for further information contact your local stmicroelectronics sales office. february 2013 doc id 024061 rev 1 1/4 4 STEVAL-CBL011V1 diseqc 1.x-compliant dual lnb su pply and control ic based on the lnbh26 data brief features complete interface between lnb and i 2 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 sate llite 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 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 protection with i 2 c diagnostic bits lnb short-circuit dynamic protection rohs compliant description the STEVAL-CBL011V1 demonstration board implements a dc-dc converter based on st?s 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 sa tellite lnb modules in accordance with international standards. this single device offers a complete solution for dual-tuner satellite receiv ers and provides good performance at low cost using a low external component count. the lnbh26 demonstration board includes an i 2 c bus interface and a factory-trimmed internal 22 khz tone generator which can be controlled through the dsqin pin (t tl compatible). this allows immediate diseqc? data encoding. thanks to a fully integrated step-up dc-dc converter, the STEVAL-CBL011V1 demonstration board can operate with a single input voltage supply source, ranging from 8 to 15 v. www.st.com
schematic diagram STEVAL-CBL011V1 2/4 doc id 024061 rev 1 1 schematic diagram figure 1. STEVAL-CBL011V1 circuit schematic / $ / % 9 9 l q w r / 1 % / ; 9 x s 9 r x w $ ' ' 5 & / 1 % + % x v ^ , & 6 ' $ 6 & / 3 * 1 ' $ * 1 ' ' $ ' % , 6 ( / % \ s & ' 6 4 , 1 & ' ( 7 , 1 9 f f % 3 6 : ' $ ' % ) / 7 ' 6 4 2 8 7 ' l 6 ( t & ( q y h o r s h 7 7 / r u ' l 6 ( t & . + ] 7 7 / ' $ ' % 4 ) 1 [ / & $ & % & $ & % 5 6 ( / & $ & % ' / 5 9
STEVAL-CBL011V1 revision history doc id 024061 rev 1 3/4 2 revision history table 1. document revision history date revision changes 11-feb-2013 1 initial release.
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