STEVAL-CBL011V1 STMicroelectronics

STEVAL-CBL011V1 DiSEqC 1.X-compliant dual LNB supply and control IC based on the LNBH26 Data brief Features 2 Complete interface between LNB and I C bus Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% 0.5 A) Selectable output current limit by external resistor Compliant with main satellite receiver output voltage specification (15 programmable levels) Accurate built-in 22 kHz tone generator compliant with widely accepted standards 22 kHz tone waveform integrity guaranteed The LNBH26 demonstration board includes an also in no load condition 2 I C bus interface and a factory-trimmed internal Low drop post regulator and high efficiency 22 kHz tone generator which can be controlled step-up PWM with integrated power N-MOS for through the DSQIN pin (TTL compatible). This low power loss allows immediate DiSEqC data encoding. LPM (low power mode) function to reduce Thanks to a fully integrated step-up DC-DC dissipation converter, the STEVAL-CBL011V1 demonstration Overload and overtemperature internal board can operate with a single input voltage 2 protection with I C diagnostic bits supply source, ranging from 8 to 15 V. LNB short-circuit dynamic protection RoHS compliant Description The STEVAL-CBL011V1 demonstration board implements a DC-DC converter based on STs LNBH26 device. It is used to power LNBs in dish antennas to receive satellite TV signals. The LNBH26 is an integrated solution for supplying/interfacing satellite LNB modules in accordance with international standards. This single device offers a complete solution for dual-tuner satellite receivers and provides good performance at low cost using a low external component count. February 2013 Doc ID 024061 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Schematic diagram STEVAL-CBL011V1 1 Schematic diagram Figure 1. STEVAL-CBL011V1 circuit schematic % / S X W & & % & % & % & % % & / /1%+ / 6 : % / , 1 7 Q 9FF 9 4)1 / L 6(T & .+ / 77 1 RU L 6(T & 5 7 6428 (Q O RS YH H / 77 6 , %XV / /6& )/7 9 ( / ,6( / S 13 * 2/4 Doc ID 024061 Rev 1 & *1 % 5 56 & 4, 6 & & 9L ( %3 9R 9X 1% WR