STEVAL-CBL007V1 LNB power supply demonstration board based on the DiSEqC 1.X-compliant LNBH23L Data brief Features 2 Complete interface between LNB and I C bus Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% 0.5 A) Selectable output current limitation via external resistor Compliant with main satellite receiver output voltage specifications Auxiliary modulation input (EXTM pin) TM facilitates DiSEqC 1.X encoding Accurate built-in 22 kHz tone generator suits STEVAL-CBL007V1 widely-accepted standards Low-drop post regulator and high efficiency step-up PWM with integrated power NMOS to reduce power losses Internal overload and over-temperature 2 protection with I C diagnostic bits Dynamic LNB short-circuit protection RoHS compliant Description The STEVAL-CBL007V1 demonstration board is intended to provide information and suggestions on the correct use of the LNBH23L device. The LNBH23L is an integrated solution for supplying/interfacing satellite LNB modules. Simple and inexpensive, it provides good performance while minimizing the number of external components required. It includes all functions needed for LNB supply and interfacing, and is compliant with international 2 standards. It includes an I C bus interface and, due to the fully integrated step-up DC-DC converter, functions with a single input voltage supply from 8 V to 15 V. August 2010 Doc ID 17669 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Obsolete Product(s) - Obsolete Product(s) . 0 . Y CASE IN ONL USED E O B 6 6 6I ,8 6U Schematic diagram STEVAL-CBL007V1 1 Schematic diagram Figure 1. Circuit schematic /HM 2 2 /HM 42 LOADEVITICAPACV Y A M MAX OF HE 4Y N& . 4 2 23%, K/HM 2 N& N& + /HM N& N& 2 /HM + P 0 6O48 6 O28 31) ,( , C 8 6CC , 6C 3 3 , 2 2 44 P N&US ) N& & N& N& , , ( & - V N 2/4 Doc ID 17669 Rev 1 Obsolete Product(s) - Obsolete Product(s) TO , %84- 3403 )3%,