LNBH26 STMicroelectronics, LNBH26 Datasheet - Page 17

• Manufacturer Part Number: LNBH26
• Description: Dual LNB supply and control IC with step-up and I2C interface
• Manufacturer: STMicroelectronics

LNBH26
Figure 7.
Table 6.
Vin
12V
Component
R1 (RSEL)
C1, C2
C4, C7
TR1
C3
C5
C6
D1
D3
D2
L1
L2
C1
D1-A
D1-B
L1-A
L1-B
DiSEqC 2.x application circuit
DiSEqC 2.x bill of material (valid for A and B channels except for C1, C4,
C7 and R1)
SMD resistors. Refer to
> 25 V electrolytic capacitor, 100 µF is suitable
From 470 nF to 2.2 µF ceramic capacitor. Higher values allow lower DC-DC noise.
From 100 nF to 220 nF ceramic capacitor. Higher values allow lower DC-DC noise.
220 nF ceramic capacitors
10 nF ceramic capacitors
STPS130A or similar schottky diode
BAT54, BAT43, 1N5818, or any low power schottky diode with I
V
1N4001-07, S1A-S1M, or any similar general purpose rectifier
10 µH inductor with I
220 µH inductor
2STR2160 or 2STF2340 or any small power PNP with IC > 250 mA, V
be used.
Also any small power PMOS with ID > 250 mA, R
used.
RRM
C2-B
> 25 V, V
C2-A
R1 (RSEL)
I
C4
2
C Bus
C3-B
C7
C3-A
F
{
< 0 .5 V . To be placed as close as possible to V
16
17
Doc ID 022771 Rev 1
21
10
3
8
9
7
5
V
V
LX-A
LX-B
ISEL
SDA
SCL
Vcc
Byp
sat
UP-A
UP-B
> I
Table 13
P-GND
peak
4
LNBH26
where I
D2-A
D2-B
A-GND
and ISEL pin description in
15
DSQOUT-A
DSQOUT-B
peak
DSQIN-A
DSQIN-B
DETIN-A
BPSW-B
BPSW-A
DETIN-B
Notes
V
V
ADDR
OUT-B
OUT-A
FLT
FLT
is the boost converter peak current
19
13
18
23
22
12
11
20
24
2
1
6
C5-B
C5-A
4.7k
4.7k
DSON
Open drains
to µController
D3-A
D3-B
4.7k
4.7k
Typical application circuits
10k
< 0.5Ω, V
10k
Tone enable control
L2-A
15 Ω
15 Ω
L2-B
Table 2
TR1-B
TR1-A
F
DS
(AV) > 0.2 A,
OUT
C6-B
C6-A
> 20 V, can be
pin
LNBOUT-B
LNBOUT-A
CE
DiSEqC
Envelope
DiSEqC
22KHz
> 30 V, can
or
AM10478v1
17/38
TTL
TTL