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  • TPS92830-Q1 3 通道大电流线性 LED 控制器

    • ZHCSGY7B October   2017  – January 2018 TPS92830-Q1

      PRODUCTION DATA.  

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  • TPS92830-Q1 3 通道大电流线性 LED 控制器
  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     简化原理图
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Device Bias
        1. 8.3.1.1 Power-On-Reset (POR)
        2. 8.3.1.2 Current Reference (IREF)
        3. 8.3.1.3 Low-Current Fault Mode
      2. 8.3.2 Charge Pump
        1. 8.3.2.1 Charge Pump Architecture
      3. 8.3.3 Constant-Current Driving
        1. 8.3.3.1 High-Side Current Sense
        2. 8.3.3.2 High-Side Current Driving
        3. 8.3.3.3 Gate Overdrive Voltage Protection
        4. 8.3.3.4 High-Precision Current Regulation
        5. 8.3.3.5 Parallel MOSFET Driving
      4. 8.3.4 PWM Dimming
        1. 8.3.4.1 Supply Dimming
        2. 8.3.4.2 PWM Dimming by Input
        3. 8.3.4.3 Internal Precision PWM Generator
        4. 8.3.4.4 Full Duty-Cycle Switch
      5. 8.3.5 Analog Dimming
        1. 8.3.5.1 Analog Dimming Topology
        2. 8.3.5.2 Internal High-Precision Pullup Current Source
      6. 8.3.6 Output Current Derating
        1. 8.3.6.1 Output-Current Derating Topology
      7. 8.3.7 Diagnostics and Fault
        1. 8.3.7.1 LED Short-to-GND Detection
        2. 8.3.7.2 LED Short-to-GND Auto Retry
        3. 8.3.7.3 LED Open-Circuit Detection
        4. 8.3.7.4 LED Open-Circuit Auto Retry
        5. 8.3.7.5 Dropout-Mode Diagnostics
        6. 8.3.7.6 Overtemperature Protection
        7. 8.3.7.7 FAULT Bus Output With One-Fails–All-Fail
        8. 8.3.7.8 Fault Table
    4. 8.4 Device Functional Modes
      1. 8.4.1 Undervoltage Lockout, V(IN) < V(UVLO)
      2. 8.4.2 Normal Operation (V(IN) ≥ 4.5 V, V(IN) > V(LED) + 0.5 V)
      3. 8.4.3 Low-Voltage Dropout
      4. 8.4.4 Fault Mode (Fault Is Detected)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application for Automotive Exterior Lighting With One-Fails–All-Fail
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 High-Precision Dual-Brightness PWM Generation
        1. 9.2.2.1 Dual-Brightness Application
        2. 9.2.2.2 Design Requirements
        3. 9.2.2.3 Detailed Design Procedure
        4. 9.2.2.4 Application Curve
      3. 9.2.3 Driving High-Current LEDs With Parallel MOSFETs
        1. 9.2.3.1 Application Curves
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 接收文档更新通知
    2. 11.2 社区资源
    3. 11.3 商标
    4. 11.4 静电放电警告
    5. 11.5 Glossary
  12. 12机械、封装和可订购信息
  13. 重要声明
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DATA SHEET

TPS92830-Q1 3 通道大电流线性 LED 控制器

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

  • 符合 AEC-Q100 标准
    • 器件温度等级 1：环境运行温度范围为 -40°C 至 125°C
    • 器件人体放电模型 (HBM) 静电防护 (ESD) 分类等级 H2
    • 器件组件充电模型 (CDM) ESD 分类等级 C4B
  • 4.5V 至 40V 的宽电压输入范围
  • 3 通道高侧电流驱动和检测
    • 通道独立的电流设置
    • 通道独立的 PWM 输入
    • 通过 PWM 输入和电源实现 PWM 调光
    • 针对 EMC 优化的压摆率
  • 高精度 LED 驱动
    • 采用外部 N 沟道 MOSFET 的精密电流调节（2.5% 容差）
    • 具有非板载 Bin 电阻支持的 20:1 模拟调光配置
    • 具有全占空比屏蔽的精密 PWM 发生器（2% 容差）
    • 用于同步的开漏 PWM 输出
  • 保护和诊断
    • 用于外部 MOSFET 热保护的可调节输出电流降额
    • 具有自动恢复功能的 LED 灯串开路或短路诊断
    • 针对低电压运行支持诊断并具有可调节阈值
    • 多达 15 个器件的故障总线，可配置为连带失效或仅失效的通道关闭
    • 故障模式下具有较低的静态电流（每个器件小于 0.75mA）
  • 工作结温范围：-40°C 至 150°C
  • TSSOP 28 封装 (PW)

