- RS stock no.:
- 829-3449
- Mfr. Part No.:
- LR745N3-G
- Manufacturer:
- Microchip
2000 Available from UK/Europe in 4–6 working days for collection or delivery to major cities (Heavy, hazardous or lithium product excluded. Delivery T&C's apply)
Price (Excl VAT) Each (In a Pack of 20)
R 8.52
(exc. VAT)
R 9.80
(inc. VAT)
units | Per unit | Per Pack* |
20 - 40 | R 8.52 | R 170.40 |
60 - 80 | R 8.307 | R 166.14 |
100 + | R 8.058 | R 161.16 |
*price indicative |
- RS stock no.:
- 829-3449
- Mfr. Part No.:
- LR745N3-G
- Manufacturer:
- Microchip
Technical data sheets
Legislation and Compliance
Product Details
LR745, High Input Voltage SMPS Start-up, Microchip
The Microchip LR745 high input voltage SMPS start-up circuit is ideally suited for use with industry standard low voltage PWM ICs having start thresholds of 13.9 to 18.0V. It operates on 35V to 450V voltage range. This circuit allows the PWM ICs to be operated from rectified 120 or 240VAC lines, and eliminates the use of power resistors often used for this purpose. The internal circuitry of the LR745 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 start-up period. After start-up, the internal high voltage line is disconnected from the IC, thereby reducing the continuous power dissipation to a minimum.
Output current limiting
Very low power consumption after start-up
Lead(Pb) free
TO-92 (fixed voltage) package
Very low power consumption after start-up
Lead(Pb) free
TO-92 (fixed voltage) package
PWM (Pulse Width Modulation) Controllers, Microchip
Specification
Attribute | Value |
---|---|
Power Switch Type | SMPS Start Up |
Maximum Operating Supply Voltage | 40 V |
Number of Outputs | 1 |
Maximum Operating Current | 4mA |
Mounting Type | Through Hole |
Package Type | TO-92 |
Pin Count | 3 |
Maximum Operating Temperature | +150 °C |
Minimum Operating Temperature | -55 °C |
Dimensions | 0.205 x 0.165 x 0.21in |