L6585D_07 STMICROELECTRONICS [STMicroelectronics], L6585D_07 Datasheet - Page 14

• Manufacturer Part Number: L6585D_07
• Description: Combo IC for PFC and ballast control
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Application information
5.1.3
Figure 5.
14/25
V
V
V
V
HBCS
HBCS
LAMP
LAMP
V
V
EOI
EOI
Tch
Tch
f
f
CC
CC
HB
HB
V
V
V
V
CC(off)
CC(off)
4.63V
4.63V
CC(on)
CC(on)
Oscillator, pre-heating and ignition sequence
Run mode (time interval C
As the voltage at EOI exceeds 1.9V and the lamp has ignited, the L6585D enters Run mode
and remains in this condition unless one of the protections (all enabled in this mode) is
trigged.
The switching frequency reaches the F
Equation 4
1.9V
1.9V
f
f
f
f
2V
2V
PRE
PRE
RUN
RUN
A
A
τ = R
τ = R
D
D
x C
x C
1.5V
1.5V
D
D
B
B
C
C
V
V
V
V
HBCS
HBCS
V
V
LAMP
LAMP
EOI
EOI
Tch
Tch
f
f
CC
CC
HB
HB
4.63V
4.63V
1.5V
1.5V
V
V
V
V
CC(on)
CC(on)
CC(off)
CC(off)
1.9V
1.9V
f
f
f
f
2V
2V
PRE
PRE
RUN
RUN
A
A
Figure
f
RUN
RUN
B
B
=
value set by R
---------------------------------- -
R
5)
C
C
RUN
1.328
⋅
V
V
V
V
C
HBCS
HBCS
LAMP
LAMP
V
V
EOI
EOI
Tch
Tch
OSC
f
f
CC
CC
HB
HB
RUN
1.5V
1.5V
V
V
V
V
CC(off)
CC(off)
1.9V
1.9V
f
f
2V
2V
f
f
CC(on)
CC(on)
PRE
PRE
RUN
RUN
and C
A
A
4.63V
4.63V
OSC
:
B
B
L6585D
V
V
C
C
Z
Z