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參數(shù)資料
| 型號(hào)： | LR8K4 |
| 廠商： | SUPERTEX INC |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | High Input Voltage Adjustable 3-Terminal Linear Regulator |
| 中文描述： | 1.2 V-440 V ADJUSTABLE POSITIVE REGULATOR, PSSO2 |
| 封裝： | TO-252, DPAK-3 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 601K |
| 代理商： | LR8K4 |
LR8
High Input Voltage
Adjustable 3-Terminal Linear Regulator
Features
12V to 450V input voltage range
Adjustable 1.20V to 440V output regulation
5% output voltage tolerance
Output current limiting
10
μ
A typical ADJ current
Internal junction temperature limiting
Applications
Off-line SMPS startup circuits
Adjustable high voltage constant current source
Industrial Controls
Motor controls
Battery chargers
Power supplies
General Description
The Supertex LR8 is a high voltage, low output current, adjustable
linear regulator. It has a wide operating input voltage range of
12V to 450V. The output voltage can be adjusted from 1.20V to
440V provided that the input voltage is at least 10V 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 V
OUT
and ADJ pins to a nominal value of 1.20V. The
1.20V is amplified by the external resistor ratio R1 and R2. An
internal constant bias current of typically 10
μ
A is connected to
the ADJ pin. This increases V
OUT
by a constant voltage of 10
μ
A
times R2.
The LR8 has current limiting and temperature limiting. The
output current limit is typically 15mA and the minimum temperature
limit is 125
°
C. An output short circuit current will therefore be
limited to 15mA. 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 V
OUT
of the LR8. To maintain
stability, a bypass capacitor of 1.0
μ
F or larger and a minimum DC
output current of 500
μ
A are required.
The device is available in TO-92, TO-243AA (SOT-89), and
TO-252 (D-PAK) packages.
LR8
12/03/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
LR8 Block Diagram and Typical Application
LR8
V
IN
V
OUT
ADJ
V
IN
*
*Required for conditions where V
IN
is less than V
OUT
.
R1
R2
C2
C1
R
LOAD
VOUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LR8K4-G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 450V Adj 3 Termnl RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LR8M06-SDK | 制造商:Leadtek Research Inc. 功能描述: |
| LR8N3 | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 450V Adj 3 Termnl RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LR8N3 P003 | 制造商:Supertex Inc 功能描述:Standard Regulator Pos 1.2V to 440V 0.01A 3-Pin TO-92 T/R |
| LR8N3-G | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) 450V Adj 3 Termnl RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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