LNBP21 is a monolithic voltage regulator and interface IC intended for analog and digital satellite STB receivers/SatTV, sets/PC cards. It is assembled in SO-20 and PowerSO-20 and is specifically designed to provide the power and the 13/18V, 22KHz tone signalling to the LNB down converter in the antenna or to the multiswitch box. In this application field, it offers a complete solution with extremely low component count, low power dissipation and simple design together with I2CTM standard interfacing. The IC has a built in DC/DC step-up controller that, from a single 12V supply, provides 2.5V and 13.5V voltages to meet the LNB power requirements. It also features an accurate built-in 22KHz tone oscillator for transmitting 22KHz tone signal to the LNB.
The LNBP21 is a monolithic voltage regulator and interface IC designed for analog and digital satellite STB receivers and multiswitch boxes. It provides power and 13/18V tone signaling to LNB down converters, featuring a built-in DC/DC step-up controller for single 12V supply operation and an accurate 22kHz tone oscillator.
The device offers a complete interface between the LNB and I2C bus, including built-in 22kHz tone detection for bi-directional DiSEqC support. It includes protection features such as short circuit protection, diagnostic capabilities, cable length digital compensation, and internal over-temperature protection.
| Step-up Voltage Input | 25V |
|---|---|
| Logic Input Voltage | -0.3V to 7V |
| Operating Junction Temperature | -40 to +125 C |
| ESD Rating | 4KV |
Yes, it features a built-in 22kHz tone detector that supports bi-directional DiSEqC interfacing.
The lower threshold is between 400 and 550mA, while the higher threshold is between 500 and 650mA.