steval - cbl014v1 dual lnb supply and control ic diseqc 1.x compliant based on the lnbh26l 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 (8 programmable levels) ? accur ate 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 ? overload and overt emperature internal protection with i2c diagnostic bits ? lnb short - circuit dynamic protection ? rohs compliant description this product evaluation board implement s a dc - dc converter based on the lnbh26l device used to power lnb inside dish antennas which receive satellite tv signals. the lnbh26l is an integrated solution for supplying/interfacing satellite lnb modules in accordance with international standards, off ering a complete solution for dual - tuner satellite receivers and good performance at low cost using few external components. the lnbh26l evaluation board includes an i 2 c bus interface and the internal 22 khz tone generator (factory trimmed) is controlled b y 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 docid025828 rev 1 1 / 4 for further information contact your local stmicroelectronics sales office www.st.com
schematic steval - cbl014v1 1 schematic figure 1 : steval - cbl014v1 schematic 2 / 4 docid025828 rev 1
steval - cbl014v1 revision history 2 revision history table 1: revision history date revision changes 27- jan - 2014 1 initial release docid0 25828 rev 1 3 / 4
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