SLVSI60A September   2025  – September 2025 TPS61382-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 I2C Timing Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 VCC Power Supply and UVLO Logic
      2. 6.3.2 Enable or Shutdown
      3. 6.3.3 STATUS Pin
        1. 6.3.3.1 Status Indicator IO (STATUS Pin)
        2. 6.3.3.2 Configured as External PMOS Driver
      4. 6.3.4 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Charger Mode Description
        1. 6.4.1.1 Charger Enable
        2. 6.4.1.2 LDO Charger and Buck Charger Description
          1. 6.4.1.2.1 Buck Charger
          2. 6.4.1.2.2 LDO Charger
        3. 6.4.1.3 NiMH Battery Charging Profile
        4. 6.4.1.4 Lithium Battery Charging Profile
        5. 6.4.1.5 Super Capacitor Charging Profile
        6. 6.4.1.6 Battery Cold, Hot Temperature (TS Pin)
        7. 6.4.1.7 Charger Protection and Fault Condition Indication
      2. 6.4.2 Boost Mode Description
        1. 6.4.2.1 Enable and Start up
          1. 6.4.2.1.1 Automatic Transition into Boost Mode
          2. 6.4.2.1.2 Manual Transition into Boost Mode
        2. 6.4.2.2 Down Mode
        3. 6.4.2.3 Output Short- to-Ground Protection
        4. 6.4.2.4 Boost Control Loop
        5. 6.4.2.5 Current Limit Operation
        6. 6.4.2.6 Functional Modes at Light Load
          1. 6.4.2.6.1 Auto PFM Mode
          2. 6.4.2.6.2 Forced PWM Mode
        7. 6.4.2.7 Duty Cycle Limitation
        8. 6.4.2.8 BUB Voltage Loop
        9. 6.4.2.9 Spread Spectrum
      3. 6.4.3 Battery State-of-Health (SOH) Detection Mode Description
        1. 6.4.3.1 SOH Mode Operation
        2. 6.4.3.2 Multi-Signal Output in AVI Pin
        3. 6.4.3.3 Calculate Impedance of Back up Battery
    5. 6.5 I2C Serial Interface
      1. 6.5.1 Data Validity
      2. 6.5.2 START and STOP Conditions
      3. 6.5.3 Byte Format
      4. 6.5.4 Acknowledge (ACK) and Not Acknowledge (NACK)
      5. 6.5.5 Target Address and Data Direction Bit
      6. 6.5.6 Single Read and Write
      7. 6.5.7 Multi-Read and Multi-Write
  8. 7 Register Maps
    1. 7.1  Register 00H: CHIP_ID
    2. 7.2  Register 01H: BOOST_SET1
    3. 7.3  Register 02H: BOOST_SET2
    4. 7.4  Register 03H: BOOST_SET3
    5. 7.5  Register 04H: CHGR_SET1
    6. 7.6  Register 05H: CHGR_SET2
    7. 7.7  Register 06H: CHGR_SET3
    8. 7.8  Register 07H: CHGR_SET4
    9. 7.9  Register 08H: CHGR_STATUS
    10. 7.10 Register 09H: SOH_SET1
    11. 7.11 Register 0AH: SOH_SET2
    12. 7.12 Register 0BH: CONTROL_STATUS
    13. 7.13 Register 0CH: FAULT_CONDITION
    14. 7.14 Register 0DH: STATUS_PIN_SET
    15. 7.15 Register 0EH: SW_RST
  9. 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 Selecting the External MOSFET
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Capacitor in Back-Up Battery Side
        4. 8.2.2.4 Selecting the Output Capacitor
        5. 8.2.2.5 Loop Stability and Compensation Design
          1. 8.2.2.5.1 Small Signal Analysis
          2. 8.2.2.5.2 Loop Compensation Design
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

6.4 Device Functional Modes

TPS61382Q1 supports four operating modes for its main functions: charger mode, boost mode, State-of-Health (SOH) mode and standby mode. The power structure of each modes are depicted by figures below:

TPS61382-Q1 Standby Mode Figure 6-2 Standby Mode
TPS61382-Q1 Charger ModeFigure 6-4 Charger Mode
TPS61382-Q1 Boost ModeFigure 6-3 Boost Mode
TPS61382-Q1 SOH ModeFigure 6-5 SOH Mode

TPS61382Q1 applies AND logic on its EN pins and I2C EN bits. The boost function is enabled when EN_BST pin and BST_EN bit is both high. Charger is enabled when EN_CHGR pin is high and CHGR_SOH_EN bit is 01b. SOH is enabled when EN_CHGR pin is high and CHGR_SOH_EN bit is 10b.

Table 6-4 Operating Modes Control Logic

Boost enable: EN_BST pin AND BST_EN bit

Charger/SOH enable: EN_CHGR AND CHGR_SOH_EN bit

Device State

Device Operation

EN_BST = 0 or BST_EN = 0

EN_CHGR = 1 and CHGR_SOH_EN = 01b

Pure charger

Charger Active.
EN_BST = 0 or BST_EN = 0

EN_CHGR = 1 and CHGR_SOH_EN = 10b

Pure SOH

SOH Active.

EN_BST = 1 and BST_EN = 1

EN_CHGR = 0 or CHGR_SOH_EN=00b

 Automatic boost and standby
  • Boost Active: VOUT < BST_WAKE
  • Standby Active: VOUT > VOUT_STANDBY(106%VOUT_TARGET)
EN_BST = 1 and BST_EN = 1

EN_CHGR = 1 and CHGR_SOH_EN = 01b

Automatic boost and charger mode
  • Boost Active: VOUT < BST_WAKE

  • Charger Active: VOUT > VOUT_STANDBY(106%VOUT_TARGET)
EN_BST = 1 and BST_EN = 1

EN_CHGR = 1 and CHGR_SOH_EN = 10b

Automatic boost and SOH mode
  • Boost Active: VOUT < BST_WAKE

  • SOH Active: VOUT > VOUT_STANDBY(106%VOUT_TARGET)

When multiple functions are enabled, TPS61382Q1 monitors system voltage by VOUT pin to decide which function mode to enter. The IC stays in standby/ charger or SOH mode (depending on which function is enabled) when system voltage is sufficient and automatically transition into boost mode when car battery malfunction occurs and voltage drop on system voltage is detected. The different operation modes are shown in the Functional State Diagram.

TPS61382-Q1 Functional State Diagram Figure 6-6 Functional State Diagram
TPS61382-Q1 Automatic Boost and Standby/Charger/SOH Transition Logic Figure 6-7 Automatic Boost and Standby/Charger/SOH Transition Logic