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  • 具有电流检测功能的 TPS7B770x-Q1 车用单通道和双通道天线 LDO

    • ZHCSDQ2C January   2015  – September 2018 TPS7B7701-Q1 , TPS7B7702-Q1

      PRODUCTION DATA.  

  • CONTENTS
  • SEARCH
  • 具有电流检测功能的 TPS7B770x-Q1 车用单通道和双通道天线 LDO
  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     703A I2C
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Fault Detection and Protection
      2. 7.3.2  Short-Circuit and Overcurrent Protection
      3. 7.3.3  Short-to-Battery and Reverse Current Detection
      4. 7.3.4  Thermal Shutdown
      5. 7.3.5  Integrated Reverse-Polarity Protection
      6. 7.3.6  Integrated Inductive Clamp
      7. 7.3.7  Undervoltage Lockout
      8. 7.3.8  Enable (EN, EN1, and EN2)
      9. 7.3.9  Internal Voltage Regulator (VCC)
      10. 7.3.10 Current Sense Multiplexing
      11. 7.3.11 Adjustable Output Voltage (FB, FB1, and FB2)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With IN < 4.5 V
      2. 7.4.2 Operation With EN Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Capacitor
        2. 8.2.2.2 Output Capacitor
        3. 8.2.2.3 Current Sense Resistor Selection
        4. 8.2.2.4 Current-Limit Resistor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 相关文档
    2. 11.2 相关链接
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 术语表
  12. 12机械、封装和可订购信息
  13. 重要声明
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DATA SHEET

具有电流检测功能的 TPS7B770x-Q1 车用单通道和双通道天线 LDO

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

  • 符合汽车类应用的 要求
  • 具有符合 AEC-Q100 标准的下列特性：
    • 器件温度 1 级：–40°C 至 125°C 的环境运行温度范围
    • 器件人体放电模式 (HBM) 静电放电 (ESD) 分类等级 2
    • 器件组件充电模式 (CDM) ESD 分类等级 C4B
  • 具有电流检测和可调节限流功能的单通道和双通道低压降稳压器 (LDO)
  • 4.5V 至 40V 宽输入电压范围，45V 负载突降保护
  • FB 接至 GND 时进入电源开关模式
  • 1.5V 至 20V 可调节输出电压
  • 每通道输出电流高达 300mA
  • 可通过外部电阻实现可调节限流功能
  • 高精度电流检测功能，无需进一步校准即可在低电流下检测天线开路情况
  • 高电源抑制比：100Hz 时的典型值为 73dB
  • 集成反向极性保护，低至 -40V 且无需外部二极管
  • 负载电流为 100mA 时，最大压降电压为 500mV
  • 与 2.2µF 至 100µF（ESR 为 1mΩ 至 5Ω）范围内的输出电容器搭配使用时可保持稳定
  • 集成了保护和诊断功能
    • 热关断
    • 欠压锁定 (UVLO)
    • 短路保护
    • 反向电池极性保护
    • 反向电流保护
    • 输出端电池短路保护
    • 输出端感性负载钳位
    • 多通道/器件间的电流检测功能复用
    • 能够通过电流检测功能区分所有故障
  • 16 引脚 HTSSOP PowerPAD™封装

2 应用

  • 信息娱乐系统有源天线电源
  • 环视摄像头电源
  • 适用于小电流应用的高侧电源 开关

3 说明

TPS7B770x-Q1 系列器件采用具有电流检测功能的单通道和双通道高电压低压差稳压器 (LDO)，适合在 4.5V 至 40V（45V 负载突降保护）的宽输入电压范围内工作。这些器件通过一条每通道电流为 300mA 的同轴电缆为有源天线的低噪声放大器供电。每条通道还可提供 1.5V 至 20V 的可调节输出电压。

这些器件通过电流检测和错误引脚提供诊断。为监视负载电流，高侧电流检测电路提供了与检测的负载电流成比例的模拟输出。电流检测功能非常精确，无需进一步校正即可检测开路、正常和短路条件。可以在通道和器件间对电流检测进行多路复用，以节省模数转换器 (ADC) 资源。每个通道还通过外部电阻实现了可调节限流功能。

集成了反极性二极管，因此无需使用外部二极管。这些器件具有标准热关断功能、输出端电池短路保护功能以及反向电流保护功能。各通道可在电感式开关断开期间为输出端提供内部电感式钳位保护。

这些器件的工作环境温度范围为 -40°C 至 +125°C。

器件信息(1)

器件型号 封装 通道
TPS7B7701-Q1 HTSSOP (16) 单通道
TPS7B7702-Q1 HTSSOP (16) 双通道
  1. 如需了解所有可用封装，请参阅数据表末尾的封装选项附录。

