BQ24298USB充电器datasheet电路参考图

USB

需积分: 9 191 浏览量更新于2023-05-31 评论收藏 1.08MB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

资源详情

资源评论

资源推荐

VBUS

PMID

SDA

SCL

INT

OTG

PSEL

BOOT

REGN

PGND

SYS

BAT

ILIM

SYS: 3.5V-4.35V

5V USB

SDP/DCP

bq24298

Thermal Pad

REGN

1 Fμ

8.2

μF

47nF

4.7 Fμ

1 Hμ

10μF

317W

(1.5A max)

VREF

10kW

STAT

SYS

2.2kW

PHY

Host

10 Fμ

QON

4.2V

5.25kW

31.23kW

10kW

Charge Enable (0°C - 45°C)

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

bq24298

ZHCSDK7 –APRIL 2015

bq24298 具具有有窄窄范范围围 VDC 电电源源路路径径管管理理和和可可调调电电压压 USB OTG 的的 I

C 控控制制

3A 单单节节 USB 充充电电器器

1 特特性性

• 90% 高效开关模式 3A 充电器 – 热调节和热关断

• 3.9V 至 6.2V 单输入 USB 标准充电器，提供 6.4V

– 输入和系统过压保护

过压保护

– MOSFET 过流保护

– 输入电压和电流限制支持 USB 2.0 和 USB 3.0

• 针对 LED 或主机处理器的充电状态输出

– 输入电流限值：

• 通过输入电压稳压实现的最大功率跟踪功能

100mA，150mA，500mA，900mA，1A，

• 20µA 低电池泄漏电流，支持运输模式和系统复位

1.5A，2A 和 3A

• I

C 强制 BATFET 关闭延迟（典型值 9s）

• USB OTG 1A 或 1.5A 时可调输出电压范围为

• 4.00mm x 4.00mm 超薄四方扁平无引线 (WQFN)-

4.55V 至 5.5V

24 封装

– 快速 OTG 启动（典型值 22ms）

– 5V 升压模式效率为 90%

2 应应用用

– 精确的 ±15% 断续模式过流保护

• 平板电脑，智能手机，网络设备

• 窄范围 VDC (NVDC) 电源路径管理

• 便携式音频扬声器

– 在无电池或深度电池放电时的即时系统启动

3 说说明明

– 电池充电模式中的理想二极管运行

• 薄型 1.2mm 电感 1.5MHz 开关频率

bq24298 是一款高度集成开关模式电池充电管理和系

• I

C 端口用于实现最优系统性能和状态报告

统电源路径管理器件，此器件用于续航各种智能手机和

• 具有或不具有主机管理的自主电池充电

平板电脑应用中的单节锂离子和锂聚合物电池。它的

低阻抗电源路径对开关模式运行效率进行了优化、减少

– 电池充电使能

了电池充电时间并延长了放电阶段的电池寿命。

– 电池充电预调节

– 充电终止和再充电

器器件件信信息息

(1)

• 高精度

器器件件型型号号封封装装封封装装尺尺寸寸（（标标称称值值））

– ±0.5% 充电电压调节

bq24298 WQFN (24) 4.00mm x 4.00mm

– 充电电流调节范围为 ±7%

(1) 如需了解所有可用封装，请见数据表末尾的可订购产品附录。

– 输入电流调节范围为 ±7.5%

PSEL 连连接接 PHY，，通通过过 SDP/DCP 充充电电并并带带有有可可选选

– USB OTG 升压模式下 ± 3% 输出电压调节范围

BATFET 使使能能接接口口

• 高集成

– 电源路径管理

– 同步开关 MOSFET

– 集成电流感测

– 阴极负载二极管

– 内部环路补偿

• 安全性

– 针对 OTG 模式中充电和放电的电池温度感测

– 电池充电安全定时器

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

English Data Sheet: SLUSC59

bq24298

ZHCSDK7 –APRIL 2015

www.ti.com.cn

目目录录

8.4 Device Functional Modes........................................ 25

1 特特性性.......................................................................... 1

8.5 Programming........................................................... 27

2 应应用用.......................................................................... 1

8.6 Register Map........................................................... 30

3 说说明明.......................................................................... 1

9 Application and Implementation ........................ 37

4 修修订订历历史史记记录录 ........................................................... 2

9.1 Application Information............................................ 37

5 说说明明（（续续））............................................................... 3

9.2 Typical Application .................................................. 37

6 Pin Configuration and Functions......................... 4

10 Power Supply Recommendations ..................... 41

7 Specifications......................................................... 5

11 Layout................................................................... 41

7.1 Absolute Maximum Ratings ...................................... 5

11.1 Layout Guidelines ................................................. 41

7.2 ESD Ratings ............................................................ 5

11.2 Layout Example .................................................... 42

7.3 Recommended Operating Conditions....................... 6

12 器器件件和和文文档档支支持持 ..................................................... 43

7.4 Thermal Information.................................................. 6

12.1 文档支持 ............................................................... 43

7.5 Electrical Characteristics........................................... 6

12.2 Community Resources.......................................... 43

7.6 Timing Requirements.............................................. 10

12.3 商标 ....................................................................... 43

