BLF548
Download datasheetUHF push-pull power MOS transistor
Dual push-pull silicon N-channel enhancement mode vertical D-MOS transistor designed for communications transmitter applications in the UHF frequency range. The transistor is encapsulated in a 4-lead, SOT262A2 balanced flange package, with two ceramic caps. The mounting flange provides the common source connection for the transistors.
Features and benefits
- High power gain
- Easy power control
- Gold metallization ensures excellent reliability
- Good thermal stability
- Designed for broadband operation
Applications
- Communications transmitters in the UHF range
Parametrics
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| frange | frequency range | 100 | 500 | MHz | ||
| PL(1dB) | nominal output power at 1 dB gain compression | 150 | W | |||
| Test signal: CW | ||||||
| Gp | power gain | PL = 150 W; VDS = 28 V | 10 | 11 | dB | |
| ηD | drain efficiency | VDS = 28 V; f = 500 MHz; IDq = 160 mA | 50 | 55 | % | |
| PL | output power | 150 | W | |||
Package / Packing
All type numbers in the table below are discontinued.
| Type number |
Package type, (Package outline) |
Outline version | Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|
| BLF548 | SOT262 (SOT262A2) |
sot262a2_po | Bulk Pack | Withdrawn | Standard Marking |
BLF548,112 (9340 066 20112) |
| Trade pack | Withdrawn | Standard Marking |
BLF548,114 (9340 066 20114) |
Discontinuation information
Pinning info
| Pin | Symbol | Description | Simplified outline | Graphic symbol |
|---|---|---|---|---|
| 1 | D1 | drain1 |
|
|
| 2 | D2 | drain2 | ||
| 3 | G1 | gate1 | ||
| 4 | G2 | gate2 | ||
| 5 | S | source |
Documentation
| Title | Type | Date | |
|---|---|---|---|
| UHF push-pull power MOS transistor | Data sheet | 2015-11-30 | |
| Mounting and soldering of RF transistors in air cavity packages | Application note | 2025-02-03 | |
| RF power solutions for ISM, broadcast, navigation and safety radio applications | Brochure | 2025-06-03 | |
| RF power application reports for ISM, broadcast, navigation and safety radio applications | Brochure | 2025-06-12 | |
| Packages for RF power transistors | Leaflet | 2025-06-20 |
Design support
| Title | Type | Date | |
|---|---|---|---|
| BLF548 14 V 160 mA S-parameter data | S-parameter | 2012-06-08 | |
| BLF548 28 V 160 mA S-parameter data | S-parameter | 2012-06-08 |