a Multicell Switching Charger Schematic				2011-9-21