lnbh25pqr STMicroelectronics, lnbh25pqr Datasheet - Page 14

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

Typical application circuits
5
14/34
Typical application circuits
Figure 6.
Table 5.
Component
R1 (RSEL)
DiSEqC
Envelope
DiSEqC
22KHz
C1, C2
C4, C7
D1, D3
C3
C5
D2
Vin
12V
L1
or
DiSEqC 1.x application circuit
DiSEqC 1.X bill of material
TTL
> 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.
1N4001-07, S1A-S1M, or any similar general purpose rectifier.
10 µH inductor with I
D1
L1
TTL
SMD resistor. Refer to
C1
R1 (RSEL)
C2
C4
I
2
C Bus
C3
Doc ID 022433 Rev 3
{
sat
22
21
17
8
6
9
3
7
Table 13
> I
Vup
ISEL
LX
DSQIN
SDA
Vcc
ADDR
SCL
peak
where I
P-GND
and ISEL pin description in
LNBH25
4
D2
peak
A - GND
Notes
15
is the boost converter peak current.
Vout
FLT
Byp
20
16
2
C5
D3
Table 2
C7
LNBH25
to LNB
AM10431v1