2 应用

  • 后灯 – 尾灯和制动灯、后转向灯、雾灯、倒车灯
  • 前灯 – 位置灯、日间行车灯、前转向灯、近光灯

3 说明

在实现更佳的灯光均匀性的趋势下，高电流 LED 通常用于汽车前灯和后灯（配备灯光扩散器和导光板）。同时，为了满足严格的 EMC 和可靠性要求，线性 LED 驱动器广泛用于汽车 应用。不过，通过集成功率晶体管为线性 LED 驱动器提供高电流是一项挑战。TPS92830-Q1 器件是一款先进的汽车级高侧恒定电流线性 LED 控制器，通过使用外部 N 沟道 MOSFET 提供高电流。该器件具有一整套用于 汽车 应用的 功能， 并与各种 N 沟道 MOSFET 兼容。

TPS92830-Q1 器件的每个通道可以通过感应电阻器值独立设置通道电流。内部精密恒定电流调节环路通过感应电阻器上的电压感应通道电流，并相应地控制 N 沟道 MOSFET 的栅极电压。该器件还集成了一个两级电荷泵，用于低压降运行。电荷泵电压足够高，可以支持各种 N 沟道 iMOSFET。iPWM i调光i允许使用i多个

器件信息(1)

器件型号 封装 封装尺寸（标称值）
TPS92830-Q1 TSSOP (28) 9.70mm x 4.40mm
  1. 要了解所有可用封装，请见数据表末尾的可订购产品附录。

简化原理图

TPS92830-Q1 page1_SLIS178.gif

4 修订历史记录

Changes from A Revision (October 2017) to B Revision

  • Changed timing specification for PWM duty cycleGo

Changes from * Revision (July 2017) to A Revision

  • 在特性 部分中更改了电流调节和 PWM 发生器的容差Go
  • Changed values for several parameters throughout the Electrical Characteristics tableGo
  • Changed parameter definitions for I(DRV_source) and I(DRV_sink) in the Electrical Chaaracteristics tableGo
  • Changed parameter symbols for analog dimming accuracy in the Electrical Characteristics tableGo
  • Changed parameter descriptions for V(OPEN_th_rising), V(OPEN_th_falling),Go
  • Changed parameter descriptions for t(SG_retry_OFF) and t(OPEN_retry_OFF) in the Timing Requirements tableGo
  • Added a condition for Typical CharacteristicFigure 6Go
  • Deleted a condition from Typical CharacteristicFigure 8Go
  • Deleted a Fast Power Down and Slow Power Up typical characteristic graphGo
  • Added a Fast Power Down and Slow Power Up typical characteristic graphGo
  • Added a condition for Typical CharacteristicFigure 17Go
  • Added a condition for Typical CharacteristicFigure 18Go
  • Changed heat dissipation to current distribution in Parallel MOSFET DrivingGo
  • Deleted a sentence from the PWM Dimming by Input sectionGo
  • Added resistor and capacitor reference designatorsGo
  • Deleted percentage values for V(ICTRL_LIN_BOT) and V(ICTRL_LIN_TOP) in the Analog Dimming Topology sectionGo
  • Changed V(SG_th_rising) and V(SG_th_falling) with each other in the LED Short-to-GND Detection sectionGo
  • Changed symbol of short-to-ground retry current to I(Retry_short)Go
  • Changed symbol of LED-open retry current to I(Retry_open) in the LED Open-Circuit Auto Retry sectionGo
  • Changed some FAULT TYPE names in Table 4Go
  • Updated application schematic. Go
  • Changed the value of R8 from 75 kΩ to 76 kΩ for the PWM threshold settingGo
  • Changed the equation for calculating K(RES_DiagEn)Go
  • Changed the values of R13 and R6 for Go
  • Changed the equation for calculating K(RES_DERATE)Go
  • Changed component values inthe PWM equations of the Detailed Design ProcedureGo
  • Added an application curveGo
  • Added text in the Layout Guidelines for keeping LED ground separate from device groundGo

5 说明 （续）

源以实现灵活性 - 内部 PWM 发生器、外部 PWM 输入或电源调光。各种专为汽车应用 设计的 诊断和保护可 帮助 提高系统稳健性和易用性。连带失效故障总线支持 TPS92830-Q1 与 TPS92630-Q1、TPS92638-Q1 和 TPS9261x-Q1 系列一同运行，以满足各种故障处理要求。

 
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