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AN2982 Datasheet(PDF) 22 Page - STMicroelectronics

Part # AN2982
Description  This application note describes the STEVAL-ILB005V2 demonstration board equipped with the L6585DE lighting controller
PDF  31 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2982 Datasheet(HTML) 22 Page - STMicroelectronics

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Ballast stage design
AN2982
22/31
Doc ID 15599 Rev 1
The minimum startup current of the L6585DE is equal to Icc,on = 370 µA. This current has to
be delivered to the IC at the minimum input voltage (125 Vpk), therefore a total resistance
equal to:
Equation 57
The network is divided into 5 x 68 k
Ω resistors in order to avoid damage due to the lamp
striking voltage.
A C1 = 10 µF followed by a 100 nF ceramic capacitor is used as the Vcc bulk capacitor.
Ω
=
=
k
337
I
V
R
on
,
cc
min
,
in
tot
,
su



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