LNBH26L is a monolithic voltage regulator and interface IC 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 offers a complete solution for dual tuner satellite receivers with an extremely low component count and low power dissipation together with simple design and I²C standard interfacing.
The LNBH26L 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 mm) package and provides a complete solution for dual tuner satellite receivers with low component count and low power dissipation. The device offers a complete interface between the LNB and I2C bus, including a built-in DC-DC converter for single 12 V supply operation with high efficiency (typ. 93% @ 0.5 A).
| Package | QFN24 (4x4 mm) |
|---|---|
| Efficiency | typ. 93% @ 0.5 A |
| Output voltage levels | 8 programmable levels |
| Undervoltage lockout threshold | 4.7 V typ. |
| Soft-start time (13 V) | 4 ms typ. |
| Soft-start time (18 V) | 6 ms typ. |
| Total current recommendation | 1 A from both sections |
The undervoltage lockout (UVLO) threshold is 4.7 V typically.
The device supports 8 programmable levels compliant with satellite receiver output voltage specifications.
The built-in DC-DC converter offers high efficiency of typically 93% at 0.5 A.