LNBH24 STMicroelectronics, LNBH24 Datasheet - Page 26

• Manufacturer Part Number: LNBH24
• Description: Dual LNB supply and control IC with step-up and I2C interface
• Manufacturer: STMicroelectronics

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Figure 26. DC-DC converter efficiency vs.
Figure 28. DSQIN tone enable transient
DSQIN
DSQIN
LNB
LNB
100
100
90
90
80
80
70
70
60
60
50
50
40
40
OUT
OUT
-10
-10
EN=VSEL=LLC=1
EN=VSEL=LLC=1
V
V
V
V
EN=TTX=1, TEN=0
EN=TTX=1, TEN=0
CC
CC
CC
CC
= 12 V, I
= 12 V, I
0
0
= 12 V
= 12 V
temperature
response
10
10
OUT
OUT
= 750 mA
= 750 mA
20
20
30
30
T [°C]
T [°C]
40
40
50
50
60
60
70
70
80
80
90
90
Figure 27. 22 kHz tone waveform
Figure 29. DSQIN tone disable transient
LNB
LNB
LNB
LNB
DSQIN
DSQIN
OUT
OUT
OUT
OUT
V
V
EN=TEN=TTX=1
EN=TEN=TTX=1
CC
CC
= 12 V
= 12 V
response
V
V
EN=TTX=1, TEN=0
EN=TTX=1, TEN=0
CC
CC
= 12 V
= 12 V