L6585D_07 STMICROELECTRONICS [STMicroelectronics], L6585D_07 Datasheet - Page 3

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

L6585D
1
Figure 2.
AC MAINS
AC MAINS
Typical system block diagram
Device description
Designed in High-voltage BCD Off-line technology, the L6585D embeds a PFC controller, a
half-bridge controller, the relevant drivers and the logic necessary to build an electronic
ballast.
The advanced and precise logic circuitry, combined with the programmability of the End-of-
Life windows comparator threshold, makes the L6585D compliant with either "lamp-to-
ground" or "block capacitor-to ground" configurations.
Another outstanding feature is the possibility of controlling and limiting the lamp voltage
during the ignition phase.
The pre-heating and ignition durations are independently settable as well as the half-bridge
switching frequencies for each operating phases (pre-heating, ignition and normal mode).
Other features (half-bridge over-current with frequency increase, PFC over-voltage) allow
building a reliable and flexible solution with a reduced part count.
The PFC section achieves current mode control operating in Transition Mode; the highly
linear multiplier includes a special circuit, able to reduce AC input current distortion, that
allows wide-range-mains operation with an extremely low THD, even over a large load
range.
The PFC output voltage is controlled by means of a voltage-mode error amplifier and a
precise internal voltage reference.
The driver of the PFC is able to provide 300mA (source) and 600mA (sink) and the drivers of
the half-bridge provide 290mA source and 480mA sink.
C
C
IN
IN
R
R
3
3
R
R
2
2
L
L
PFC
PFC
MULT
MULT
PFCS
PFCS
R
R
PFG
PFG
SNSPF
SNSPF
GND
GND
R
R
13
13
12
12
8
8
4
4
11
11
15
15
ZCD
ZCD
C
C
C
C
OSC
OSC
BULK
BULK
OSC
OSC
1
1
2
2
R
R
RF
RF
R
R
6
6
RUN
RUN
INV
INV
R
R
R
R
10
10
5
5
PRE
PRE
C
C
L6585D
L6585D
C
C
IGN
IGN
COMP
COMP
COMP
COMP
3
3
EOI
EOI
9
9
R
R
D
D
R
R
7
7
Tch
Tch
C
C
R
R
4
4
D
D
CTR
CTR
8
8
EOLP
EOLP
7
7
Vcc
Vcc
R
R
5
5
1
1
R
R
17
17
P
P
6
6
EOL-R
EOL-R
20
20
19
19
18
18
16
16
14
14
BOOT
BOOT
HBCS
HBCS
HV BUS
HV BUS
C
C
Charge
Charge
HSD
HSD
OUT
OUT
LSD
LSD
pump
pump
BOOT
BOOT
R
R
SNSHB
SNSHB
Device description
L
L
B
B
LAMP
LAMP
C
C
BLOCK
BLOCK
C
C
RES
RES
3/25