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LNBH25SPQR Datasheet(PDF) 18 Page - STMicroelectronics

Part # LNBH25SPQR
Description  LNB supply and control IC with step-up and IC interface
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LNBH25SPQR Datasheet(HTML) 18 Page - STMicroelectronics

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 18 / 37 page
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Typical application circuits
LNBH25S
18/37
DocID026736 Rev 2
Component
Notes
D2
1N4001-07, S1A-S1M, or any similar general purpose rectifier
D3
BAT54, BAT43, 1N5818, or any low power Schottky diode with IF(AV) > 0.2 A,
VRRM > 25 V, VF < 0.5 V. To be placed as closer as possible to VOUT pin
L1
With COMP = 0, use 10 µH inductor with ISAT > IPEAK where IPEAK is the boost
converter peak current
or
with COMP=1 and C2 = 22 µF, use 6.8 µH inductor with ISAT > IPEAK where IPEAK is
the boost converter peak current
L2
220 µH - 270 µH inductor as per DiSEqC 2.x specification
TR1
MMBTA92, 2STR2160 or any low power PNP with IC > 250 mA, VCE > 30 V, can
be used
Also any small power PMOS with ID > 250 mA, RDS(on) < 0.5 W, VDS > 20 V, can be
used



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