LNBH23L STMicroelectronics, LNBH23L Datasheet - Page 12

• Manufacturer Part Number: LNBH23L
• Description: LNB supply and control IC with step-up and I2C interface
• Manufacturer: STMicroelectronics

Typical application circuit
Figure 5.
Table 5.
1. These components can be added to avoid any 22 kHz tone distortion due to heavy capacitive output loads. If not needed
12/25
C4, C6, C8, C10, C11, C15,
they can be removed leaving the PDC pin floating.
R2, R9, R5
R7
Component
Vin
Vin
Vin
Vin
12V
12V
12V
12V
TR1
C14
(1)
C1
C3
D1
D2
D3
L1
, R8
DiSEqC 1.x using external 22 kHz tone generator source through EXTM pin
BOM list
(1)
(1)
(1)
(1)
C1
C1
C1
C1
22KHz signal source
22KHz signal source
22KHz signal source
22KHz signal source
L1
L1
L1
L1
C4
C4
C4
C4
C4
C4
C4
C4
470nF
470nF
470nF
470nF
470nF
470nF
470nF
470nF
D1
D1
D1
D1
D1
D1
D1
D1
1/16 W resistors. Refer to the typical application circuit for the relative values
1/2 W resistors. Refer to the typical application circuit for the relative values
25 V electrolytic capacitor, 100 µF or higher is suitable
25 V, 220 µF electrolytic capacitor, ESR in the 100 mΩ to 350 mΩ range
25 V ceramic capacitors. Refer to the typ. appl. circuit for the relative values
STPS130A or any similar schottky diode with V
I
BAT43, 1N5818, or any schottky diode with I
be placed as close as possible to V
1N4001-07 or any similar general purpose rectifier
BC817 or similar NPN general-purpose transistor.
22 µH inductor with I
Equation
F(AV)
> I
C8
C8
220nF
220nF
OUT_MAX
C3
C3
1)
220nF
220nF
220nF
220nF
220nF
220nF
C15
C15
C15
C15
C15
C15
I
I
I
I
2
2
2
2
C Bus
C Bus
C6
C6
C6
C6
470nF
470nF
{
{
{
{
x (V
Doc ID 15335 Rev 4
Vup
Vup
ADDR
ADDR
TTX
TTX
EXTM
EXTM
LX
LX
SDA
SDA
SCL
SCL
Vcc
Vcc
Vcc-L
Vcc-L
SAT
UP_MAX
> I
LNBH23L
LNBH23L
LNBH23L
LNBH23L
P - GND
P - GND
PEAK
/V
D3
D3
D3
D3
D3
D3
IN_MIN
where I
A - GND
A - GND
oRX
)
Notes
pin
PEAK
DSQIN
DSQIN
DSQIN
DSQIN
DSQIN
DSQIN
VoTX
VoTX
VoRX
VoRX
PDC
PDC
PDC
PDC
PDC
PDC
ISEL
ISEL
ISEL
ISEL
ISEL
ISEL
Byp
Byp
F(AV)
is the boost converter peak current (see
RRM
> 0.2 A, V
C10
C10
C10
C10
C10
C10
C10
C10
220nF
220nF
220nF
220nF
220nF
220nF
220nF
220nF
> 25 V and I
C11
C11
C11
C11
220nF
220nF
220nF
220nF
RRM
R2 (RSEL)
R2 (RSEL)
15kOhm
15kOhm
D2
D2
D2
D2
D2
D2
to LNB
to LNB
to LNB
to LNB
500mA max
500mA max
500mA max
500mA max
> 25 V, V
F(AV)
higher than:
F
< 0.5 V. To
LNBH23L