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      參數(shù)資料
      型號: LK4601-7EPD3B1
      廠商: POWER-ONE INC
      元件分類: 電源模塊
      英文描述: 1-OUTPUT 150 W AC-DC PWR FACTOR CORR MODULE
      封裝: HEAT SINK, METAL, CASE K02
      文件頁數(shù): 19/28頁
      文件大?。?/td> 1215K
      代理商: LK4601-7EPD3B1
      K Series
      AC-DC Converters >100 Watt
      Rugged Environment
      Edition 4/4.99
      26/28
      MELCHER
      The Power Partners.
      Vo1+
      Vo1–
      V
      UV
      IV
      Rp
      Input
      11009
      V ACFAIL Signal (VME)
      Available for units with
      Uo1 = 5.1 V.
      This option denes an undervoltage monitoring circuit for
      the input or input and main output voltage equivalent to op-
      tion D and generates the ACFAIL signal (V signal) which
      conforms to the VME standard.
      The low state level of the ACFAIL signal is specied at a
      sink current of
      IV ≤ 48 mA to UV ≤ 0.6 V (open-collector out-
      put of a NPN transistor). The pull-up resistor feeding the
      open-collector output should be placed on the VME back
      plane.
      After the ACFAIL signal has gone low, the VME standard
      requires a hold-up time
      th of at least 4 ms before the 5.1 V
      output drops to 4.875 V when the output is fully loaded. This
      hold-up time
      th is provided by the internal input capaci-
      tance. See also g.:
      Hold-up Time versus Output Power.
      Table 20: Undervoltage monitor functions
      V output
      Monitoring
      Minimum adjustment
      (VME compatible)
      Ui
      Uo1
      range of threshold level
      Uti
      Uto
      V2
      yes
      no
      355V DC 1
      V3
      yes
      355V DC 1 0.95...0.985
      Uo1 2
      1 Option D monitors the boost regulator output voltage. The trig-
      ger level is adjusted in the factory to 355 V DC.
      2 Fixed value between 95% and 98.5% of Uo1.
      V output (V2, V3):
      Connector pin V is internally connected to the open collec-
      tor of a NPN transistor. The emitter is connected to the
      negative potential of output 1.
      UV ≤ 0.6 V (logic low) corre-
      sponds to a monitored voltage level (
      Ui and/or Uo1) <Ut.
      The current
      IV through the open collector should not ex-
      ceed 50 mA. The NPN output is not protected against exter-
      nal overvoltages.
      UV should not exceed 60 V.
      Ui, Uo1 status
      V output,
      UV
      Ui or Uo1 < Ut
      low, L,
      UV ≤ 0.6 V at IV = 50 mA
      Ui and Uo1 > Ut + Uh
      high, H,
      IV ≤ 25 A at UV = 5.1 V
      Fig. 39
      Output conguration of options V2 and V3
      Option V operates independently of the built-in input under-
      voltage lock-out circuit. A logic "low" signal is generated at
      pin 20 as soon as one of the monitored voltages drops be-
      low the preselected threshold level
      Ut. The return for this
      signal is Vo1–. The V output recovers when the monitored
      voltage(s) exceed(s)
      Ut + Uh. The threshold level Uti is ad-
      justed in the factory to 355 V DC. The threshold level
      Uto
      either is adjusted during manufacture to a determined cus-
      tomer specied value.
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