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      參數(shù)資料
      型號: S3843P
      廠商: AUK Corp
      英文描述: Current Mode PWM Controller
      中文描述: 電流模式PWM控制器
      文件頁數(shù): 3/7頁
      文件大?。?/td> 300K
      代理商: S3843P
      KSI-L007-000
      3
      S3843P
      Electrical Characteristics(continued)
      (Vcc=15V, Rt=10Kohm, Ct=3.3nF, Ta=0
      to 70
      , Unless otherwise specified)
      Characteristic
      Symbol
      5. Output Section
      Test Condition
      Min.
      Typ. Max.
      Unit
      Output Low Level1
      V
      OL1
      Isink=20mA
      -
      0.1
      0.4
      V
      Output Low Level2
      V
      OL2
      Isink=200mA
      -
      1.5
      2.0
      V
      Output High Level1
      V
      OH1
      Isource=20mA
      13.0
      13.5
      -
      V
      Output High Level2
      V
      OH2
      Isource=200mA
      12.0
      13.5
      -
      V
      V
      OL
      (UVLO)
      -
      V
      CC
      =6V, I
      sink
      = 1mA
      Tj=25
      °
      C
      ,
      C
      1
      =1nF
      Tj=25
      °
      C
      ,
      C
      1
      =1nF
      -
      0.7
      1.2
      V
      Rise Time
      t
      r
      -
      50
      150
      nS
      Fall Time
      t
      f
      -
      50
      150
      nS
      6. Under Voltage Lockout Section
      Start Threshold
      V
      th
      -
      7.8
      8.4
      9
      V
      Min. Operating Voltage
      V
      tL
      After turn on
      7
      7.6
      8.2
      V
      7. PWM Section
      Maximum Duty Cycle
      D
      max
      -
      93
      97
      100
      %
      Minimum Duty Cycle
      D
      min
      -
      -
      -
      0
      %
      8.Total Standby Section
      Start-Up Current
      I
      st
      -
      -
      0.5
      1
      mA
      Operating Supply Current
      I
      CC
      V
      pin2
      =V
      pin3
      =0V
      -
      11
      20
      mA
      V
      CC
      Zener Voltage
      V
      Z
      I
      CC
      =25mA
      -
      35
      -
      V
      NOTE: Adjust Vcc above the start threshold before setting at 15V
      Block Diagram
      1
      2
      3
      4
      8
      7
      5
      7
      6
      5
      -
      +
      Bias
      Internal
      V ref
      5V
      Reset
      Set/
      LOGIC
      Oscillator
      1V
      LATCH
      R
      S
      1/3
      35V
      1/2 V ref
      Error Amp
      UV LO
      C.S Comp
      PWM
      Vref
      Vcc
      Vfb
      Com
      C.S
      Rt/Ct
      GND
      PWR Vc
      Output
      PWR GND
      T
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