LNBH23PPR STMicroelectronics, LNBH23PPR Datasheet - Page 7
![IC LNB SUPPLY/CTRL POWERSSO-24](/photos/7/55/75560/lnbh23ppr_sml.jpg)
LNBH23PPR
Manufacturer Part Number
LNBH23PPR
Description
IC LNB SUPPLY/CTRL POWERSSO-24
Manufacturer
STMicroelectronics
Datasheet
1.LNBH23PPR.pdf
(32 pages)
Specifications of LNBH23PPR
Applications
Converter, Analog and Digital STB Receivers/SatTV
Voltage - Input
8 ~ 15 V
Number Of Outputs
1
Voltage - Output
13.4V, 18.5V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
PowerSSO-24
Output Voltage
25 V
Output Current
1000 mA
Input Voltage
8 V to 15 V
Switching Frequency
220 KHz
Operating Temperature Range
- 25 C to + 125 C
Mounting Style
Through Hole
Duty Cycle (max)
57 %
For Use With
497-8717 - DEMO BOARD BASED ON LNBH23497-8336 - BOARD EVAL BASED ON LNBH23
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6121-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LNBH23PPR
Manufacturer:
ST
Quantity:
20 000
Part Number:
LNBH23PPR-MYS
Manufacturer:
ST
Quantity:
20 000
Part Number:
LNBH23PPR/1B
Manufacturer:
ST
Quantity:
20 000
LNBH23
2.7
2.8
2.9
2.10
V
This means that VCTRL=0 must be used only for short time to avoid the higher power
dissipation. In stand-by condition (EN bit LOW) all the I²C bits and the TTX pin must be set
LOW (if the TTX pin is not used it can be left floating but the TTX bit must be set LOW during
the stand-by condition).
Diagnostic and protection functions
The LNBH23 has 5 diagnostic internal functions provided via I²C bus by reading 5 bits on
the system register (SR bits in read mode). All the diagnostic bits are, in normal operation
(no failure detected), set to LOW. Two diagnostic bits are dedicated to the over-temperature
and over-load protections status (OTF and OLF) while, the remaining 3 bits, are dedicated to
the output voltage level (VMON), 22 kHz tone (TMON) and to the minimum load current
diagnostic function (IMON).
Output voltage diagnostic - VMON
When V
long as the output voltage level is below the guaranteed limits the VMON I²C bit is set to "1".
The output voltage diagnostic is valid only with LLC=0. Any VMON information with LLC=1
must be disregarded by the MCU.
22 kHz tone diagnostic - TMON
The 22 kHz tone can be internally detected and monitored if DETIN pin is connected to the
LNB output bus (see typical application circuits
The tone diagnostic function is provided with the TMON I²C bit. If the 22 kHz Tone amplitude
and/or the tone frequency is out of the guaranteed limits (see TMON limits in the electrical
characteristics
Minimum output current diagnostic - IMON
In order to detect the output load absence (no LNB connected on the bus or cable not
connected to the IRD) the LNBH23 is provided with a minimum output current flag by the
IMON I²C bit in read mode, which is set to "1" if the output current is lower than 12 mA
typically with ITEST=1 and 6 mA with ITEST=0. The minimum current diagnostic function
(IMON) is always active. In order to make it work even in a multi-IRD configuration (multi-
switch), where the supply current could be sunk only from the higher supply voltage
connected to the multi-switch box, the LNBH23 is provided with the AUX I²C bit which can
be set HIGH, in write mode by the MCU, before to read the IMON I²C bit status, to force the
LNBH23 output voltage as the highest voltage on the bus (22 V typ.) during the minimum
current diagnostic phase. When the AUX bit is set to HIGH, the V
V
the AUX function is used to force the V
LOW as soon as the minimum current test phase is expired, so that the V
controlled again as per the VSEL/LLC bits status. In order to avoid false triggering, the
IMON function must be used only with the 22 kHz tone transmission deactivated
(TEN=TTX=0 and DSQIN=LOW), otherwise the IMON bit could be erroneously set to 0 even
if the output current is below the minimum current thresholds (6 mA or 12 mA). Any TMON
information with 22 kHz tone enabled must be disregarded by the MCU.
oRX
UP
is set to 22.75 V (V
=13.4 V) you will have V
SEL
=0 or 1 and LLC=0, the output voltage pin (V
Table
13), the TMON I²C bit is set to "1".
UP
= V
UP
oRX
Doc ID 13356 Rev 7
=19.25 V typ when V
+0.75 V typ.) independently of the VSEL/LLC bits status. If
oRX
to 22 V, it is recommended to set the AUX bit to
Figure
SEL
4) through a decoupling capacitor.
oRX
=1 and 20.25 V with V
) is internally monitored and, as
oRX
Application information
is set to 22 V (typ.) and
oRX
voltage will be
SEL
=LLC=1.
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