The LNBH26S is a monolithic voltage regulator and interface IC from STMicroelectronics, specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna dishes or to the multi-switch box. It features high efficiency, low power consumption and good anti-interference capability.
The LNBH26S is a monolithic voltage regulator and interface IC designed for analog and digital dual satellite receivers, Sat-TV, and Sat-PC cards. It is assembled in a QFN24 (4x4) package and is specifically designed to provide 13 V / 18 V power supply and 22 kHz tone signalling to the LNB down-converter in antenna dishes or to the multi-switch box.
| Package | QFN24 (4x4) |
|---|---|
| Input voltage range | 8 V to 16 V |
| Output voltages | 13 V / 18 V |
| Efficiency | typ. 93% @ 0.5 A |
| Order code | LNBH26SPQR |
The IC has an undervoltage lockout circuit that disables the circuit when the supplied voltage drops below 4.7 V typically.
The linear regulator current limit threshold is set by an external resistor connected to the ISEL pin.
The soft-start time is internally fixed at 4 ms typically to switch from 0 to 13 V.