LNBH26 STMicroelectronics, LNBH26 Datasheet - Page 16

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

Typical application circuits
5
16/38
Typical application circuits
Figure 6.
Table 5.
Vin
12V
Component
R1 (RSEL)
C1, C2
C4, C7
C3
C5
D1
D3
D2
L1
C1
D1-B
D1-A
L1-A
L1-B
DiSEqC 1.x application circuit
DiSEqC 1.x bill of material (valid for A and B channels except for C1, C4,
C7 and R1)
> 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
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
SMD resistor. Refer to
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
Doc ID 022771 Rev 1
21
16
17
10
3
8
9
7
5
V
LX-A
Vcc
V
ISEL
SDA
SCL
LX-B
Byp
UP-A
UP-B
sat
Table 13
> I
P-GND
peak
4
LNBH26
where I
D2-A
D2-B
A-GND
and ISEL pin description in
15
peak
DSQIN-A
DSQIN-B
Notes
V
V
ADDR
OUT-B
OUT-A
FLT
is the boost converter peak current
20
22
24
11
6
2
C5-A
C5-B
D3-A
D3-B
Tone enable control
Table 2
F
(AV) > 0.2 A,
OUT
LNBOUT-A
LNBOUT-B
pin
DiSEqC
Envelope
DiSEqC
22KHz
LNBH26
or
AM10477v1
TTL
TTL