SLVS933D July   2009  – December 2020 TPS23753A

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Product Information
  6. Pin Configuration and Functions
  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: Controller Section Only
    6. 7.6 Electrical Characteristics: PoE and Control
    7. 7.7 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Pin Description
        1. 8.3.1.1  APD
        2. 8.3.1.2  BLNK
        3. 8.3.1.3  CLS
        4. 8.3.1.4  CS
        5. 8.3.1.5  CTL
        6. 8.3.1.6  DEN
        7. 8.3.1.7  FRS
        8. 8.3.1.8  GATE
        9. 8.3.1.9  RTN
        10. 8.3.1.10 VB
        11. 8.3.1.11 VC
        12. 8.3.1.12 VDD
        13. 8.3.1.13 VDD1
        14. 8.3.1.14 VSS
    4. 8.4 Device Functional Modes
      1. 8.4.1  Threshold Voltages
      2. 8.4.2  PoE Start-Up Sequence
      3. 8.4.3  Detection
      4. 8.4.4  Hardware Classification
      5. 8.4.5  Maintain Power Signature (MPS)
      6. 8.4.6  TPS23753A Operation
        1. 8.4.6.1 Start-Up and Converter Operation
        2. 8.4.6.2 PD Self-Protection
        3. 8.4.6.3 Converter Controller Features
      7. 8.4.7  Special Switching MOSFET Considerations
      8. 8.4.8  Thermal Considerations
      9. 8.4.9  FRS and Synchronization
      10. 8.4.10 Blanking – RBLNK
      11. 8.4.11 Current Slope Compensation
      12. 8.4.12 Adapter ORing
      13. 8.4.13 Protection
      14. 8.4.14 Frequency Dithering for Conducted Emissions Control
  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
      3. 9.2.3 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 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Support Resources
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Electrical Characteristics: PoE and Control

Unless otherwise noted: CS = APD = CTL = RTN, GATE open, RFRS = 60.4 kΩ, RBLNK = 249 kΩ, CVB = CVC = 0.1 μF, RDEN = 24.9 kΩ, RCLS open, VVDD-VSS = 48 V, VVDD1-RTN = 48 V, 8.5 V ≤ VVC-RTN ≤ 18 V, –40°C ≤ TJ ≤ 125°C [VSS = RTN and VDD = VDD1] or [VSS = RTN = VDD], all voltages referred to RTN. [VDD = VDD1] or [VDD1 = RTN], VVC-RTN = 0 V, all voltages referred to VSS. Typical specifications are at 25°C.
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
DEN (DETECTION) (VDD = VDD1 = RTN = VSUPPLY POSITIVE)
Detection currentMeasure ISUPPLY6264.366.5μA
VDD = 1.6 V
VDD = 10 V399406413
Detection bias currentVDD = 10 V, DEN open, Measure ISUPPLY5.212μA
VPD_DISHotswap disable threshold345V
IlkgDEN leakage currentVDEN = VDD = 57 V, Float VDD1 and RTN, Measure IDEN0.15μA
CLS (CLASSIFICATION) (VDD = VDD1 = RTN = VSUPPLY POSITIVE)
ICLSClassification current13 V ≤ VDD ≤ 21 V, Measure ISUPPLY1.82.142.4mA
RCLS = 1270 Ω1.82.142.4
RCLS = 243 Ω9.910.611.3
RCLS = 137 Ω17.618.619.4
RCLS = 90.9 Ω26.527.929.3
RCLS = 63.4 Ω3839.942
VCL_ONClassification regulator lower thresholdRegulator turns on, VDD rising1011.713V
VCL_HYSHysteresis(1)1.92.052.2
VCU_OFFClassification regulator upper thresholdRegulator turns off, VDD rising212223V
VCU_HYSHysteresis(1)0.50.771
IlkgLeakage currentVDD = 57 V, VCLS = 0 V, DEN = VSS, Measure ICLS1μA
RTN (PASS DEVICE) (VDD1 = RTN)
ON-resistance0.71.2
Current limitVRTN = 1.5 V, VDD = 48 V, Pulsed Measurement405450505mA
Inrush limitVRTN = 2 V, VDD: 0 V → 48 V, Pulsed Measurement100140180mA
Foldback voltage thresholdVDD rising1112.313.6V
IlkgLeakage currentVDD = VRTN = 100 V, DEN = VSS40μA
UVLO
UVLO_RUndervoltage lockout thresholdVDD rising33.93536.1V
UVLO_HHysteresis (1)4.44.554.7
THERMAL SHUTDOWN
Turnoff temperature135145155°C
Hysteresis(2)20°C
The hysteresis tolerance tracks the rising threshold for a given device.
These parameters are provided for reference only.