data brief for further information contact your local stmicroelectronics sales office. september 2008 rev 1 1/4 4 STEVAL-CBL003V1 lnb power supply demonstratio n board based on the lnbh23 features integrated dc-dc converter single input supply voltage: from 8 v to 15 v i 2 c bus interface for the ic control and diagnostics integrated 22 khz tone generator, factory trimmed in accordance with the standards that can be controlled by the dsqin pin or i 2 c bus user-friendly graphical interface ("lnbxxx control suite" software included in the kit) description this demonstration board implements a dc-dc converter based on the lnbh23 device. it is used to power lnbs inside dish antennas to receive satellite tv signals. the lnbh23 is an integrated solution for supplying/interfacing sa tellite lnb modules in accordance with international standards this simple solution provides good performance at low cost using a low external component count. the lnbh23 demonstration board includes an i 2 c? bus interface and the internal 22 khz tone generator which is factory trimmed and can be controlled by the dsqin pin (ttl compatible. this allows immediate diseqc? data encoding. thanks to a fully integrated step-up dc-dc converter, it functions with a single input voltage supply source ranging from 8 v to 15 v. STEVAL-CBL003V1 www.st.com
block diagram STEVAL-CBL003V1 2/4 1 block diagram figure 1. lnbh23 demonstration board schematic , 8 ? & ? ( ? & 6 " e a d & e r r i t e ? & 0 o w e r ! $ $ 2 $ 3 1 ) . 6 # 4 2 , $ 3 1 / 5 4 6 # # ? & 6 $ r i v e r a n d l o g i c 6 # #
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' . $ 6 5 0 ? & # # # # # # $ , , 2 4 0 6 5 0 # ? & ? & # 3 # , " ! 4 " ! 4 $ % 4 ) . 3 $ ! % 8 4 - 4 4 8 # n & ? ( , 2 2 3 % , " 9 0 ! 3 3 2 2 ? & # # ? & # ? & 0
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STEVAL-CBL003V1 revision history 3/4 2 revision history table 1. document revision history date revision changes 17-sep-2008 1 initial release.
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