• 參數(shù)資料
      型號: LMZ1301-9EPD4
      元件分類: 電源模塊
      英文描述: 1-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE
      封裝: METAL, CASE M02, MODULE
      文件頁數(shù): 14/25頁
      文件大?。?/td> 569K
      代理商: LMZ1301-9EPD4
      Cassette Style
      DC-DC Converters
      M Series
      Edition 01/01.2001
      21/25
      D Undervoltage Monitor
      The input and/or output undervoltage monitoring circuit op-
      erates independently of the built-in input undervoltage lock-
      out circuit. A logic "low" (JFET output) or "high" signal (NPN
      output) is generated at pin 5 as soon as one of the moni-
      tored voltages drops below the preselected threshold level
      Ut. The return for this signal is Vo1– (pin 23). The D output
      recovers when the monitored voltage(s) exceed(s)
      Ut+Uh.
      JFET output (D0…D4):
      Connector pin D is internally connected via the drain-
      source path of a JFET (self-conducting type) to the nega-
      tive potential of output 1.
      UD
      ≤ 0.4 V (logic low) corresponds
      to a monitored voltage level (
      Ui and/or Uo1) <Ut. The current
      ID through the JFET should not exceed 2.5 mA. The JFET is
      protected by a 0.5 W Zener diode of 8.2 V against external
      overvoltages.
      Ui, Uo1 status
      D output,
      UD
      Ui or Uo1 < Ut
      low, L,
      UD ≤ 0.4 V at ID = 2.5 mA
      Ui and Uo1 > Ut + Uh
      high, H,
      ID ≤ 25 A at UD = 5.25 V
      NPN output (D5...D9):
      Connector pin D is internally connected via the collector-
      emitter path of a NPN transistor to the negative potential of
      output 1.
      UD
      ≤ 0.4 V (logic low) corresponds to a monitored
      voltage level (
      Ui and/or Uo1) > Ut + Uh. The current ID
      through the open collector should not exceed 20 mA. The
      NPN output is not protected against external overvoltages.
      UD should not exceed 40 V.
      Ui, Uo1 status
      D output,
      UD
      Ui or Uo1 < Ut
      high, H,
      ID ≤ 25 A at UD = 40 V
      Ui and Uo1 > Ut + Uh
      low, L,
      UD ≤ 0.4 V at ID = 20 mA
      Vo1+
      Vo1–
      D
      UD
      ID
      Rp
      Input
      11007
      Table 20: Undervoltage monitor functions
      Output type
      Monitoring
      Minimum adjustment range
      Typical hysteresis
      Uh [% of Ut]
      JFET
      NPN
      Ui
      Uo1
      of threshold level
      Ut
      for
      Ut min...Ut max
      Uti
      Uto
      Uhi
      Uho
      D1
      D5
      no
      yes
      3.5 V...48 V 1
      2.3...1
      D2
      D6
      yes
      no
      Ui min...Ui max 1
      3.0...0.5
      D3
      D7
      yes
      Ui min...Ui max 1
      0.95...0.98
      Uo1 2
      3.0...0.5
      "0"
      D4
      D8
      no
      yes
      0.95...0.98
      Uo1 2
      "0"
      D0
      D9
      no
      yes
      3.5 V...48 V 3
      1.8...1
      yes
      no
      Ui min...Ui max 3 4
      2.2...0.4
      yes
      Ui min...Ui max 3 4
      0.95...0.98
      Uo1 2
      2.2...0.4
      "0"
      1 Threshold level adjustable by potentiometer (not recommended for mobile applications)
      2 Fixed value between 95% and 98% of Uo1 (tracking)
      3 Fixed value, resistor-adjusted according to customer's specifications
      ±2% at 25°C; individual type number is determined by Power-
      One
      4 Adjusted at Io nom
      Fig. 21
      Options D0...D4, JFET output
      Fig. 22
      Options D5...D9, NPN output
      Vo1+
      Vo1–
      D
      UD
      ID
      Rp
      Input
      11006
      The threshold level
      Ut is either adjustable by a potentio-
      meter, accessible through a hole in the front cover, or is fac-
      tory adjusted to a fixed value specified by the customer.
      Option D exists in various versions D0...D9 as shown in the
      following table.
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