STEVAL-CBL006V1

STEVAL-CBL006V1 Demonstation board: power supply for LNB based on the LNBH24 (QFN32) Data Brief Features ■ Complete interface between LNBs and I²C bus ■ Built-in DC-DC converter for single 12 V supply (8 V to 15 V Vin range) operation and high efficiency (typ. 93%@0.5 A) ■ Compliant with main satellite receivers output voltage specification ■ Accurate built-in 22 kHz tone generator meets widely accepted standards (patent pending) ■ Fast oscillator start-up facilitates DiSEqC™ encoding ■ Built-in 22 kHz tone detector supports bidirectional DiSEqC™ 2.0 ■ Over-load and over-temperature internal protections with I²C diagnostic bits ■ Output voltage and output current level diagnostic feedback by I²C bits ■ LNB short circuit dynamic protection ■ +/- 4 kV ESD tolerant on output power pins ■ Based on LNBH24 in QFN32 package STEVAL-CBL006V1 Description The demonstration board STEVAL-CBL006V1 implements a DC-DC converter based on the device LNBH24. It gives good performance in a simple and cheap way and minimum external components are required. It includes all the functions that allow the design of a dual tuner STBs with supplying/interfacing function in accordance with the international standards. It also includes an I²C bus interface and, thanks to a fully integrated step-up DC-DC converter, it works with a single input voltage supply in the range of 8 V to 15 V. February 2009 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 2/4 STPS130A D1b 22µH L1b Vin +12V C4b 470nF C1 100µF C3b 100µF Bead Ferrite L2b I2C C2 100nF C7 100nF 11KOhm Rsel-A Ferrite Bead L2a C5b 100µF C6b 470nF C8 220nF R1 100 Ohm 11KOhm Rsel-B C6a C5a 100µF 470nF ISEL-B ISEL-A LX-A Vup-A Vup-B SDA SCL LX-B Vcc-L Vcc 20 9 10 1-30 36 35 27 16 17 VoTX-B VoRX-B DETIN-B DSQIN-B 32 31 3 18 4 DSQOUT-B 5 TTX-B 2 TTX-A DSQOUT-A15 DSQIN-A DETIN-A 470nF D3b 1N4007 14 6 ADDR-A ADDR- B C11 BYP 25 VoRX-A 26 VoTX-A EXTM-B VCTRL-B L N B H 2 4 P-GND-B P- GND- A A-GND 33 13 12 8 28 29 34 21 11 22 19 EXTM-A VCTRL-A C10b 220nF C10a 220nF 15 ohm R4b 220µH L3b 10nF C12b C12a 10nF 15 Ohm R4a D4b 1N5818 C9b 10µF D2b BAT43 R3b 10K R3a 10K D2a BAT43 L3a 220µH 1N5818 D4a C9a 10µF C13b 10nF C13a 10nF DxB DxA TVS B LNBOUT_B TVS A LNBOUT_A Figure 1. 22µH C3a 100µF 1 L1a D1a STPS130A C4a 470nF D3a 1N4007 Circuit schematic STEVAL-CBL006V1 Circuit schematic Schematic diagram AM03218v1 STEVAL-CBL006V1 2 Revision history Revision history Table 1. Document revision history Date Revision 19-Feb-2009 1 Changes Initial release. 3/4 STEVAL-CBL006V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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