LR8K4, LR8K4-G, LR8M Selling Leads, Datasheet
MFG:SUPERTEX Package Cooled:TO-252 D/C:08+/09+
LR8K4, LR8K4-G, LR8M Datasheet download
Part Number: LR8K4
MFG: SUPERTEX
Package Cooled: TO-252
D/C: 08+/09+
LR8K4, LR8K4-G, LR8M
- Table of contents:
Info of LR8K4
Info of LR8K4-G
Info of LR8M
Attentive hint
Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.
Top Sellers:
TOP
About LR8K4
PDF/DataSheet Download
Datasheet: LR8K4
File Size: 616306 KB
Manufacturer: SUTEX [Supertex, Inc]
Download : Click here to Download
About LR8K4-G
PDF/DataSheet Download
Datasheet: LR8K4-G
File Size: 714123 KB
Manufacturer: SUTEX [Supertex, Inc]
Download : Click here to Download
About LR8K4
PDF/DataSheet Download
Datasheet: LR8K4
File Size: 616306 KB
Manufacturer: SUTEX [Supertex, Inc]
Download : Click here to Download
LR8K4 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 VOUT 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 10A is connected to the ADJ pin. This increases VOUT by a constant voltage of 10A 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 VOUT of the LR8. To maintain stability, a bypass capacitor of 1.0F or larger and a minimum DC output current of 500A are required.
The device is available in TO-92, TO-243AA (SOT-89), and TO-252 (D-PAK) packages.
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 VOUT of the LR8. To maintain stability, a bypass capacitor of 1.0F or larger and a minimum DC output current of 500A are required.
The device is available in TO-92, TO-243AA (SOT-89), and TO-252 (D-PAK) packages.
LR8K4 Maximum Ratings
VIN Input Voltage -0.5V to +480V*
Output Voltage Range -0.5V to +470V
Operating Ambient Temperature Range -40 to +85
Operating Junction Temperature Range -40 to +125
Storage Temperature Range -65 to +150
*Voltages referenced to ADJ.
Output Voltage Range -0.5V to +470V
Operating Ambient Temperature Range -40 to +85
Operating Junction Temperature Range -40 to +125
Storage Temperature Range -65 to +150
*Voltages referenced to ADJ.
LR8K4 Features
` 12V to 450V input voltage range
` Adjustable 1.20V to 440V output regulation
` 5% output voltage tolerance
` Output current limiting
` 10A typical ADJ current
` Internal junction temperature limiting
` Adjustable 1.20V to 440V output regulation
` 5% output voltage tolerance
` Output current limiting
` 10A typical ADJ current
` Internal junction temperature limiting
LR8K4 Typical Application
· Off-line SMPS startup circuits
· Adjustable high voltage constant current source
· Industrial Controls
· Motor controls
· Battery chargers
· Power supplies
· Adjustable high voltage constant current source
· Industrial Controls
· Motor controls
· Battery chargers
· Power supplies
MT58L64L18CT-10
Price: 4-6 USD
MT58L64L18CT-10 TQFP100
DL-7140-211M
Price: 5-6.5 USD
DL-7140-211M laser tube
74LVC74APG
Price: 4-5 USD
74LVC74APG - IC FLIP FLOP D-Type POS-EDG DUAL 14TSSOP
CY28346ZI-2
Price: 6.5-8 USD
CYPRESS - Clock Synthesizer with Differential CPU Outputs
PI5V330QEX
Price: 0.284-0.286 USD
PI5V330QEX Pericom Multiplexer Switch ICs
BSM300GA120DN2
Price: 1-2 USD
IGBT power module, Single switch, 1200 V, Collector-emitter voltage, 430A
SVA150XG04TB
Price: 1-2 USD
a-Si TFT-LCD, NEC, 228.096Hmm, 560V
PC354N1
Price: 0.124-0.2 USD
PC354N1T - Mini-flat Package, AC Input Type Photocoupler - Sharp Electrionic Components
RL1210JR-070R22L
Price: 0.177-0.178 USD
RL1210JR51-XX-BL - Thick Film Chip Resistor Low Ohmic - TAITRON Components Incorporated
STPS140A
Price: 0.053-0.055 USD
STPS140A - POWER SCHOTTKY RECTIFIER - STMicroelectronics
STA013
Price: 1.45-1.5 USD
STA013 - MPEG 2.5 LAYER III AUDIO DECODER - STMicroelectronics
SMBJ5347B
Price: 0.073-0.075 USD
SMBJ5347B - 5 Watt Surface Mount Silicon Zener Diodes - Micro Commercial Components
