steval - cbl016v1 single lnb supply and control ic diseqc 1.x compliant with extm based on the lnbh29 in a qfn16 (4x4) 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 (6 programmable levels) ? accurate built - i n 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 loss ? overload and overtemperature inte rnal protection with i2c diagnostic bits ? lnb short - circuit dynamic protection ? rohs compliant description this product evaluation board implements a dc - dc conver ter based on the lnbh29 device used to power lnb inside dish antennas which receive satellite tv signals. the lnbh29 is an integrated solution for supplying/interfacing satellite lnb modules in accordance with international standards, offering a complete s olution for single - tuner satellite receivers and good performance at low cost using few external components. the lnbh29 evaluation board includes an i 2 c bus interface and is provided with the extm analog modulation input pin to be connected to an external 22 khz diseqc tone source. the tone output waveform depends on the characteristics of the external signal provided by the extm pin. a fully integrated step - up dc - dc converter allows operation with a single input voltage supply source ranging from 8 v to 17 .5 v. january 2014 docid025825 rev 1 1 / 4 for further information contact your local stmicroelectronics sales office www.st.com
schematic steval - cbl016v1 1 schematic figure 1 : steval - cbl016v1 schematic 2 / 4 docid025825 rev 1
steval - cbl016v1 revision history 2 revision his tory table 1: revision history date revision changes 27- jan - 2014 1 initial release docid025825 rev 1 3 / 4
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