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IRPLMB1E Scheda tecnica(PDF) 11 Page - International Rectifier

Il numero della parte IRPLMB1E
Spiegazioni elettronici  Programmable run frequency
PDF  13 Pages
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Produttore elettronici  IRF [International Rectifier]
Homepage  http://www.irf.com
Logo IRF - International Rectifier

IRPLMB1E Scheda tecnica(HTML) 11 Page - International Rectifier

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IRPLMB1E
9. Design Tip: Auto-restart Option
The design can be modified to include re-lamp/auto-
restart option as shown in Fig. 9.1.
The resistors Rsupply must be moved across the
upper lamp filament and the lamp connected to the
bus voltage, instead than to ground. When the lamp
1
2
3
4
VCC
COM
VCO
LO
VS
HO
VB
8
7
6
5
FMIN
MHS
CBS
CVCC
RFMIN
F1
CBUS
RSUPPLY
DCP2
DCP1
LRES
CRES
CSNUB
CVCO
BR1
LF
CF
MLS
CDC
LAMP
Fig. 9.1: Circuit Modification to include auto-restart option
is replaced, Rsupply together with the upper filament
of the lamp provide a path from the DC bus to supply
the micro-power current to the IR2520 and to restart
the IR2520 as soon as VCC exceeds the UVLO+
threshold. Rsupply need to be able to handle high
voltage. If using SMD components, 2 resistors are
needed.



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