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LNBH21 数据表(PDF) 10 Page - STMicroelectronics

部件名 LNBH21
功能描述  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
PDF  20 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LNBH21 数据表(HTML) 10 Page - STMicroelectronics

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LNBH21
10/20
ELECTRICAL CHARACTERISTICS FOR LNBP SERIES (TJ = 0 to 85°C, EN=1, TTX=0/1, DSQIN=LOW,
LLC=TEN=PCL=VSEL=0, VIN=12V, IO=50mA, unless otherwise specified. See software description
section for I2C access to the system register).
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VIN
Supply Voltage
IO = 750 mA TEN=VSEL=LLC=1
8
15
V
II
Supply Current
EN=TEN=VSEL=LLC=1, NO LOAD
20
40
mA
EN=0
3.5
7
VO
Output Voltage
IO = 750 mA VSEL=1
LLC=0
17.3
18
18.7
V
LLC=1
18.7
19.5
20.3
VO
Output Voltage
IO = 750 mA VSEL=0
LLC=0
12.75
13.25
13.75
V
LLC=1
13.75
14.25
14.75
∆V
O
Line Regulation
VIN1= 8 to 15V
VSEL=0
5
40
mV
VSEL=1
5
60
∆V
O
Load Regulation
VSEL=0 or 1, IO = 50 to 750mA
200
mV
IMAX
Output Current Limiting
ISEL = Floating or V > 3.3V
750
1000
mA
ISEL = GND
450
700
ISC
Output Short Circuit Current
VSEL=0
300
mA
VSEL=1
200
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
8
15
µs
GEXTM External Modulation Gain
∆V
OUT/∆VEXTM,
f = 10Hz to 50KHz
6
VEXTM External Input Voltage
AC Coupling
400
mVPP
ZEXTM External Modulation
Impedance
f = 10Hz to 50KHz
260
Ω
fSW
DC/DC Converter Switching
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
DSQOUT Pin Logic LOW
Tone present
IOL=2mA
0.3
0.5
V
IOZ
DSQOUT Pin 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
-6
-15
mA
TSHDN Temperature Shutdown
Threshold
150
°C
∆T
SHDN
Temperature Shutdown
Hysteresis
15
°C



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