SLUSCO8B November   2016  – June 2018 TPS54200 , TPS54201

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Excellent Deep Dimming in ADIM
  4. 4 Revision History
  5. 5 Description (continued)
  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 Switching Characteristics
    8. 7.8 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  Fixed-Frequency PWM Control
      2. 8.3.2  Error Amplifier
      3. 8.3.3  Slope Compensation and Output Current
      4. 8.3.4  Input Undervoltage Lockout
      5. 8.3.5  Voltage Reference
      6. 8.3.6  Setting LED Current
      7. 8.3.7  Internal Soft Start
      8. 8.3.8  Bootstrap Voltage (BOOT)
      9. 8.3.9  Overcurrent Protection
        1. 8.3.9.1 High-Side MOSFET Overcurrent Protection
        2. 8.3.9.2 Low-Side MOSFET Overcurrent Protection
        3. 8.3.9.3 Low-Side MOSFET Reverse Overcurrent Protection
      10. 8.3.10 Fault Protection
        1. 8.3.10.1 LED-Open Protection
        2. 8.3.10.2 LED Short Protection
        3. 8.3.10.3 Sense-Resistor Short Protection
        4. 8.3.10.4 Sense-Resistor Open Protection
        5. 8.3.10.5 Overvoltage Protection
        6. 8.3.10.6 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable and Disable Device
      2. 8.4.2 Mode Detection
      3. 8.4.3 Analog Dimming Mode Operation
      4. 8.4.4 PWM Dimming-Mode Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 TPS5420x 12-V Input, 1.5-A, 3-Piece IR LED Driver With Analog Dimming
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Input Capacitor Selection
          3. 9.2.1.2.3 Output Capacitor Selection
          4. 9.2.1.2.4 FB Pin RC Filter Selection
          5. 9.2.1.2.5 Sense Resistor Selection
        3. 9.2.1.3 Application Curves
      2. 9.2.2 TPS5420x 24-V Input, 1-A, 4-Piece WLED Driver With PWM Dimming
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Input Capacitor Selection
          3. 9.2.2.2.3 Output Capacitor Selection
          4. 9.2.2.2.4 FB Pin RC Filter Selection
          5. 9.2.2.2.5 Sense Resistor Selection
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7.5 Electrical Characteristics

The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containing it. TJ = –40°C to 125°C, VVIN = 4.5 V to 28 V, (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
VVIN Input voltage range 4.5 28 V
IOFF Shutdown current PWM = GND 2 8.6 µA
VVIN_UVLO VIN undervoltage lockout Rising VVIN 3.83 4.2 4.47 V
Falling VVIN 3.4 3.7 3.95
Hysteresis 470 mV
DIMMING (PWM PIN)
VADIM Analog dimming-mode threshold Rising VPWM 1.97 2.07 2.17 V
Falling VPWM 1.8
VPDIM PWM dimming-mode threshold Rising VPWM 0.9 1 1.1 V
Falling VPWM 0.8
VPWM Threshold to identify PWM duty cycle Rising VPWM 0.91 1 1.12 V
Falling VPWM 0.5 0.63 0.72
VPWM_SHUTDOWN Shutdown threshold 0.35 0.55 V
FEEDBACK AND ERROR AMPLIFIER
VFB1 Feedback voltage in analog dimming mode PWM = 3.3 V, SW duty cycle > 90% 201 205 210 mV
VFB2 Feedback voltage in PWM dimming mode PWM = 1.5 V, SW duty cycle > 90% 96 100 104 mV
BOOT PIN
VBOOT_UVLO BOOT-SW UVLO threshold Rising 2.1 2.33 V
Falling 2 2.2
POWER STAGE
RHSD High-side FET on-resistance VBOOT – VSW= 6 V 150 259 mΩ
RLSD Low-side FET on-resistance VVIN> 6 V 70 120 mΩ
CURRENT LIMIT
ILIM_HS1 High-side current limit 1 Either one of the following conditions:
1. PWM dimming mode
2. Analog dimming mode and PWM duty cycle >25% 		2.4 3 3.6 A
ILIM_HS2 High-side current limit 2 Analog dimming mode and PWM duty cycle <25% 1 1.4 1.8 A
ILIM_LS_SOURCE Low-side source current limit VVIN> 6 V 2.3 3.3 4.4 A
ILIM_LS_SINK Low-side sink current limit VVIN> 6 V 1.25 1.7 2.2 A
FAULT PROTECTION
Thermal shutdown(1) Rising temperature 150 160 170 °C
Hysteresis 10 °C
VOVP Overvoltage protection 1 V
VOCP Overcurrent protection 120%
(1) Not production tested