lnbh25pqr STMicroelectronics, lnbh25pqr Datasheet - Page 15

• Manufacturer Part Number: lnbh25pqr
• Description: Lnb Supply And Control Ic With Step-up And I²c Interface
• Manufacturer: STMicroelectronics

LNBH25
Figure 7.
Table 6.
Component
R1 (RSEL)
DiSEqC
Envelope
DiSEqC
22KHz
C1, C2
C4, C7
D1, D3
TR1
Vin
12V
C3
C5
C6
D2
L1
L2
or
TTL
DiSEqC 2.x application circuit
DiSEqC 2.x bill of material
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.
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.
D1
L1
C1
TTL
R1 (RSEL)
C2
C4
I
2
C Bus
C3
Doc ID 022433 Rev 3
{
sat
22
21
17
8
9
3
6
7
> I
Table 13
Vup
ISEL
LX
DSQIN
SDA
Vcc
SCL
ADDR
peak
where I
P -GND
and ISEL pin description in
LNBH25
4
D2
peak
A -GND
Notes
15
is the boost converter peak current.
DSQOUT
BPSW
DETIN
Vout
FLT
Byp
DSON
23
20
18
19
16
2
Typical application circuits
< 0.5Ω, V
C5
Open drains
to µController
4.7k
D3
C7
4.7k
Table 2
10k
DS
15 Ω
L2
> 20 V, can be
TR1
C6
CE
> 30 V can
to LNB
AM10432v1
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