7.7 Typical Characteristics............................................ 10

12.4 静电放电警告......................................................... 43

8 Detailed Description............................................ 13

12.5 术语表 ................................................................... 43

8.1 Overview ................................................................. 13

13 机机械械封封装装和和可可订订购购信信息息 .......................................... 43

8.2 Functional Block Diagram ....................................... 14

8.3 Feature Description................................................. 15

4 修修订订历历史史记记录录

日日期期修修订订版版本本注注释释

2015 年 4 月 * 最初发布。

bq24298

www.ti.com.cn

ZHCSDK7 –APRIL 2015

5 说说明明（（续续））

具有充电和系统设置的 I

C 串行接口使得此器件成为一个真正的灵活解决方案。

该器件支持 3.9V-6.2V USB 输入电源，包括具有 6.4V 过压保护功能的标准 USB 主机端口和 USB 充电端口。

该器件支持 USB 2.0 和 USB 3.0 电源规范，具有输入电流和电压调节功能。为了设定默认输入电流限

值，bq24298 从系统检测电路（如 USB PHY 器件）中获取结果。该器件还具有快速启动功能和高达 1.5A 的精确

限流能力，能够为 VBUS 提供 4.55V-5.5V（默认 5V）可调电压，支持 USB On-the-Go 运行。

电源路径管理将系统电压调节为稍稍高于电池电压，但是又不会下降到低于 3.5V 最小系统电压（可编程）。借助

于这个特性，即使在电池电量完全耗尽或者电池被拆除时，系统也能保持运行。当达到输入源电流或电压限值时，

电源路径管理自动将充电电流减少为零，然后开始对电池放电，直到满足系统的电源需求。这个充电模式操作可保

证输入源不会过载。

此器件在主机控制不可用时开始且完成一个充电周期。它分三个阶段对电池进行自动充电：预调节、恒定电流和恒

定电压。在充电周期的末尾，当充电电流低于在恒定电压阶段中预设定的限值时，充电器自动终止。之后，当电

池电压下降到低于再充电阈值时，充电器将自动启动另外一个充电周期。

此充电器件提供针对电池充电和系统运行的多种安全特性，其中包括负温度系数热敏电阻监视、充电安全性定时器

和过压/过流保护。当结温超过 120°C（可设定）时，热调节减少充电电流。

STAT 输出报告充电状态和任何故障条件。当故障发生时，INT 立即通知主机。

bq24298 采用 24 引脚 4.00x4.00 mm 超薄 WQFN 封装。

STAT

SCL

SDA

VBUS

PMID

REGN

PGND

SYS

OTG

INT

7 8 9

BAT

BTST

1920

11 12

VBUS

PSEL

ILIM

QON

bq24298

ZHCSDK7 –APRIL 2015

www.ti.com.cn

6 Pin Configuration and Functions

24-Pin WQFN

RTW Package

(Top View)

Pin Functions

TYPE DESCRIPTION

NAME NUMBER

VBUS 1,24 P Charger Input Voltage. The internal n-channel reverse block MOSFET (RBFET) is connected between VBUS and

PMID with VBUS on source. Place a 1-µF ceramic capacitor from VBUS to PGND and place it as close as possible

to IC.

PSEL 2 I Power source selection input. High indicates a USB host source and Low indicates an adapter source.

PG 3 O Open drain active low power good indicator. Connect to the pull up rail via 10-kΩ resistor. LOW indicates a good

input source if the input voltage is between UVLO and ACOV, above SLEEP mode threshold, and current limit is

above 30 mA.

STAT 4 O Open drain charge status output to indicate various charger operation. Connect to the pull up rail via 10-kΩ resistor.

LOW indicates charge in progress. HIGH indicates charge complete or charge disabled. When any fault condition

occurs, STAT pin in the charge blinks at 1 Hz.

SCL 5 I

C Interface clock. Connect SCL to the logic rail through a 10-kΩ resistor.

SDA 6 I/O

C Interface data. Connect SDA to the logic rail through a 10-kΩ resistor.

INT 7 O Open-drain Interrupt Output. Connect the INT to a logic rail via 10kΩ resistor. The INT pin sends active low, 256-µs

pulse to host to report charger device status and fault.

OTG 8 I USB current limit selection pin during buck mode, and active high enable pin during boost mode.

Digital

For bq24298, when in buck mode with USB host (PSEL = High), when OTG = High, IIN limit = 500 mA and when

OTG = Low, IIN limit = 100 mA.

The boost mode is activated when the REG01[5] = 1 and OTG pin is High.

CE 9 I Active low Charge Enable pin. Battery charging is enabled when REG01[5:4] = 01 and CE pin = Low. CE pin must

be pulled high or low.

