SLVSGY2 October   2023 TPS2HCS10-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
    1. 5.1 Recommended Connections for Unused Pins
  7. 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 SPI Timing Requirements
    7. 6.7 Switching Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Protection Mechanisms
        1. 8.3.1.1 Programmable Fuse Protection
        2. 8.3.1.2 Thermal Shutdown
        3. 8.3.1.3 Overcurrent Protection And Capacitive Load Charging
        4. 8.3.1.4 Reverse Battery
      2. 8.3.2 Diagnostic Mechanisms
        1. 8.3.2.1 VOUT Short-to-Battery and Open-Load
          1. 8.3.2.1.1 Detection With Channel Output (FET) Enabled
          2. 8.3.2.1.2 Detection With Channel Output Disabled
        2. 8.3.2.2 Digital Current Sense Output
          1. 8.3.2.2.1 RSNS Value and Accuracy / Resolution of Current Measurement
            1. 8.3.2.2.1.1 High Accuracy Load Current Sense
            2. 8.3.2.2.1.2 SNS Output Filter
        3. 8.3.2.3 Output Voltage and FET Temperature Sensing
    4. 8.4 Device Functional Modes
      1. 8.4.1 State Diagram
      2. 8.4.2 SLEEP
      3. 8.4.3 CONFIG/ACTIVE
      4. 8.4.4 Battery Supply Input (VBB) Under-voltage
      5. 8.4.5 LOW POWER MODE (LPM) State
      6. 8.4.6 LIMP HOME state
      7. 8.4.7 SPI Mode Operation
    5. 8.5 TPS2HC10S Registers
  10. 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 Thermal Considerations
        2. 9.2.2.2 Configuring the Capacitive Charging Mode
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PWP|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.1.3 Overcurrent Protection And Capacitive Load Charging

The device features overcurrent protection with an adjustable protection threshold programmed in the ILIM_CONFIG_CHx register. Additional programmability is introduced to account for capacitive loads and motor or lamp loads with a high inrush current. The type of load can be specified as capacitive or not using the CAP_CHRG_CHx bits in the ILIM_CONFIG_CHx register. A value other than 00 indicates capacitive load and the overcurrent protection as well as capacitive load charging behavior is defined for the time defined by the INRUSH_DURATION_CHx bits in the ILIM_CONFIG_CHx register. In these modes, the current is limited using the cap charging rate that is programmed using the ILIM_CONFIG_CHx register CAP_CHRG_DVDT [7:4] bits. A CAP_CHRG_CHx setting of 00 is used for a non-capacitive loads and here the overcurrent protection threshold is set using INRUSH_LIMIT_CHx for the time defined by the INRUSH_DURATION_CHx bits. Unlike the capacitive charging modes, the current is not limited but the channel is turned off immediately in case the threshold current is exceeded. In either type of load, the overcurrent protection is immediate turn-off once past the inrush duration phase. The normal load current behavior is shown in the Figure 8-4 for the capacitive loads and in the Figure 8-3 for the inductive or resistive loads (like heaters and motors).
GUID-20230323-SS0I-B83F-2H2F-0SKKLWGDFXZ5-low.svgFigure 8-3 Normal load current on channel enable into resistive or inductive load and overcurrent thresholds (CAP_CHRG = 00)
GUID-20230323-SS0I-HV27-KQR9-RPLQC9JGCF22-low.svgFigure 8-4 Normal load current behavior on channel enable into a capacitive load and overcurrent thresholds

An overcurrent protection event occurs when IOUTx exceeds the programmed threshold level, ICL. When IOUT reaches the current limit threshold, ICL, the channel is immediately turned off. Please note that the current may peak at a higher value (ICL_pk) than the programmed overcurrent threshold (ICL). This is due to the limitation of the speed of the over-current protection response.

Figure 8-5 shows the immediate overcurrent protection switch off behavior. The switch will retry after the fault is cleared and tRETRY has expired. When the switch retries after a shutdown event, the fault indication will remain until VOUT has risen to VBB – 1.8 V. Once VOUT has risen, the fault indication at the pin is reset and current sensing is available. If there is a short-to-ground and VOUT is not able to rise, the fault indication will remain indefinitely.

GUID-20230924-SS0I-KZ7T-K5GS-DDPCFG1GMXCP-low.svgFigure 8-5 Overcurrent Protection Response