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LNBH25S 데이터시트(PDF) 29 Page - STMicroelectronics

부품명 LNBH25S
상세설명  LNB supply and control IC with step-up and IC interface
PDF  37 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LNBH25S 데이터시트(HTML) 29 Page - STMicroelectronics

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LNBH25S
Electrical characteristics
DocID026736 Rev 2
29/37
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
EffDC/DC
DC-DC converter
efficiency
IOUT = 500 mA
93
%
FSW
DC-DC converter
switching frequency
440
kHz
UVLO
Undervoltage lockout
thresholds
UVLO threshold rising
4.8
V
UVLO threshold falling
4.7
VLP
Low power diagnostic
(LPD) thresholds
VLP threshold rising
7.2
V
VLP threshold falling
6.7
VIL
DSQIN, pin logic low
0.8
V
VIH
DSQIN, pin logic high
2
V
IIH
DSQIN, pin input
current
VIH = 5 V
15
µA
FDETIN
Tone detector
frequency capture
range
(3)
0.4 VPP sine wave
19
22
25
kHz
VDETIN
Tone detector input
amplitude
(3)
Sine wave signal, 22 kHz
0.3
1.5
VPP
ZDETIN
Tone detector input
impedance
150
kΩ
VOL_BPSW
BPSW pin low voltage
IOL_BPSW = 5 mA, DSQIN =
high, EXTM=0, TEN=1
0.7
V
VOL
DSQOUT, FLT pins
logic LOW
DETIN tone present, IOL= 2
mA
0.3
0.5
V
IOZ
DSQOUT, FLT pins
leakage current
DETIN tone absent, VOH = 6 V
10
µA
IOBK
Output backward
current
All VSELx=0, VOBK = 30 V
-3
-6
mA
ISINK
Output low-side sink
current
VOUT forced at VOUT_NOM + 0.1
V
70
mA
ISINK_
TIME-OUT
Low-side sink current
time-out
VOUT forced at VOUT_NOM + 0.1
V
PDO I²C bit is set to 1 after
this time is elapsed
10
ms
IREV
Max. reverse current
VOUT forced at VOUT_NOM + 0.1
V after PDO bit is set to 1
(ISINK_TIME-OUT elapsed)
2
mA
TSHDN
Thermal shutdown
threshold
150
°C
DTSHDN
Thermal shutdown
hysteresis
15
°C
Notes:
(1)
In applications where (VCC -VOUT) > 1.3 V the increased power dissipation inside the integrated LDO must be taken into
account in the application thermal management design.
(2)
Guaranteed by design.
(3)
Frequency range in which the DETIN function is guaranteed. The VPP level is intended on the LNB bus (before the C6
capacitor. See typical application circuit for DiSEqC 2.x). IOUT from 0 to 750 mA, CBUS from 0 to 750 nF.



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