ZHCSD93A january   2015  – december 2020 UCC28700-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
    1. 5.1 Pin Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings #GUID-6657BD5B-29CE-4F76-A6A3-BA4B57482A18/SLUSB418335
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Detailed Pin Description
        1. 7.3.1.1 VDD (Device Bias Voltage Supply)
        2. 7.3.1.2 GND (Ground)
        3. 7.3.1.3 VS (Voltage-Sense)
        4. 7.3.1.4 DRV (Gate Drive)
        5. 7.3.1.5 CS (Current Sense)
        6. 7.3.1.6 CBC (Cable Compensation)
      2. 7.3.2 Fault Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Primary-Side Voltage Regulation
      2. 7.4.2 Primary-Side Current Regulation
      3. 7.4.3 Valley-Switching
      4. 7.4.4 Start-Up Operation
  9. 8 Applications 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 Transformer Parameter Verification
        2. 8.2.2.2 Output Capacitance
        3. 8.2.2.3 VDD Capacitance, CDD
        4. 8.2.2.4 VDD Start-Up Resistance, RSTR
        5. 8.2.2.5 VS Resistor Divider, Line Compensation, and Cable Compensation
        6. 8.2.2.6 Input Bulk Capacitance and Minimum Bulk Voltage
        7. 8.2.2.7 Transformer Turns Ratio, Inductance, Primary-Peak Current
        8. 8.2.2.8 Standby Power Estimate
      3. 8.2.3 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
        1. 11.1.1.1  Capacitance Terms in Farads
        2. 11.1.1.2  Duty Cycle Terms
        3. 11.1.1.3  Frequency Terms in Hertz
        4. 11.1.1.4  Current Terms in Amperes
        5. 11.1.1.5  Current and Voltage Scaling Terms
        6. 11.1.1.6  Transformer Terms
        7. 11.1.1.7  Power Terms in Watts
        8. 11.1.1.8  Resistance Terms in Ω
        9. 11.1.1.9  Timing Terms in Seconds
        10. 11.1.1.10 Voltage Terms in Volts
        11. 11.1.1.11 AC Voltage Terms in VRMS
        12. 11.1.1.12 Efficiency Terms
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Trademarks
  13.   Mechanical, Packaging, and Orderable Information

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6.5 Electrical Characteristics

over operating free-air temperature range, VDD = 25 V, RCBC = open, –40°C ≤ TA ≤ 125°C, TJ = TA
(unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNITS
BIAS SUPPLY INPUT
IRUNSupply current, runIDRV = 0, run state2.102.65mA
IWAITSupply current, waitIDRV = 0, wait state85110µA
ISTARTSupply current, startIDRV = 0, VVDD = 18 V, start state1.01.5
IFAULTSupply current, faultIDRV = 0, fault state2.12.8mA
UNDER-VOLTAGE LOCKOUT
VVDD(on)VDD turn-on thresholdVVDD low to high17.521.023.0V
VVDD(off)VDD turn-off thresholdVVDD high to low7.708.108.45
VS INPUT
VVSRRegulating levelMeasured at no-load condition, TJ = 25°C4.014.054.09V
VVSNCNegative clamp levelIVS = -300 µA, volts below ground190250325mV
IVSBInput bias currentVVS = 4 V–0.2500.25µA
CS INPUT
VCST(max)Max CS threshold voltageVVS = 3.7 V(1)715750775mV
VCST(min)Min CS threshold voltageVVS = 4.35 V(1)230250270
KAMAM control ratioVCST(max) / VCST(min)2.753.003.15V/V
VCCRconstant-current regulating levelCC regulation constant310319329mV
KLCLine compensating current ratioIVSLS = -300 µA, IVSLS / current out of CS pin232528A/A
TCSLEBLeading-edge blanking timeDRV output duration, VCS = 1 V195235275ns
DRV
IDRSDRV source currentVDRV = 8 V, VVDD = 9 V2025mA
RDRVLSDRV low-side drive resistanceIDRV = 10 mA612Ω
VDRCLDRV clamp voltageVVDD = 35 V1416V
RDRVSSDRV pull-down in start state150200230kΩ
PROTECTION
VOVPOver-voltage thresholdAt VS input, TJ = 25°C4.524.604.68V
VOCPOver-current thresholdAt CS input1.41.51.6
IVSL(run)VS line-sense run currentCurrent out of VS pin – increasing190220260µA
IVSL(stop)VS line-sense stop currentCurrent out of VS pin – decreasing708095
KVSLVS line-sense ratioIVSL(run) / IVSL(stop)2.502.803.05A/A
TJ(stop)Thermal shut-down temperatureInternal junction temperature165°C
CABLE COMPENSATION
VCBC(max)Cable compensation maximum voltageVoltage at CBC at full load2.83.03.4V
VCVS(min)Compensation at VSVCBC = open, change in VS regulating level at full load–45–1525mV
VCVS(max)Maximum compensation at VSVCBC = 0 V, change in VS regulating level at full load275320365
(1) These devices automatically vary the control frequency and current sense thresholds to improve EMI performance, these threshold voltages and frequency limits represent average levels.
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