STMicroelectronics LNBK20D2
the LNBK20D2 is a monolithic linear voltage (min) and 23V (min), and an internal switch regulator, assembled in SO-20, specifically automatically will select the suitable supply pin designed to provide the powering voltages and the according to the selected output voltage. It has losses are acceptable, both supply pins can be the same functionality of the LNBP1X and powered by the same 23V source without LNBP20 series, at a reduced output current affecting any other circuit performance. This internal pins (LNBA, LNBB).
| Part No. |
LNBK20D2 |
| Datasheet |
LNBK20D2
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| Manufacturer |
 STMicroelectronics |
| Description |
LNB SUPPLY AND CONTROL VOLTAGE REGULATOR |
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DESCRIPTION
the regulator has two Supply Input pins VCC1 and Intended for analog and digital satellite receivers, VCC2. They must be powered respectively at 16V If interfacing signals to the LNB downconverter adequate heatsink is provided and higher power situated in the antenna via the coaxial cable. capability. Since most satellite receivers have two The ENT (Tone Enable) pin activates the internal antenna ports, the output voltage of the regulator oscillator so that the DC output is modulated by a is available at one of two logic-selectable output ±0.3 V, 22KHz (typ.) square wave. This internal pins (LNBA, LNBB). When the IC is powered and oscillator is factory trimmed within a tolerance of put in Stand-by (EN pin LOW), both regulator ±2KHz, thus no further adjustments neither outputs are disabled to allow the antenna external components are required. downconverters to be supplied/controlled by A burst coding of the 22KHz tone can be others satellite receivers sharing the same coaxial accomplished thanks to the fast response of the lines.
