• Menu
  • Product
  • Email
  • PDF
  • Order now

  • 具有电源路径和基于电压 TS 的 BQ2407xT 独立型 1 节电池 1.5A 线性电池充电器

    • ZHCSKH8C December   2009  – December 2019 BQ24072T , BQ24075T , BQ24079T

      PRODUCTION DATA.  

  • CONTENTS
  • SEARCH
  • 具有电源路径和基于电压 TS 的 BQ2407xT 独立型 1 节电池 1.5A 线性电池充电器
  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     简化电路
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Device Options
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Undervoltage Lockout (UVLO)
      2. 9.3.2  Overvoltage Protection (OVP)
      3. 9.3.3  Dynamic Power-Path Management
      4. 9.3.4  Battery Charging
      5. 9.3.5  Charge Current Translator
      6. 9.3.6  Battery Detection and Recharge
      7. 9.3.7  Termination Disable (TD Input, BQ24072T)
      8. 9.3.8  Battery Disconnect (SYSOFF Input)
      9. 9.3.9  Dynamic Charge Timers (TMR Input)
      10. 9.3.10 Status Indicators (PGOOD, CHG)
      11. 9.3.11 Thermal Regulation and Thermal Shutdown
      12. 9.3.12 Battery Pack Temperature Monitoring
    4. 9.4 Device Functional Modes
      1. 9.4.1 Input Source Connected (Adapter or USB)
        1. 9.4.1.1 Input DPM Mode (VIN-DPM)
        2. 9.4.1.2 DPPM Mode
        3. 9.4.1.3 Battery Supplement Mode
      2. 9.4.2 Input Source Not Connected
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Using the BQ24075T, BQ24079T to Disconnect the Battery from the System
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Program the Fast Charge Current (ISET):
          2. 10.2.1.2.2 Program the Input Current Limit (ILIM):
          3. 10.2.1.2.3 Program 6.25-hour Fast-Charge Safety Timer (TMR):
          4. 10.2.1.2.4 TS Function:
          5. 10.2.1.2.5 CHG and PGOOD LED Status:
          6. 10.2.1.2.6 Processor Monitoring Status:
          7. 10.2.1.2.7 System ON/OFF (SYSOFF):
          8. 10.2.1.2.8 Selecting IN, OUT and BAT Capacitors
        3. 10.2.1.3 Application Curves
      2. 10.2.2 BQ24072T in a Host Controlled Charger Application
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedures
          1. 10.2.2.2.1 Termination Disable:
        3. 10.2.2.3 Application Curves
  11. 11Power Supply Recommendations
    1. 11.1 Power On
      1. 11.1.1 Half-Wave Adapters
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Package
  13. 13器件和文档支持
    1. 13.1 器件支持
      1. 13.1.1 第三方产品免责声明
    2. 13.2 相关链接
    3. 13.3 接收文档更新通知
    4. 13.4 支持资源
    5. 13.5 商标
    6. 13.6 静电放电警告
    7. 13.7 Glossary
  14. 14机械、封装和可订购信息
  15. 重要声明
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

具有电源路径和基于电压 TS 的 BQ2407xT 独立型 1 节电池 1.5A 线性电池充电器

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

  • 完全符合 USB 充电器标准
  • 最大输入电流可选 100mA 和 500mA
  • 100mA 最大电流限制可确保充电符合 USB-IF 标准
  • 基于输入的动态电源管理 (VIN-DPM)，用于保护免受不良 USB 电源损害
  • 28V 输入额定值，具有过压保护功能
  • 集成动态电源路径管理 (DPPM) 功能可同时独立进行系统供电和对电池充电
  • 系统输出跟踪电池电压 (BQ24072T)
  • 借助电流监控输出 (ISET) 功能可支持高达 1.5A 的充电电流
  • 针对墙上适配器的高达 1.5A 的可编程输入电流限制
  • 通过 SYSOFF 输入实现的电池断开功能
  • 反向电流、短路和热保护
  • 基于电压的 NTC 热敏电阻灵活输入
  • 专有启动序列可限制浪涌电流
  • 具有充电中/充电完成和电源正常的状态指示
  • 小型 3mm × 3mm 16 引线 VQFN 封装

