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LR8N3-G Datasheet

  • LR8N3-G

  • High Input Voltage Adjustable 3-Terminal Linear Regulator

  • 9頁

  • SUPERTEX   SUPERTEX

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LR8
High Input Voltage
Adjustable 3-Terminal Linear Regulator
Features
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13.2V to 450V input voltage range
Adjustable 1.20V to 440V output regulation
5% output voltage tolerance
Output current limiting
10碌A(chǔ) typical ADJ current
Internal junction temperature limiting
General Description
The Supertex LR8 is a high voltage, low output current,
adjustable linear regulator. It has a wide operating input
voltage range of 13.2V to 450V. The output voltage can be
adjusted from 1.20V to 440V provided that the input voltage
is at least 12V greater than the output voltage. The output
voltage can be adjusted by means of two external resistors
R1 and R2 as shown in the typical application circuits. The
LR8 regulates the voltage difference between VOUT and ADJ
pins to a nominal value of 1.20V. The 1.20V is ampli鏗乪d by
the external resistor ratio R1 and R2. An internal constant bias
current of typically 10碌A(chǔ) is connected to the ADJ pin. This
increases V
OUT
by a constant voltage of 10碌A(chǔ) times R2.
The LR8 has current limiting and temperature limiting. The
output current limit is typically 20mA and the minimum
temperature limit is 125擄C. An output short circuit current will
therefore be limited to 20mA. When the junction temperature
reaches its temperature limit, the output current and/or output
voltage will decrease to keep the junction temperature from
exceeding its temperature limit. For SMPS start-up circuit
applications, the LR8 turns off when an external voltage
greater than the output voltage of the LR8 is applied to VOUT
of the LR8. To maintain stability, a bypass capacitor of 1.0碌F
or larger and a minimum DC output current of 500碌A(chǔ) are
required.
The device is available in TO-243AA (SOT-89), TO-252 (D-
PAK), and TO-92 packages.
Applications
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Off-line SMPS startup circuits
Adjustable high voltage constant current source
Industrial controls
Motor controls
Battery chargers
Power supplies
Typical Application Circuit
*
V
OUT
VIN
VIN
V
OUT
ADJ
R1
C2
R2
R
LOAD
LR8
C1
*Required for conditions where V
IN
is less than V
OUT
.

LR8N3-G 產(chǎn)品屬性

  • Supertex

  • 線性穩(wěn)壓器 - 標(biāo)準(zhǔn)

  • Adjustable

  • Positive

  • 1.2 V to 440 V

  • 0.02 A

  • 3 %

  • 480 V

  • 0.01 % / V

  • + 85 C

  • Through Hole

  • TO-92

  • 13.2 V

  • 740 mW

  • - 40 C

  • 1

  • Bulk

  • 60 dB

  • 1000

LR8N3-G相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
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    廠商
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  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUPERTEX
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUTEX [Sup...
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUPERTEX
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUTEX [Sup...
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUPERTEX
  • 英文版
    Linear Voltage Regulator IC Positive Adjustable 1 Output 1.2...
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUTEX [Sup...
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUPERTEX
  • 英文版
    Linear Voltage Regulator IC Positive Adjustable 1 Output 1.2...
  • 英文版
    High Input Voltage Adjustable 3-Terminal Linear Regulator
    SUTEX [Sup...

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