BLF878
Download datasheetUHF power LDMOS transistor
A 300 W LDMOS RF power transistor for broadcast transmitter applications and industrial applications. The transistor can deliver 300 W broadband over the full UHF band from 470 MHz to 860 MHz. The excellent ruggedness and broadband performance of this device makes it ideal for digital transmitter applications.
Features and benefits
- Excellent ruggedness
- High power gain
- Excellent reliability
- High efficiency
- Good thermal stability
- Easy power control
- Integrated ESD protection
- Internal input and output matching
- Advanced flange material for optimum thermal behavior and reliability
- Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances
Applications
- Communication transmitter applications in the UHF band
- Industrial applications in the UHF band
Parametrics
| Symbol | Parameter | Conditions | Min | Typ/Nom | Max | Unit |
|---|---|---|---|---|---|---|
| frange | frequency range | 470 | 860 | MHz | ||
| PL(1dB) | nominal output power at 1 dB gain compression | 300 | W | |||
| Test signal: CW | ||||||
| Gp | power gain | PL = 300 W; VDS = 42 V; f1 = 860 MHz; f2 = 860.1 MHz | 18 | 21 | dB | |
| ηD | drain efficiency | VDS = 42 V; f = 860 MHz; IDq = 1400 mA | 42 | 46 | % | |
| PL(PEP) | output power | 300 | W | |||
| IMD3 | third-order intermodulation distortion | VDS = 42 V; IDq = 1400 mA | -35 | -31 | dBc | |
Package / Packing
All type numbers in the table below are discontinued.
| Type number | Package | Outline version | Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|
| BLF878 | CDFM2 (SOT979A) |
sot979a_po | Bulk Pack | Withdrawn | Standard Marking |
BLF878,112 (9340 617 88112) |
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 power LDMOS transistor | Data sheet | 2015-12-07 | |
| 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 | 2025-02-12 | |
| RF power application reports for ISM, broadcast, navigation and safety radio applications | Brochure | 2024-10-08 | |
| Packages for RF power transistors | Leaflet | 2024-10-25 |
Design support
| Title | Type | Date | |
|---|---|---|---|
| Printed-Circuit Board (PCB) BLF878 (Data sheet) | Design support | 2012-02-24 | |
| Model Library for Cadence AWR Microwave Office® | Simulation model | 2023-01-02 | |
| Model Library Manual for Cadence AWR Microwave Office® | Simulation model | 2023-01-02 | |
| Simulation Example for Cadence AWR Microwave Office® | Simulation model | 2023-01-02 |