Microchip LR745N3-G, SMPS Start Up Power Switch IC 3-Pin, TO-92
- RS Stock No.:
- 829-3449P
- Mfr. Part No.:
- LR745N3-G
- Brand:
- Microchip
Subtotal 20 units (supplied in a bag)*
£8.70
(exc. VAT)
£10.44
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- 1,960 unit(s) ready to ship
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 20 + | £0.435 |
*price indicative
- RS Stock No.:
- 829-3449P
- Mfr. Part No.:
- LR745N3-G
- Brand:
- Microchip
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Microchip | |
| 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 | |
Select all | ||
|---|---|---|
Brand Microchip | ||
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 | ||
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