This device has been transferred from Ampleon to Flip Electronics.
UHF power LDMOS transistor
A 650W LDMOS RF power transistor for DVB-T broadcast applications optimised to give extremely high power and efficiency in Doherty solutions.
Whitepaper Doherty Architectures in UHF
This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry.
In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.
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Features and benefits
- Optimised for Doherty solutions in split-band (70MHz to 100MHz)
- Extremely high power (P1dB 650W)
- Extremely high Doherty efficiency (>50%)
- Internal input matching for high gain
- Optimum thermal behavior and reliability, Rth(j-c) = 0.15 K/W
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 | 650 | W | |||
| Test signal: DVB-T (8k OFDM) | ||||||
| Gp | power gain | VDS = 50 V; f = 858 MHz | 20 | 21 | dB | |
| ηD | drain efficiency | VDS = 50 V; f = 858 MHz; IDq = 1.3 A | 30 | 33 | % | |
| PL(AV) | average output power | VDS = 50 V; f = 858 MHz | 120 | W | ||
| IMDshldr | intermodulation distortion shoulder attenuation | f = 858 MHz [0] | -31 | -27 | dBc | |
| PAR | peak-to-average ratio | f = 858 MHz [1] | 8.2 | dB | ||
Package / Packing
| Type number | Package | Outline version | Reflow-/Wave soldering |
Packing | Product status | Marking |
Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|---|
| BLF888BS | SOT539B (SOT539B) |
sot539b_po | Bulk Pack | Transferred | Standard Marking |
BLF888BS,112 (9340 651 22112) |
Pinning info
| Pin | Symbol | Description | Simplified outline | Graphic symbol |
|---|---|---|---|---|
| 1 | D1 | drain1 |
|
|
| 2 | D2 | drain2 | ||
| 3 | G1 | gate1 | ||
| 4 | G2 | gate2 | ||
| 5 | S | source |
Ordering & availability
| Type number | Ordering code (12NC) | Orderable part number | Distributor | Buy online | Samples |
|---|---|---|---|---|---|
| BLF888BS | 9340 651 22112 | BLF888BS,112 | Flip Electronics | Buy | Not available |
Ordering & availability
| Type number | Ordering code (12NC) | Orderable part number | Distributor | Buy online | Samples |
|---|---|---|---|---|---|
| BLF888BS | 9340 651 22112 | BLF888BS,112 | Flip Electronics | Buy | Not available |
Documentation
| Title | Type | Date | |
|---|---|---|---|
| UHF power LDMOS transistor | Data sheet | 2015-12-07 | |
| Ampleon’s Ultra Wideband Doherty (UWD) for TV transmitters | White paper | 2016-09-09 | |
| Mounting and soldering of RF transistors in air cavity packages | Application note | 2024-05-23 | |
| RF power solutions for ISM, broadcast, navigation and safety radio applications | Brochure | 2024-10-25 | |
| 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) BLF888B(S) (Data sheet) | Design support | 2012-02-24 | |
| BLF888B Model for ADS (Keysight Advanced Design System) | Simulation model | 2017-01-04 |