Data Brief
For further information contact your local STMicroelectronics sales office.
November 2006 Rev 1 1/6
6
EVAL6585D-230V
Combo IC for PFC and ballast control
General description
A new control IC, the L6585, has been designed
to manage electronic ballasts for fluorescent
lamps; it includes both Power Factor Correction
and half-bridge sections and embeds a wide
range of features to provide an energy saving and
cost effective solution.
The high-voltage single chip approach optimizes
the management of lamp critical conditions like
start-up (pre-heating and ignition), fault and lamp
replacement. In fact, the internal logic is able to
carry out all of these phases being steered by
precise internal references and timings.
The PFC section has superior performance in
terms of harmonic content mitigation. High Power
Factor (PF) and Total Harmonic Distortion (THD)
reduction are obtained as required by
international norms, especially in case of
Universal input voltage operation.
Particular care has been dedicated to pre-heating
and ignition phases prior to lamp starting, in order
to ensure the proper filament warming up and
extend lamp life.
Innovative circuitry allows an improved control of
the lamp voltage during ignition as well protection
against failures due to lamp ageing. The use of
this new control IC simplifies the industrialization
of electronic ballasts increasing the application
reliability and reducing its dimensions and cost.
For more info about the L6585D please refer to
the related datasheet available at www.st.com.
www.st.com
Evaluation board
230V Demo application description EVAL6585D-230V
2/6
1 230V Demo application description
The design has been developed to drive a 54W TL fluorescent lamp. Specifically created to
drive a T5 lamp, the demo board implements the end of life and the open lamp protections
on the half bridge side, and the over-voltage and feedback disconnection protections on the
PFC side. This circuit is intended to be used with 230V AC mains.
Figure 1. Evaluation board schematic
Title
demo COMBO 230 V
Title
demo COMBO 230 V
Title
demo COMBO 230 V
EPCOS 39mH
footprint
come C13
C18
10u
C18
10u
R34 openR34 open
C1
22u
450V
C1
22u
450V
R11
820k
R11
820k
C3
n.c.
C3
n.c.
C13
100nF
250V
C13
100nF
250V
R18
47
R18
47
R10
820k
R10
820k Q1
STP4NK50Z
TO220
Q1
STP4NK50Z
TO220
OSC
RF
EOI
TCH
EOLP
EOLR
CTR
MULT
COMP
INV
BOOT
HSD
OUT
VCC
LSD
GND
HBCS
PFG
PFCCS
ZCD
R19
0.68
R19
0.68
C10
4.7n
2kV
C10
4.7n
2kV
R6 42.2KR6 42.2K
1
2
3
Q4
bc337
Q4
bc337
1
2
3
4
CON4CON4
1
2
J3J3
R32
8.2k
R32
8.2k
C2 10nC2 10n
C6
1n 1kV
C6
1n 1kV
C23
10n
C23
10n
C13b
shorted
C13b
shorted
R38
12k
R38
12k
C12
470p
C12
470p
C24
330n
C24
330n
C7
1n 1kV
C7
1n 1kV
Q3
STF3NK50FP
Q3
STF3NK50FP
R1
3.6M
R1
3.6M
R29
short
R29
short
R5
n.c.
R5
n.c.
R28
short
R28
short
Q2
STP4NK50Z
TO220
Q2
STP4NK50Z
TO220
C4
470n
C4
470n
R12 1.2MR12 1.2M
R9 13.3kR9 13.3k
C22
n.c.
C22
n.c.
R22
0.82
R22
0.82
R30
240K
R30
240K
R26
680k
R26
680k
C17
100n
C17
100n
R35
1M
R35
1M
R16 56K
R16 56K
C21
n.c.
C21
n.c.
1 5
4 8
T1T1
C20
1n
C20
1n
R13 47R13 47
C16
100n
C16
100n
D3 1N4148D3 1N4148
R4
910k
R4
910k
R8
n.a.
R8
n.a.
C11
1nF
C11
1nF
C9
470n
C9
470n
R23
330
R23
330
1 5
4 8
T2T2
R27
680k
R27
680k
R25
n.a.
R25
n.a.
BZX84C15/ZTX
D5
BZX84C15/ZTX
D5
t
RT1
NTC
t
RT1
NTC
D4
D1N4148
D4
D1N4148
C5 680n
C5 680n
R7
short
R7
short
1
4
3
2
-+-+
R20
47
R20
47
R3
910k
R3
910k
R15
62k
R15
62k
R37
510k
R37
510k
R2
3.6M
R2
3.6M
R14
56k
R14
56k
C19
10n
C19
10n
R36
510k
R36
510k
R21
short
R21
short
R17 47R17 47
R24
n.a.
R24
n.a.
1 2
L1
1.35mH
L1
1.35mH
D2
D1N4148
D2
D1N4148
F1
FUSE (2A)
F1
FUSE (2A)
R31
20k
R31
20k
C8
330n
C8
330n
C15
100n
C15
100n
D1
STTH1L06
DO41
D1
STTH1L06
DO41
C14
100n
C14
100n
R33
240k
R33
240k
EVAL6585D-230V 230V Demo application description
3/6
Table 1. Part list
Name Value
BR1 DF06S
R1, R2 3.6MΩ
R3, R4 910K
R5 n.c
R6 42.2KΩ
R7 short
R8 n.c
R9 13.3KΩ
R10, R11 820KΩ
R12 1.2MΩ
R13 47Ω
R14 47KΩ
R15 62KΩ
R16 56KΩ
R17, R18 47Ω
R19 0.68, 1W
R20 47Ω
R21 short
C1 22µF, 450V, EPCOS B43888A5226M9
C2 10nF
C3 n.c
C4 470nF
C5 680nF
C6, C7 1nF, 1KV
C8 330nF
C9 470nF, 630V, EPCCOS B32652
C10 4.7nF, 2kV EPCOS B32653
C11 1nF, 630V
C12 470pF
C13 100nF, 250V
C13b short
C14, C15 100nF, X2, 275Vac, EPCOS
C16 100nF
C17 100nF
230V Demo application description EVAL6585D-230V
4/6
C18 10µF, 35V
C19 10nF
R22 0.82
R23 330
R24 n.c
R25 n.c
R26, R27 680KΩ
R28, R29 short
R30 240KΩ
R31 20KΩ
R32 8.2KΩ
R33 240KΩ
R43 open
R35 1MΩ
R36, R37 510KΩ
R38 12KΩ
Q1 STP4NK50ZD
Q2 STP4NK50ZD
Q3 STD3NK50Z1
Q4 BC817
IC1 L6585D
C20 1nF
C21 n.c
C22 n.c
C23 10nF
C24 330nF
T1 E25, 2.1mH, EPCOS T2363
T2 39mH, EPCOS B822731
F1 2A fuse
RT1 NTC, 16R
D1 STTH1L06
D2 1N4148
D3 1N4148
D4 1N4148
Table 1. Part list (continued)
Name Value
EVAL6585D-230V Revision history
5/6
2 Revision history
D5 BZX84C15ZTX
L1 ITACOIL, 1.3mH
Table 1. Part list (continued)
Name Value
Table 2. Revision history
Date Revision Changes
22-Nov-2006 1 First issue
EVAL6585D-230V
6/6
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