STEVAL-CBL009V1 STMicroelectronics

STEVAL-CBL009V1 DiSEqC 1.X-compliant single LNB supply and control IC based on the LNBH25 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 22 kHz tone waveform integrity guaranteed also in no load condition Low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS for low power loss LPM (low power mode) function to reduce dissipation Overload and overtemperature internal 2 protection with I C diagnostic bits LNB short-circuit dynamic protection DiSEqC 1.x communication RoHS compliant Description The STEVAL-CBL009V1 demonstration board implements a DC-DC converter based on STs LNBH25 device. It is used to power LNBs in dish antennas to receive satellite TV signals. It provides good performance at low cost using a low external component count, and includes all functions needed for supplying/interfacing LNB modules in accordance with international standards. 2 The device includes an I C bus interface and, thanks to a fully integrated step-up DC-DC converter, it works with a single input voltage supply ranging from 8 V to 16 V. February 2013 Doc ID 024060 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Schematic diagram STEVAL-CBL009V1 1 Schematic diagram Figure 1. STEVAL-CBL009V1 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 1 3 * 2/4 Doc ID 024060 Rev 1 & *1 % 5 5 & 4, 6 & & 9L ( %3 / & & & 9R 9X 1% WR