703A I2C

TPS7B7701-Q1 TPS7B7702-Q1 alt_slvsce8.gif

4 修订历史记录

Changes from B Revision (November 2015) to C Revision

  • Changed NC pin description in Pin Functions table to clarify which pins are internally connected Go
  • Added row to Recommended Operating Conditions for OUT1, OUT2, and OUT regarding switched-mode operation Go
  • Changed Current-Limit Resistor Selection section for clarityGo

Changes from A Revision (May 2015) to B Revision

  • Deleted the min and max limits of –4% and 4% from the current-limit threshold voltage parameter in the Electrical Characteristics tableGo
  • Added to the current-limit accuracy table note for the programmable current-limit accuracy parameter in the Electrical Characteristics tableGo
  • Added graphs for the TPS7B7701-Q1 device in the Typical Characteristics section Go
  • Deleted the channel 2 PSRR graph in the Typical Characteristics sectionGo
  • Added additional test conditions for the 9- to 16-V Line Transient and Power Up graphs in the Typical Characteristics section Go
  • Added additional test conditions of the Power Up graphs in the Application Curves section Go

Changes from * Revision (January 2015) to A Revision

  • 发布了完整版数据表Go

5 Pin Configuration and Functions

Single-Channel TPS7B7701-Q1 PWP Package
16-Pin HTSSOP With PowerPAD
Top View
Dual-Channel TPS7B7702-Q1 PWP Package
16-Pin HTSSOP With PowerPAD
Top View

Pin Functions

PIN TYPE DESCRIPTION
NAME SINGLE-CHANNEL DUAL-CHANNEL
EN 2 — Input Active-high enable input for the OUT pin with internal pulldown.
EN1 — 2 Input Active-high enable input for the OUT1 pin with internal pulldown.
EN2 — 3 Input Active-high enable input for the OUT2 pin with internal pulldown.
ERR 9 9 Output This pin is an open-drain fault indicator for general faults.
FB 15 — Input Feedback input for setting OUT voltage. Connect FB to GND for current-limited switch operation.
FB1 — 15 Input Feedback input for setting OUT1 voltage. Connect FB1 to GND for current-limited switch operation.
FB2 — 13 Input Feedback input for setting OUT2 voltage. Connect FB2 to GND for current-limited switch operation.
GND 12 12 Ground Ground reference
IN 1 1 Power Input power-supply voltage
LIM 10 — Output Programmable current-limit pin. Connect a resistor to GND to set the current limitation level. This pin does not need an external capacitor. To set to internal current limit, short this pin to GND.
LIM1 — 10 Output Programmable current-limit pin for channel 1. Connect a resistor to GND to set the current limitation level for channel 1. This pin does not need an external capacitor. To set to internal current limit, short this pin to GND.
LIM2 — 11 Output Programmable current-limit pin for channel 2. Connect a resistor to GND to set the current limitation level for channel 2. This pin does not need an external capacitor. To set to internal current limit, short this pin to GND.
NC 3, 13, 14 — — Not connected. Connect the NC pins to ground or leave floating.
6, 7, 11 — — Internally connected. These pins must either be floated or connected to GND.
OUT 16 — Power Output voltage
OUT1 — 16 Power Output voltage 1
OUT2 — 14 Power Output voltage 2
SENSE 5 — Output Output of current sense for sensing. To set the SENSE output voltage level, connect a resistor between this pin and GND. In addition, connect a 1-µF capacitor from this pin to GND for frequency compensation of the current-sense loop. Short this pin to GND if not used.
SENSE1 — 5 Output Output of current sense for sensing. SENSE1 current is proportional to the current flow through OUT1 and SENSE 2 current is proportional to OUT2 current when SENSE_SEL and SENSE_EN are low. To set the SENSEx output voltage level, connect a resistor between this pin and GND. In addition, connect a 1-µF capacitor from the SENSEx pin to GND for frequency compensation of the current-sense loop. Short the SENSEx pin to GND if not used.
SENSE2 — 6 Output
SENSE_EN 8 8 Input This pin is the enable and disable of the current-sense pin for multiplexing, active-low enable.
SENSE_SEL — 7 Input This pin selects the current sense between channel 1 and channel 2. See Table 2 for details.
VCC 4 4 Output Internal 4.5-V regulator. Connect 1-μF ceramic capacitor between VCC and GND for frequency compensation.

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Input voltage Unregulated input, IN –40 45 V
EN, EN1, and EN2 –0.3 45 V
Regulated output(2) VCC(3)(4) –0.3 6 V
OUT1 and OUT2 –0.3 45 V
Low-voltage pins SENSE, SENSE1, and SENSE2(3)(4) –0.3 VCC + 0.3 V
LIM, LIM1, LIM2, SENSE_EN , SENSE_SEL, ERR, FB, FB1, and FB2(3)(4) –0.3 7 V
Operating junction temperature, TJ –40 150 °C
Operating ambient temperature, TA –40 125 °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, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) There is an internal diode connects between the OUT and GND pins with 300-mA DC current capability for inductive clamp protection.
(3) All voltage values are with respect to GND.
(4) Absolute maximum voltage.

 
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