2 应用

  • 智能手机
  • 掌上电脑 (PDA)
  • MP3 播放器
  • 低功耗手持设备

3 说明

BQ2407xT 系列器件是集成型锂离子线性充电器和系统电源路径管理器件，适用于空间受限的便携式 应用。该器件由 USB 端口或交流适配器供电，支持高达 1.5A 的充电电流，还具有输入过压保护功能，因此在输入电压范围内支持非稳压适配器。BQ2407xT 的 USB 输入电流限制精度和启动序列使得这款器件能够符合 USB-IF 浪涌电流规范。此外，输入动态电源管理 (VIN-DPM) 可防止充电器损毁错误配置的 USB 电源。

BQ2407xT 具有 动态电源路径管理 (DPPM) 功能，可在为系统供电的同时独立为电池充电。当输入电流限制引起系统输出降至 DPPM 阈值时，DPPM 电路将减少充电电流；因此，可在为系统负载供电时随时监测充电电流。这个特性减少了电池上充放电周期的数量，可实现充电正常终止并使得系统能够在由有缺陷或者不完整的电池组供电的情况下运行。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
BQ24072T VQFN (16) 3.00mm x 3.00mm
BQ24075T
BQ24079T
  1. 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。

简化电路

BQ24072T BQ24075T BQ24079T app_sch_fp_lus937.gif

4 修订历史记录

Changes from B Revision (November 2014) to C Revision

  • 更改了数据表标题Go
  • Moved Storage temperature From: the ESD table to the Absolute Maximum RatingsGo
  • Changed the Handling Ratings table to ESD RatingsGo
  • Changed VIN-LOW To: IN-DPM in the Electrical Characteristics Power Path sectionGo
  • Changed VIN-LOW To VIN-DPM in the Functional Block DiagramGo
  • Changed: "R3 must be added.." To: "R8 must be added..." in the Battery Pack Temperature Monitoring sectionGo
  • Changed R6 From: 10 kΩ To: 19.1 kΩ and R7 From: 13.2 kΩ To: 8.25 kΩ in Figure 23Go
  • Changed text: "which for this case are R6 = 8.25 kΩ and R7 = 19.1kΩ.." To: "which for this case are R7 = 8.25 kΩ and R6 = 19.1 kΩ"Go
  • Changed Equation 8Go

Changes from A Revision (April 2010) to B Revision

  • 添加了“处理额定值”表、“特性 说明 ”部分、器件功能模式、“应用和实施”部分、“电源相关建议”部分、“布局”部分、“器件和文档支持”部分以及“机械、封装和可订购信息”部分Go
  • Deleted text from the Pin Configuration and Functions section: "Pin out designations are not final. Subject to change." Go
  • Changed VO(REG) to VBAT(REG) in Min Typ Max columns on the VRCH spec. of Electrical Characteristics table under sub section BATTERY CHARGERGo
  • Changed IOUT 5.5 V To VOUT 5.5 V in Figure 28Go

Changes from * Revision (December 2009) to A Revision

  • Added 向数据表标题添加了 BQ24072T 器件Go
  • Added 添加了 BQ24072T 特性项目符号Go
  • Added 向图形中添加了“BQ24072T”Go
  • Added BQ24072T spec. to Ordering Info tableGo
  • Added BQ24072T Pin DiagramGo
  • Added BQ24072T to VO(REG) in the Electrical Characteristics Power Path sectionGo
  • Added "BQ24072T" to VDPPM in the Electrical Characteristics tableGo
  • Added "BQ24072T" to VBAT(REG) the Electrical Characteristics tableGo
  • Added BQ24072T Termination Disable (TD) descriptionGo
  • Added graphic entity for BQ24072T DPPM and Battery Supplement ModesGo
  • Added graphic entity for BQ24072T Host Controlled Charger applicationGo
  • Added Termination Disable operation procedure.Go

