SNVSC75 april   2023 LM5171-Q1

ADVANCE INFORMATION  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Timing Requirements
    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  Bias Supplies and Voltage Reference (VCC, VDD, and VREF)
      2. 7.3.2  Undervoltage Lockout (UVLO) and Controller Enable or Disable
      3. 7.3.3  High Voltage Inputs (HV1, HV2)
      4. 7.3.4  Current Sense Amplifier
      5. 7.3.5  Control Commands
        1. 7.3.5.1 Channel Enable Commands (EN1, EN2)
        2. 7.3.5.2 Direction Command (DIR1 and DIR2)
        3. 7.3.5.3 Channel Current Setting Commands (ISET1 and ISET2)
      6. 7.3.6  Channel Current Monitor (IMON1, IMON2)
        1. 7.3.6.1 Individual Channel Current Monitor
        2. 7.3.6.2 Multiphase Total Current Monitoring
      7. 7.3.7  Cycle-by-Cycle Peak Current Limit (IPK)
      8. 7.3.8  Inner Current Loop Error Amplifier
      9. 7.3.9  Outer Voltage Loop Error Amplifier
      10. 7.3.10 Soft Start, Diode Emulation, and Forced PWM Control (SS/DEM1 and SS/DEM2)
        1. 7.3.10.1 Soft-Start Control by the SS/DEM Pins
        2. 7.3.10.2 DEM Programming
        3. 7.3.10.3 FPWM Programming and Dynamic FPWM and DEM Change
        4. 7.3.10.4 SS Pin as the Restart Timer
      11. 7.3.11 Gate Drive Outputs, Dead Time Programming and Adaptive Dead Time (HO1, HO2, LO1, LO2, DT/SD)
      12. 7.3.12 Emergent Latched Shutdown (DT/SD)
      13. 7.3.13 PWM Comparator
      14. 7.3.14 Oscillator (OSC)
      15. 7.3.15 Synchronization to an External Clock (SYNCI, SYNCO)
      16. 7.3.16 Overvoltage Protection (OVP)
      17. 7.3.17 Multiphase Configurations (SYNCO, OPT)
        1. 7.3.17.1 Multiphase in Star Configuration
        2. 7.3.17.2 Daisy-Chain Configurations for 2, 3, or 4 Phases parallel operations
        3. 7.3.17.3 Daisy-Chain configuration for 6 or 8 phases parallel operation
      18. 7.3.18 Thermal Shutdown
    4. 7.4 Programming
      1. 7.4.1 Dynamic Dead Time Adjustment
      2. 7.4.2 UVLO Programming
    5. 7.5 I2C Serial Interface
      1. 7.5.1 REGFIELD Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Small Signal Model
        1. 8.1.1.1 Current Loop Small Signal Model
        2. 8.1.1.2 Current Loop Compensation
        3. 8.1.1.3 Voltage Loop Small Signal Model
        4. 8.1.1.4 Voltage Loop Compensation
    2. 8.2 Typical Application
      1. 8.2.1 60-A, Dual-Phase, 48-V to 12-V Bidirectional Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Determining the Duty Cycle
          2. 8.2.1.2.2  Oscillator Programming
          3. 8.2.1.2.3  Power Inductor, RMS and Peak Currents
          4. 8.2.1.2.4  Current Sense (RCS)
          5. 8.2.1.2.5  Current Setting Limits (ISETx)
          6. 8.2.1.2.6  Peak Current Limit
          7. 8.2.1.2.7  Power MOSFETS
          8. 8.2.1.2.8  Bias Supply
          9. 8.2.1.2.9  Boot Strap
          10. 8.2.1.2.10 OVP
          11. 8.2.1.2.11 Dead Time
          12. 8.2.1.2.12 Channel Current Monitor (IMONx)
          13. 8.2.1.2.13 UVLO Pin Usage
          14. 8.2.1.2.14 HVx Pin Configuration
          15. 8.2.1.2.15 Loop Compensation
          16. 8.2.1.2.16 Soft Start
          17. 8.2.1.2.17 PWM to ISET Pins
        3. 8.2.1.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Examples
  9. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • AEC-Q100 qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C ambient operating range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-Capable
  • 85-V HV-port and 80-V LV-port max ratings
  • 1% Typical Accuracy of bidirectional current regulation
  • 1% Typical Accuracy of channel current monitoring
  • I2C Interface for monitoring and diagnosis
  • Built-in 3.5V 1% reference voltage
  • Integrated 5V 10mA bias supply
  • 5-A Peak half-bridge gate drivers
  • Programmable or adaptive dead-time control
  • Programmable oscillator frequency up to 1MHz with optional synchronization to external clock
  • Independent channel enabling control inputs
  • Integrated both current and voltage loop control
  • Programmable cycle-by-cycle peak current limit
  • Over-temperature shutdown
  • HV and LV port overvoltage protection
  • Dynamically selectable diode emulation and forced PWM operation modes
  • Programmable soft-start timer
  • Support both multiphase and independent channel operations
  • Support urgent shutdown latch