LNBH24LQTR STMicroelectronics, LNBH24LQTR Datasheet - Page 16

• Manufacturer Part Number: LNBH24LQTR
• Description: IC LNBS DUAL SUPPLY/CTRL 32-QFN
• Manufacturer: STMicroelectronics

Specifications of LNBH24LQTR

• Applications: Converter, Analog and Digital Satellite STB Receivers/SatTV
• Voltage - Input: 8 ~ 15 V
• Number Of Outputs: 2
• Voltage - Output: 13.3V, 18.2V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10615-2

LNBH24 software description
Table 7.
7.4
16/25
PCL
X
0
1
TTX
X
0
0
0
0
1
1
0
0
1
Truth table
X = don't care
Values are typical unless otherwise specified
Valid with TTX pin floating
Diagnostic received data (I²C read mode) for both sections
A/B
The LNBH24L can provide to the MCU master a copy of the diagnostic system register
information via I²C bus in read mode. The read mode is master activated by sending the
chip address with R/W bit set to 1. At the following master generated clocks bits, LNBH24L
issues a byte on the SDA data bus line (MSB transmitted first). At the ninth clock bit the
master can:
●
●
Three bits of the register are read back as a copy of the corresponding write output voltage
register status (LLC, VSEL, EN), two bits convey diagnostic information about the over-
temperature (OTF), output over-load (OLF) and three bit are for internal usage (TEST1-2-3)
and must be disregarded by the MCU software. In normal operation the diagnostic bits are
set to zero, while, if a failure is occurring, the corresponding bit is set to one. At start-up all
the bits are reset to zero.
TEN
X
0
1
0
Acknowledge the reception, starting in this way the transmission of another byte from
the LNBH24L
No acknowledge, stopping the read mode communication
LLC
0
0
1
1
X
VSEL
0
1
0
1
X
EN
1
1
1
1
1
1
1
1
1
1
1
0
TEST4 TEST5
Doc ID 16857 Rev 2
X
0
0
0
0
0
0
0
0
0
0
0
X
0
0
0
0
0
0
0
0
0
0
0
V
V
V
V
Internal 22 kHz controlled by DSQIN pin (only if
TTX=1)
Internal 22 kHz tone output on V
activated
Internal 22 kHz generator disabled, EXTM
modulation enabled
V
OFF
V
ON
Pulsed (Dynamic) current limiting is selected
Static current limiting is selected
Power block disabled
oRX
oRX
oRX
oRX
oRX
oRX
= 13.3 V, V
= 18.2 V, V
= 14.3 V, V
= 19.2 V, V
output is ON, V
output is ON, V
UP
UP
UP
UP
=14.4 V, (V
=19.3 V, (V
=15.4 V, (V
=20.3 V, (V
Function
oTX
oTX
Tone generator output is
Tone generator output is
UP
UP
UP
UP
oTX
-V
-V
-V
-V
oRX
oRX
oRX
oRX
is always
=1.1 V typ.)
=1.1 V typ.)
=1.1 V typ.)
=1.1 V typ.)
LNBH24L