L6585D_07 STMICROELECTRONICS [STMicroelectronics], L6585D_07 Datasheet - Page 15

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

L6585D
6
Figure 6.
V
V
V
PFC
PFC
PFC
V
V
V
CTR
CTR
CTR
EOLR
EOLR
EOLR
CB
CB
CB
OUT
OUT
OUT
R
R
R
FL
FL
FL
AMPLITUDE
AMPLITUDE
AMPLITUDE
V
V
V
COMPARATOR
COMPARATOR
COMPARATOR
V
V
V
or R
or R
or R
REF
REF
REF
REF
REF
REF
CTR
CTR
CTR
HVBUS
HVBUS
HVBUS
WINDOW
WINDOW
WINDOW
EOLP
EOLP
EOLP
End-of-life detection circuitry and waveforms
– W/2
– W/2
– W/2
+ W/2
+ W/2
+ W/2
FH
FH
FH
End of life – window comparator
To detect the ageing of the lamp with particular attention to the effect appearing as
asymmetric rectification, a programmable window comparator has been introduced
(centered around “V
higher than V
By means of the resistor connected to the EOLP pin, it is possible to select:
1.
2.
FIXED REF.
FIXED REF.
FIXED REF.
INTERNAL
INTERNAL
INTERNAL
(100Hz or 120Hz)
(100Hz or 120Hz)
(100Hz or 120Hz)
the sensing mode:
–
–
the half-window amplitude (V
INPUT
INPUT
INPUT
R
R
R
P2
P2
P2
BOOT
BOOT
BOOT
fixed reference: the centre of the window comparator (V
internal reference;
tracking reference: the centre of the window comparator is the voltage at pin CTR
(that is a signal proportional to the PFC output voltage).
EOLR
EOLR
EOLR
R
R
R
HSD
HSD
HSD
OUT
OUT
OUT
LSD
LSD
LSD
P1
P1
P1
C
C
C
REF
BOOT
BOOT
BOOT
+ V
REF
W
HV BUS
HV BUS
HV BUS
/2 or lower than V
” with amplitude “V
R
R
R
V
V
V
E2
E2
E2
K
K
K
V
V
V
LAMP
LAMP
LAMP
R
R
R
PFC
PFC
PFC
E1
E1
E1
OUT
OUT
OUT
W
/2
/2
/2
/2): 220mV or 720mV.
C
C
C
BLOCK
BLOCK
BLOCK
REF –
V
V
V
V
V
V
W
LAMP
LAMP
LAMP
EOLR
EOLR
EOLR
”) that triggers when the EOL-R voltage is
V
V
V
V
V
V
AMPLITUDE
AMPLITUDE
AMPLITUDE
COMPARATOR
COMPARATOR
COMPARATOR
REF
REF
REF
V
K
K
K
WINDOW
WINDOW
WINDOW
EOLP
EOLP
EOLP
W
V
V
V
V
V
V
V
V
V
V
V
V
REF
REF
REF
/2.
REF
REF
REF
REF
REF
REF
REF
REF
REF
CTR
CTR
CTR
– W/2
– W/2
– W/2
+ W/2 + V
+ W/2 + V
+ W/2 + V
– W/2 – V
– W/2 – V
– W/2 – V
+ W/2
+ W/2
+ W/2
FIXED REF.
FIXED REF.
FIXED REF.
R
R
R
INTERNAL
INTERNAL
INTERNAL
FL
FL
FL
or R
or R
or R
INPUT
INPUT
INPUT
FH
FH
FH
BOOT
BOOT
BOOT
Z1
Z1
Z1
Z1
Z1
Z1
End of life – window comparator
+ V
+ V
+ V
– V
– V
– V
EOLR
EOLR
EOLR
HSD
HSD
HSD
OUT
OUT
OUT
LSD
LSD
LSD
R2
R2
R2
R2
R2
R2
V
V
V
Z2
Z2
Z2
C
C
C
BOOT
BOOT
BOOT
V
V
V
REF
Z1
Z1
Z1
) is fixed at 2.5V by an
R
R
R
HV BUS
HV BUS
HV BUS
E2
E2
E2
V
V
V
K
K
K
V
V
V
LAMP
LAMP
LAMP
R
R
R
E1
E1
E1
C
C
C
BLOCK
BLOCK
BLOCK
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