ILIM 10 I ILIM pin sets the maximum input current limit by regulating the ILIM voltage at 1 V. A resistor is connected from

ILIM pin to ground to set the maximum limit as I

INMAX

= (1V/R

ILIM

) × K

ILIM

. The actual input current limit is the lower

one set by ILIM and by I

C REG00[2:0]. The minimum input current programmed on ILIM pin is 500 mA.

TS 11 I Temperature qualification voltage input. Connect a negative temperature coefficient thermistor. Program

temperature window with a resistor divider from REGN to TS to GND. Charge suspends or Boost disable when TS

Analog

pin is out of range. A 103AT-2 thermistor is recommended.

QON 12 I BATFET enables control in shipping mode and BATFET reset function. Logic high to low transition on this pin with

at least t

QON_ON_1

deglitch turns on BATFET to exit shipping mode. It has internal pull up to maintain default high

logic.

When VBUS is not plugged-in, a logic low of at least t

QON_RST

will reset SYS power by turning BATFET off for

BATFET_RST

and then re-enable BATFET after t

BATFET_RST

duration. The pin integrates a pull-up resistor of typical 187

kΩ.

bq24298

www.ti.com.cn

ZHCSDK7 –APRIL 2015

Pin Functions (continued)

TYPE DESCRIPTION

NAME NUMBER

BAT 13,14 P Battery connection point to the positive pin of the battery pack. The internal BATFET is connected between BAT

and SYS. Connect a 10 µF closely to the BAT pin.

SYS 15,16 I System connection point. The internal BATFET is connected between BAT and SYS. When the battery falls below

the minimum system voltage, switch-mode converter keeps SYS above the minimum system voltage. The SYS pin

has a built-in load to ground which may discharge 330-µF load to less than 0.3 V within 250 ms typically.

PGND 17,18 P Power ground connection for high-current power converter node. Internally, PGND is connected to the source of the

n-channel LSFET. On PCB layout, connect directly to ground connection of input and output capacitors of the

charger. A single point connection is recommended between power PGND and the analog GND near the IC PGND

pin.

SW 19,20 O Switching node connecting to output inductor. Internally SW is connected to the source of the n-channel HSFET and

the drain of the n-channel LSFET. Connect the 0.047-µF bootstrap capacitor from SW to BTST.

BTST 21 P PWM high side driver positive supply. Internally, the BTST is connected to the anode of the boost-strap diode.

Connect the 0.047-µF bootstrap capacitor from SW to BTST.

REGN 22 P PWM low side driver positive supply output. Internally, REGN is connected to the cathode of the boost-strap diode.

Connect a 4.7-µF (10-V rating) ceramic capacitor from REGN to analog GND. The capacitor should be placed close

to the IC. REGN also serves as bias rail of TS pin.

Thermal Pad P Exposed pad beneath the IC for heat dissipation. Always solder thermal pad to the board, and have vias on the

thermal pad plane star-connecting to PGND and ground plane for high-current power converter.

7 Specifications

7.1 Absolute Maximum Ratings

(1)

MIN MAX UNIT

VBUS (converter not switching) –2 15

(2)

PMID (converter not switching) –0.3 15

(2)

STAT, PG –0.3 12 V

BTST –0.3 12 V

SW –2 7 V

Voltage 8 (Peak

(with respect to GND) for 20ns

duration)

BAT, SYS (converter not switching) –0.3 6 V

SDA, SCL, INT, OTG, ILIM, REGN, TS, QON, CE PSEL –0.3 7 V

BTST TO SW –0.3 7 V

PGND to GND –0.3 0.3 V

Output sink current INT, STAT, PG 6 mA

Junction temperature –40 150 °C

Storage temperature range, T

stg

–65 150 °C

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage

values are with respect to the network ground pin unless otherwise noted.

(2) VBUS is specified up to 16 V for a maximum of 24 hours under no load conditions.

7.2 ESD Ratings

VALUE UNIT

Human body model (HBM), per ANSI/ESDA/JEDEC JS-001

(1)

1000 V

(ESD)

Electrostatic discharge

Charged device model (CDM), per JEDEC specification JESD22-

250 V

C101

(2)

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

剩余49页未读，继续阅读

nobita134

粉丝: 120
资源: 11

会员权益专享

BQ24298USB 充电器 datasheet 电路参考图

评论0

会员权益专享

最新资源

BQ24298USB 充电器 datasheet 电路参考图

评论0

GL857L英文版手册

USB Hub原理图 基于GL850芯片的

BQ25895 I2C程序代码

bq2560x datasheet

bq76952 datasheet

pd充电器电路原理图

bq24071电路图

bq25700a不充电

充电电路怎么接入基于BQ76920的保护电路

bq76920均衡充电

bq76920充电的时候电源接哪里啊

bq24133可以无线充电吗

基于STM32设计一个充电

bq40z50电路设计

BQ76930电路原理

bq24610充电和充满电

充电芯片bq25895中文数据手册

bq79616芯片电路

想要一份bq27210 的设计电路图

BQ24315电路中如何应用

会员权益专享

最新资源

USB Hub原理图基于GL850芯片的