data brief for further information contact your local stmicroelectronics sales office. april 2009 doc id 15562 rev 1 1/4 4 STEVAL-CBL005V1 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 widely accepted standards user-friendly graphical user interface ("lnbxxx control suite") software included in the kit implements the lnbh23 in a qfn32 package description the STEVAL-CBL005V1 lnb power supply demonstration board implements a dc-dc converter based on the lnbh23 device. the lnbh23 is an lnb supply and control ic with step-up and an i 2 c interface. it is used to power an lnb on a dish antenna for reception of satellite tv signals. the lnbh23 is an integrated solution for supplying/interfacing sa tellite lnb modules in accordance with international standards. this solution is simple, inexpensive, shows very good performance and has a low external component count. the lnbh23 demonstration board includes an i 2 c? bus interface and an internal 22 khz tone generator that is factory-trimmed to comply with widely accepted standards, and can be controlled through the dsqin pin (ttl compatible). this allows immediate diseqc? data encoding. due to the fully in tegrated step-up dc-dc converter, it works with a single input voltage supply source ranging from 8 v to 15 v. STEVAL-CBL005V1 www.st.com
circuit schematic STEVAL-CBL005V1 2/4 doc id 15562 rev 1 1 circuit schematic figure 1. schematic diagram lx 100f 22h 100f +12v be a d ferrite 100f power addr d s qin 1 3 /1 8 (vctrl) d s qout vcc 0.1f +12v driver & logic vcc-l 100 0.22f lnbh2 3 vorx votx i s el a-gnd v u p 0.1f c1 c2 c 3 c5 c 8 c7 d2 l1 l2 r1 tp v u p c11 0.22f 0.22f c10 d 3 1n4007 s cl bat4 3 bat4 3 detin s da extm ttx o u tp u t (vorx) c12 10nf 220h l 3 15ohm 11k=0.75a io u t r2 (r s el) by-pa ss r4 r 3 10kohm 10f c9 c4 0.47f c6 0.47f p-gnd d4 d1 s tp s 2l 3 0a tv s
STEVAL-CBL005V1 revision history doc id 15562 rev 1 3/4 2 revision history table 1. document revision history date revision changes 06-apr-2009 1 initial release.
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