LR6PH, LR6X, LR745 Selling Leads, Datasheet
MFG:FUJITSU Package Cooled:TO-92 D/C:08+
LR6PH, LR6X, LR745 Datasheet download
Part Number: LR6PH
MFG: FUJITSU
Package Cooled: TO-92
D/C: 08+
LR6PH, LR6X, LR745
- Table of contents:
Info of LR6PH
Info of LR6X
Info of LR745
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About LR600
PDF/DataSheet Download
Datasheet: LR600
File Size: 194072 KB
Manufacturer: LITTELFUSE [Littelfuse]
Download : Click here to Download
About LR600
PDF/DataSheet Download
Datasheet: LR600
File Size: 194072 KB
Manufacturer: LITTELFUSE [Littelfuse]
Download : Click here to Download
About LR745
PDF/DataSheet Download
Datasheet: LR745
File Size: 335529 KB
Manufacturer: SUTEX [Supertex, Inc]
Download : Click here to Download
LR745 General Description
The Supertex LR7 is a high input voltage SMPS start-up circuit.
The LR7 is ideally suited for use with industry standard low voltage PWM ICs having start thresholds of 13.9V to 18.8V. It allows the PWM ICs to be operated from rectified 120V or 240VAC lines, and eliminates the use of power resistors often used for this purpose. The internal circuitry of the LR7 allows the PWM ICs to operate at a VCC voltage below their start threshold voltage after start-up. The auxiliary voltage can be less than the start threshold voltage, which allows for improved efficiency.
Current from the high voltage line is drawn only during the startup period. After start-up, the internal high voltage line is disconnected from the IC thereby reducing the continuous power dissipation to a minimum.
The LR7 is ideally suited for use with industry standard low voltage PWM ICs having start thresholds of 13.9V to 18.8V. It allows the PWM ICs to be operated from rectified 120V or 240VAC lines, and eliminates the use of power resistors often used for this purpose. The internal circuitry of the LR7 allows the PWM ICs to operate at a VCC voltage below their start threshold voltage after start-up. The auxiliary voltage can be less than the start threshold voltage, which allows for improved efficiency.
Current from the high voltage line is drawn only during the startup period. After start-up, the internal high voltage line is disconnected from the IC thereby reducing the continuous power dissipation to a minimum.
LR745 Maximum Ratings
Input Voltage 450V
Output Voltage 25V
Operating and Storage Temperature 55 to 150
Soldering Temperature* 300
*Distance of 1.6mm from case for 10 seconds
Output Voltage 25V
Operating and Storage Temperature 55 to 150
Soldering Temperature* 300
*Distance of 1.6mm from case for 10 seconds
LR745 Features
· 25V to 450V operating input voltage range
· Compatible with industry standard PWM ICs. See application notes AN-H28 and AN-H29.
· Output current limiting
· For PWM ICs with start-up threshold voltage of 13.9V to 18.8V
· Very low power consumption after start-up
· Compatible with industry standard PWM ICs. See application notes AN-H28 and AN-H29.
· Output current limiting
· For PWM ICs with start-up threshold voltage of 13.9V to 18.8V
· Very low power consumption after start-up
LR745 Typical Application
· Notebook and Laptop computers
· Telecommunication power supplies
· Battery chargers
· Motor controller
· Telecommunication power supplies
· Battery chargers
· Motor controller
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