5 说明 （续）

此外，该系列充电器可提供经稳压的系统输入，即使在电池完全放电的情况下，也可使系统在连接电源后实现瞬间开启。此电源路径管理架构还允许在适配器不能够发送峰值系统电流时补偿系统电流需求，从而使得能够使用较小的适配器。

电池充电发生于以下三个阶段：调节、恒定电流和恒定电压。在所有的充电阶段，一个内部控制环路监测 IC 结温并且如果超过此内部温度阈值则减少充电电流。充电器功率级和充电电流感应功能完全集成在了一起。该充电器具高精度电流和电压调节环路、充电状态显示和充电终止功能。输入电流限制和充电电流可使用外部电阻编程设定。

6 Device Options

PART NO. VOVP VBAT(REG) VOUT(REG) VDPPM OPTIONAL FUNCTION
BQ24072TRGTR 6.6 V 4.2 V VBAT + 225 mV VOREG –100 mV TD
BQ24072TRGTT 6.6 V 4.2 V VBAT + 225 mV VOREG –100 mV TD
BQ24075TRGTR 6.6 V 4.2 V 5.5 V 4.3 V SYSOFF
BQ24075TRGTT 6.6 V 4.2 V 5.5 V 4.3 V SYSOFF
BQ24079TRGTR 6.6 V 4.1 V 5.5 V 4.3 V SYSOFF
BQ24079TRGTT 6.6 V 4.1 V 5.5 V 4.3 V SYSOFF

7 Pin Configuration and Functions

BQ24072T RGT Package
QFN 16 Pin
Top View
BQ24075T and BQ24079 RGT Package
QFN 16 Pin
Top View

