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LNBS21 数据表(PDF) 9 Page - STMicroelectronics

部件名 LNBS21
功能描述  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
PDF  21 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LNBS21 数据表(HTML) 9 Page - STMicroelectronics

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LNBS21
9/21
∆V
O
Line Regulation
VIN1=15 to 18V
VSEL=0
5
40
mV
VSEL=1
5
60
mV
∆V
O
Load Regulation
VSEL=0 or 1 IOUT = 50 to 750mA
200
mV
IMAX
Output Current Limiting
ISEL=1
650
900
mA
ISEL=0
750
1000
mA
ISC
Output Short Circuit Current
ISEL=1
300
mA
ISEL=0
400
mA
tOFF
Dynamic Overload
protection OFF Time
PCL=0
Output Shorted
900
ms
tON
Dynamic Overload
protection ON Time
PCL=0
Output Shorted
tOFF/10
ms
fTONE
Tone Frequency
TEN=1
20
22
24
KHz
ATONE Tone Amplitude
TEN=1
0.55
0.72
0.9
Vpp
DTONE Tone Duty Cycle
TEN=1
40
50
60
%
tr, tf
Tone Rise and Fall Time
TEN=1
5
10
15
µs
GEXTM External Modulation Gain
∆V
OUT/∆VEXTM,
f = 10Hz to 40KHz
6
VEXTM External Modulation Input
Voltage
AC Coupling
400
mVpp
ZEXTM External Modulation
Impedance
f = 10Hz to 50KHz
260
Ω
VLT
Loopthrough Switch Voltage
Drop (lt1 to LT2)
EN=0,
ILT=300mA,
VMI=12 or
19V
0.35
0.6
V
fSW
DC/DC Converter Switch
Frequency
220
kHz
fDETIN
Tone Detector Frequency
Capture Range
0.4Vpp sinewave
18
24
kHz
VDETIN Tone Detector Input
Amplitude
fIN=22kHz sinewave
0.2
1.5
Vpp
ZDETIN Tone Detector Input
Impedance
150
k
Ω
VOL
Overload Flag Pin Logic
LOW
Tone present
IOL=2mA
0.3
0.5
V
IOZ
Overload Flag Pin OFF
State Leakage Current
Tone absent
VOH = 6V
10
µA
VIL
DSQIN Input Pin Logic
LOW
0.8
V
VIH
DSQIN Input Pin Logic
HIGH
2V
IIH
DSQIN Pins Input Current
VIH = 5V
15
µA
IOBK
Output Backward Current
EN=0
VOBK = 18V
-4
-10
mA
TSHDN Temperature Shutdown
Threshold
150
°C
∆T
SHDN
Temperature Shutdown
Hysteresis
15
°C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit



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