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LNBP21 数据表(PDF) 9 Page - STMicroelectronics

部件名 LNBP21
功能描述  LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
PDF  24 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

LNBP21 数据表(HTML) 9 Page - STMicroelectronics

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Table 5: Electrical Characteristics For LNBP Series (TJ = 0 to 85°C, EN=1, LLC=0, TEN=0, ISEL=0,
PCL=0, DSQIN=0, VIN=12V, IOUT=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 = 500 mA TEN=VSEL=LLC=1
8
15
V
VLT1
LT1 Input Voltage
20
V
IIN
Supply Current
IO = 0mA TEN=VSEL=LLC=1
EN=1
20
40
mA
EN=0
2.55mA
VO
Output Voltage
IO = 500 mA VSEL=1
LLC=0
17.3
18
18.7
V
LLC=1
19
V
VO
Output Voltage
IO = 500 mA VSEL=0
LLC=0
12.5
13
13.5
V
LLC=1
14
V
∆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 500mA
200
mV
IMAX
Output Current Limiting
ISEL=1
400
550
mA
ISEL=0
500
650
mA
ISC
Output Short Circuit Current
ISEL=1
200
mA
ISEL=0
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
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
DSQOUT Pin Logic LOW
Tone present
IOL=2mA
0.3
0.5
V
IOZ
DSQOUT 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



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