Pin Functions

PIN DESCRIPTION
NAME NUMBER I/O
BQ24072T BQ24075T
BQ24079T
TS 1 1 I/O External NTC Thermistor Input. Connect the TS input to the center tap of a resistor divider from VIN to GND with the NTC in parallel with the bottom resistor to monitor the NTC in the battery pack. For applications that do not utilize the TS function, set the resistor divider to be a 20% ratio. See the Battery Pack Temperature Monitoring section for details on calculating the resistor values.
BAT 2, 3 2, 3 I/O Charger Power Stage Output and Battery Voltage Sense Input. Connect BAT to the positive terminal of the battery. Bypass BAT to VSS with a 4.7μF to 47μF ceramic capacitor.
CE 4 4 I Charge Enable Active-Low Input. Connect CE to a high logic level to place the battery charger in standby mode. In standby mode, OUT is active and battery supplement mode is available. Connect /CE to a low logic level to enable the battery charger. CE is internally pulled down with ~285kΩ. Do not leave CE unconnected to ensure proper operation.
EN2 5 5 I Input Current Limit Configuration Inputs. Use EN1 and En2 to control the maximum input current and enable USB compliance. See for the description of the operation states. EN1 and EN2 are internally pulled down with ~285kΩ. Do not leave EN1 or EN2 unconnected to ensure proper operation.
EN1 6 6 I
PGOOD 7 7 O Open-Drain Power Good Status Indication Output. PGOOD pulls to VSS when a valid input source is detected. PGOOD is high-impedance when the input power is not within specified limits. Connect PGOOD to the desired logic voltage rail using a 1kΩ to 100kΩ resistor, or use with an LED for visual indication.
VSS 8 8 – Ground. Connect to the thermal pad and to the ground rail of the circuit.
CHG 9 9 O Open-Drain Charging Status Indication Output. CHG pulls to VSS when the battery is charging. CHG is high-impedance when charging is complete or when the charger is disabled. CHG flashes to indicate a timer fault. Connect CHG to the desired logic voltage rail using a 1kΩ to 100kΩ resistor, or use with an LED for visual indication.
OUT 10, 11 10, 11 O System Supply Output. OUT provides a regulated output when the input is below the OVP threshold and above the regulation voltage. When the input is out of the operation range, OUT is connected to VBAT except when SYSOFF is high. Connect OUT to the system load. Bypass OUT to VSS with a 4.7μF to 47μF ceramic capacitor.
ILIM 12 12 O Adjustable Current Limit Programming Input. Connect a 1.07kΩ to 7.5kΩ resistor from ILIM to VSS to program the maximum input current (EN2=1, EN1=0). The input current includes the system load and the battery charge current. Leaving ILIM unconnected disables all charging.
IN 13 13 I Input Power Connection. Connect IN to the external DC supply (AC adapter or USB port). The input operating range is 4.35V to 6.6V. The input accepts voltages up to 26V without damage, but operation is suspended. Bypass IN to VS with a 1μF to 10μF ceramic capacitor.
TMR 14 14 I Timer Programming Input. TMR controls the pre-charge and fast-charge safety timers. Connect TMR to VSS to disable all safety timers. Connect a 18kΩ to 72kΩ resistor between TMR and VSS to program the timers to a desired length. Leave TMR unconnected to set the timers to the default values.
SYSOFF – 15 I System Enable Input. Connect SYSOFF high to turn off the FET connecting the battery to the system output. When an adapter is connected, charge is also disabled. Connect SYSOFF low for normal operation. SYSOFF is internally pulled up to VBAT through a large resistor (~5MΩ). Do not leave SYSOFF unconnected to ensure proper operation.
TD 15 – I Termination Disable Input. Connect TD high to disable charger termination. Connect TD to VSS to enable charger termination. TD is checked during startup only and cannot be changed during operation. See the TD section in this datasheet for a description of the behavior when termination is disabled. TD is internally pulled down to VSS with ~285 kΩ. Do not leave TD unconnected to ensure proper operation.
ISET 16 16 I/O Fast Charge Current Programming Input. Connect a 590 Ω to 3 kΩ resistor from ISET to VSS to program the fast charge current level. Charging is disabled if ISET is left unconnected. While charging, the voltage ISET reflects the actual charging current and can be used to monitor charge current. See the Charge Current Translator section of this datasheet for more details.
Thermal Pad – -- – There is an internal electrical connection between the exposed thermal pad and the VSS pin of the device. The thermal pad must be connected to the same potential as the VSS pin on the printed circuit board. Do not use the thermal pad as the primary ground input for the device. VSS must be connected to ground at all times.

Table 1. EN1/EN2 Settings

EN2 EN1 MAXIMUM INPUT CURRENT INTO IN
0 0 100 mA. USB100 mode
0 1 500 mA. USB500 mode
1 0 Set by external resistor from ILIM to VSS
1 1 Standby (USB suspend mode)

8 Specifications

8.1 Absolute Maximum Ratings(1)(2)

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
Input voltage IN (with respect to VSS) –0.3 28 V
BAT (with respect to VSS) –0.3 5 V
OUT, EN1, EN2, CE, TS, ISET, PGOOD, CHG, ILIM, VREF, ITERM, SYSOFF, TD (with respect to VSS) –0.3 7 V
Input current IN 1.6 A
Output current (Continuous) OUT 5 A
BAT (Discharge mode) 5 A
BAT (Charging mode) 1.5 A
Output sink current CHG, PGOOD 15 mA
Junction temperature, TJ –40 150 °C
Storage temperature , Tstg –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.
(2) The IC operational charging life is reduced to 20,000 hours, when charging at 1.5A and 125°C. The thermal regulation feature reduces charge current if the IC’s junction temperature reaches 125°C; thus without a good thermal design the maximum programmed charge current may not be reached.

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale