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L6572 Datasheet(PDF) 15 Page - STMicroelectronics

Part # L6572
Description  High voltage smart ballast controller
PDF  22 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6572 Datasheet(HTML) 15 Page - STMicroelectronics

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L6572
Functional description
Doc ID 023882 Rev 1
15/22
Figure 7.
Two-step dimming
Figure 6.
Ignition recognition
t
t
t
ignition
preheat-phase
ignition-phase
normal operation /
powerboost-phase
free-running
synchronized
free -running
output
clock-generator
U(C)
clock-generator
output-
stage
output
curr.-reg.
t
t
ratedresonant
current
a)
b)
c)
d)
e)
t
t
f)
g)
output "A"
counter
output "B"
counter
AM14886v1
t
t
a)
b)
Line voltage
(on / off)
Light output
(T
<T
)
t
t
e)
f)
Supply -
Voltage Vs
Voltage
TSD- pin
t
c)
Light level
Flip-Flop
junction
PB
d)
Reset
Light level
Flip- Flop
V
-
threshold
TSD
t
AM14887v1



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