ZHCSL07C September   2019  – August 2021 TPS8802

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  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 Typical Characteristics
  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  System Power-up
      2. 8.3.2  LDO Regulators
        1. 8.3.2.1 Power LDO Regulator
        2. 8.3.2.2 Internal LDO Regulator
        3. 8.3.2.3 Microcontroller LDO Regulator
      3. 8.3.3  Photo Chamber AFE
        1. 8.3.3.1 Photo Input Amplifier
        2. 8.3.3.2 Photo Gain Amplifier
      4. 8.3.4  LED Driver
        1. 8.3.4.1 LED Current Sink
        2. 8.3.4.2 LED Voltage Supply
      5. 8.3.5  Carbon Monoxide Sensor AFE
        1. 8.3.5.1 CO Transimpedance Amplifier
        2. 8.3.5.2 CO Connectivity Test
      6. 8.3.6  Boost Converter
        1. 8.3.6.1 Boost Hysteretic Control
        2. 8.3.6.2 Boost Soft Start
      7. 8.3.7  Interconnect Driver
      8. 8.3.8  Piezoelectric Horn Driver
        1. 8.3.8.1 Three-Terminal Piezo
        2. 8.3.8.2 Two-Terminal Piezo
      9. 8.3.9  Battery Test
      10. 8.3.10 AMUX
      11. 8.3.11 Analog Bias Block and 8 MHz Oscillator
      12. 8.3.12 Interrupt Signal Alerts
    4. 8.4 Device Functional Modes
      1. 8.4.1 Sleep Mode
      2. 8.4.2 Fault States
        1. 8.4.2.1 MCU LDO Fault
        2. 8.4.2.2 Over-Temperature Fault
    5. 8.5 Programming
    6. 8.6 Register Maps
      1. 8.6.1  REVID Register (Offset = 0h) [reset = 0h]
      2. 8.6.2  STATUS1 Register (Offset = 1h) [reset = 0h]
      3. 8.6.3  STATUS2 Register (Offset = 2h) [reset = 0h]
      4. 8.6.4  MASK Register (Offset = 3h) [reset = 0h]
      5. 8.6.5  CONFIG1 Register (Offset = 4h) [reset = 20h]
      6. 8.6.6  CONFIG2 Register (Offset = 5h) [reset = 2h]
      7. 8.6.7  ENABLE1 Register (Offset = 6h) [reset = 10h]
      8. 8.6.8  ENABLE2 Register (Offset = 7h) [reset = 0h]
      9. 8.6.9  CONTROL Register (Offset = 8h) [reset = 0h]
      10. 8.6.10 SLPTMR1 Register (Offset = 9h) [reset = 0h]
      11. 8.6.11 SLPTMR2 Register (Offset = Ah) [reset = 0h]
      12. 8.6.12 GPIO_AMUX Register (Offset = Bh) [reset = 0h]
      13. 8.6.13 CO_BATTEST Register (Offset = Ch) [reset = 0h]
      14. 8.6.14 CO Register (Offset = Dh) [reset = 0h]
      15. 8.6.15 VBOOST Register (Offset = Eh) [reset = F2h]
      16. 8.6.16 LEDLDO Register (Offset = Fh) [reset = 0h]
      17. 8.6.17 PH_CTRL Register (Offset = 10h) [reset = 0h]
      18. 8.6.18 LED_DAC_A Register (Offset = 11h) [reset = 0h]
      19. 8.6.19 LED_DAC_B Register (Offset = 12h) [reset = 0h]
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Photo Amplifier Component Selection
        2. 9.2.2.2 LED Driver Component Selection
        3. 9.2.2.3 LED Voltage Supply Selection
        4. 9.2.2.4 Boost Converter Component Selection
        5. 9.2.2.5 Regulator Component Selection
      3. 9.2.3 Application Curves
      4. 9.2.4 3V Battery Smoke and CO Alarm
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Photo Amplifier Layout
      2. 11.1.2 CO Amplifier Layout
      3. 11.1.3 Boost Converter Layout
      4. 11.1.4 Ground Plane Layout
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 接收文档更新通知
    2. 12.2 支持资源
    3. 12.3 Trademarks
    4. 12.4 静电放电警告
    5. 12.5 术语表
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.3.9 Battery Test

The battery test load is used to check the integrity of the battery connected to the TPS8802 device. When enabled, a load is connected to VBST. The load is programmable from 10 mA to 20 mA with the I_BATTEST register bits. This load emulates the horn driver current draw during an alarm condition. The boost input voltage, output voltage, and efficiency affect the current drawn from the battery because the battery test load is connected to VBST. Therefore, the battery current is programmable with the VBST register as well. Ensure VBST is greater than 4.5 V when enabling the battery test load. The load is enabled with the BATTEST_EN register bit or with the GPIO register bit and pin.
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