ST CBL006V1 User Manual

Demonstation board: power supply for LNB

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

based on the LNBH24 (QFN32)

Data Brief

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 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Circuit schematic STEVAL-CBL006V1

1 Circuit schematic

Figure 1. Schematic diagram

LNBOUT_B

DxB

L3b

220µH

31

VoRX-B

SCL

13

TVS B

C13b 10nF

R4b

15 ohm

C10b

220nF

SDA

12

C9b 10µF

D2b

D4b

BAT43

1N5818

B-R

32

6

D
D
A

VoTX-B

14

ADDR-A

27

BYP

A-GND

1-30

A-

DN

G-P

10

9

Vup-B

33

P-GND-B

D3b

1N4007

C11

470nF

TVS A

LNBOUT_A

DxA

C13a 10nF

10nF

10nF

L3a

C9a 10µF

25

VoTX-A

35

1N4007

D3a

VCTRL-B

36

EXTM-B

220µH

D4a

1N5818

26

VoRX-A

C12a

15 Ohm

R4a

BAT43

D2a

R3a 10K

C10a

220nF

17

DETIN-A

DSQIN-A

DSQOUT-A

L

N

BH2

C12b

R3b 10K

3

2

5

4

181516

TTX-B

TTX-A

DSQIN-B

DETIN-B

DSQOUT-B

4

20

VCTRL-A

19

EXTM-A

ISEL-A

ISEL-B

Vup-A

22

LX-A

34

21

11

Vcc-L

Vcc

29

28

LX-B

8

C6a

470nF

Rsel-B

100µF

C5a

Bead

L2a

Ferrite

100µF

C3a

470nF

C4a

STPS130A

D1a

11KOhm

Rsel-A

11KOhm

22µH

L1a

Vin

+12V

2/4

C6b

470nF100µF

R1

100 Ohm

C8

220nF

C7

100nF

100nF

C1 C2

100µF

22µH

L1b

D1b

I2C

STPS130A

C5b

L2b

Bead

Ferrite

C3b

100µF

C4b

470nF

AM03218v1