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LNBEH21 数据表(PDF) 12 Page - STMicroelectronics

部件名 LNBEH21
功能描述  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE
PDF  22 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LNBEH21 数据表(HTML) 12 Page - STMicroelectronics

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LNBEH21
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Table 5: Electrical Characteristics TJ = 0 to 85°C, EN=1, LLC=PCL=OM=VOM=0, 22KHz Tone
Disabled, TTX=0/1, ISEL=High, VI=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
VI
Supply Voltage
VO = 20.5V, IO = 750 mA Tone enabled
8
15
V
II
Supply Current
VO = 20.5V, Tone Enabled,
NO LOAD
EN=1
20
40
mA
EN=0
3.5
7
VO
Output Voltage
OM=0, VOM=1
(or OM=1, VOM=0),
IO=750mA, TEN/VSEL=High
LLC=0
18.7
19.5
20.3
V
LLC=1
20.5
VO
Output Voltage
OM=0, VOM=1
(or OM=1, VOM=0),
IO=750 mA, TEN/VSEL=Low
LLC=0
12.75
13.25
13.75
V
LLC=1
14.25
∆V
O
Line Regulation
VI= 8 to 15V,
OM=0, VOM=0
5
40
mV
VI= 8 to 15V,
OM=0, VOM=1
5
60
∆V
O
Load Regulation
OM=0, VOM=0/1, IO = 50 to 750mA
200
mV
13/18V
tr- tf
13/18V Rise and Fall
transition Time (to be
measured at the 90% and
10% voltage range)
OM=VOM=1, TEN/VSEL from low to high,
IO = 6 to 450 mA, CO = 10 to 330 nF
575
µs
IMAX
Output Current Limiting
ISEL
≥ 3.3V or Floating
750
1000
mA
ISEL = GND
450
700
ISC
Output Short Circuit Current
300
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
OM=0, TEN/VSEL=High
20
22
24
KHz
ATONE Tone Amplitude
OM=0, TEN/VSEL=High
0.55
0.72
0.9
VPP
DTONE Tone Duty Cycle
OM=0, TEN/VSEL=High
40
50
60
%
tr, tf
Tone Rise and Fall Time
OM=0, TEN/VSEL=High
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
TEN/VSEL Input Pin Logic
LOW
0.8
V
VIH
TEN/VSEL Input Pin Logic
HIGH
2V
IIH
TEN/VSEL Pin Input
Current
VIH = 5V
15
µA



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