STEVAL-CBL012V1

Dual LNB supply and control IC DiSEqC 2.0 compliant based on

the LNBH26

Data brief

Features

•

Complete interface between LNB and I²C

bus

•

Built-in DC-DC converter for single 12 V

supply operation and high efficiency (typ.

93% @ 0.5 A)

•

Selectable output current limit using an

external resistor

•

Compliant with main satellite receiver output

voltage specifications (15 programmable

levels)

•

Accurate built-in 22 kHz tone generator suits

widely-accepted standards

•

22 kHz tone waveform integrity guaranteed

also at no load

•

Low-drop post regulator and high-efficiency

step-up PWM with integrated power N-MOS

allowing low power losses

•

LPM function (low-power mode) to reduce

dissipation

•

Overload and overtemperature internal

protection with I²C diagnostic bits

•

LNB short-circuit dynamic protection

•

RoHS compliant

Description

This product evaluation board implements a DC-

DC converter based on the LNBH26 device used

to power LNBs inside dish antennas which

receive satellite TV signals. The LNBH26 is an

integrated solution for supplying/interfacing

satellite LNB modules in accordance with

international standards, offering a complete

solution for dual-tuner satellite receivers and

good performance at low cost using few external

components. The LNBH26 evaluation board

includes an I

22 kHz tone generator (factory trimmed) is

controlled by the DSQIN pin (TTL compatible),

permitting immediate DiSEqC™ data encoding. A

fully integrated step-up DC-DC converter allows

operation with a single input voltage supply

source ranging from 8 V to 16 V.

January 2014

DocID025826 Rev 1

1/4

For further information contact your local STMicroelectronics sales

office

www.st.com