ST ILB004V1 User Manual
Data Brief
For further information contact your local STMicroelectronics sales office.
December 2008 Rev 1 1/4
4
STEVAL-ILB004V1
Demonstration board: multipower ballast for T5 fluorescent
tube lamps based on the ST7LIT19BF1 and STP5NK60Z
Features
■ Improved efficiency
■ Increased lamp life
■ Lightweight with smaller dimensions
■ Better lamp power control
Description
The STEVAL-ILB004V1 demonstration board is
an electronic ballast that adds “intelligence” to
ballast circuits, thanks to the use of a
microcontroller. Rather than having a dedicated
circuit for each tube lamp with a single ballast, the
STEVAL-ILB004V1 can drive many different lamp
groups. The system is capable of recognizing T5-
type fluorescent lamps, with power ratings of 24
W, 39 W, 54 W and 80 W. It consists of two main
blocks: a boost converter (power factor controller)
working in transition mode (fixed TON and
variable frequency), and an inverter in half-bridge
configuration working in zero-voltage switching.
Both the ballast and PFC stages are controlled by
the ST7LIT19BF1 microcontroller, which provides
its signal to the L6382D5 power management
unit. The power management unit delivers the
right voltage and current levels to the
STP5NK60Z power MOSFET. After tube
recognition, the system sets the parameters to
drive the lamp correctly.
STEVAL-ILB004V1
www.st.com
Schematic diagram STEVAL-ILB004V1
2/4
1 Schematic diagram
Figure 1. Electrical schematic
PFC Gate Driver
U1
ST7LITE1B 20pin
Vdd
2
RESET
3
COMPIN+/SS/AIN0/PB0
4
SCK/AIN1/PB1
5
MISO/AIN2/PB2
6
MOSI/AIN3/PB3
7
COMP-/CLKIN/AIN4/PB4
8
AIN5/PB5
9
AIN6/PB6
10
PA7(HS)/COMPOUT
11
PA6/MCO/ICCCLK/BREAK
12
PA5(HS)/ATPWM3/ICCDATA
13
PA4(HS)/ATPWM2
14
PA3(HS)/ATPWM1
15
PA2(HS)/ATPWM0
16
PA1(HS)/ATIC
17
PA0(HS)/LTIC
18
OSC2/PC1
19
OSC1/CLKIN/PC0
20
Vss
1
R46
220.6W
U2
L6382
PFI
1
LSI
2
HSI
3
HEI
4
PFG
5
NC
6
TPR
7
GND
8
LSG
9
VCC
10
BOOT
11
HSG
12
OUT
13
NC
14
HVSU
15
NC
16
HEG
17
CSO
18
CSI
19
VREF
20
D4
-+
D7
BRIDGE RB156
1
4
3
2
High Side Input
R19 10
Q2
STP6NK60Z
Q3
STP6NK60Z
R21 10
R22 33
R23
1
2W,1%
L1
1.2mH
R27
3k9
C15
100nF
400V
C13
100nF
50V
R53
1M
T1
2x47mH
1 3
2 4
RsenseCurrent
CSI
R28
820
R18
00.6W
CSO
PFC Gate Driver
C23
68n
C28
10p
PFC OC
Lamp Type Detection Circuit Enable
PFC Mosfet Gate
R9
0.5
C25
10p
C1
220n
275VAC
C20
1n
R5
18k
PFC Mosfet Gate
R43
10k
J1
AC
L
N
PE
R44
10k
C26
10p
Out pin
F1
FUSE
T2
2.0mH
35
81
C3
470n 275VAC
D2
STTH1L06
1 2
NTC1
10
1 2
+
C7
22uF 450V
Q1
STP6NK60Z
1
23
R45
10k
C6
4n7
C16
10n
1600V
C4
100p
J3
ICC-programmer
+
1
+
3
+
5
+
7
+
9
+
2
+
4
+
6
+
8
+
10
C5
2n7
+
C11
47uF
35V
R4
750k
RESET
AverageLampVoltage
DC5V
R29
1M
R37
220k
R38
220k
R39
220k
R40
2k2
LampTypeDetection Circuit
R30
10k
J4
jump-prog/run
1
2
3
Low Side Input
C8
1nF
630V
R16
220.6W
C17
10n
R41
2k2
J5
VDC-5V-programm.
1
2
RESET
High Side Input
DC5V
D12
1N4007
2 1
R11
750k
Vcap
PFC Vout Sense
RsenseCurrent
C18
470n
DC5V
Vcap
R3
750k
C12
100nF
C2
1n
275VAC
C27
10p
R12
750k
DC5V
Out pin
C14
10n
PFC VinWaveform
LampPresence
C10
10nF
CSO
R6
27k
R14
1k
Q5
BF420
R13
10k
D13
STTH1L06A
2 1
J2
T5 Lamps
1
23
4
Q4
BF421
LampPresence
PFC Vout Sense
PFC VinWaveform
R24
10k
DC400V
R31
330k
C22
470n
AverageCurrent
C9
220nF
C30
330n
R32
330k
LampTypeDetection
R47
47k
R48
3.3k
R49
10k
LampTypeDetection Circuit
R54
10k
R51
47k
R52
1.8k
PeakLampVoltage
R33
330k
D14
STTH1L06
Vcap
PFC Zero Current Detect
R34
120k
AverageLampVoltage
CSI
R2
1M
350V
R7
10
RsenseCurrent
PFC OC
LampTypeDetection
PFC Zero Current Detect
D6
1N4148 SMD
PeakLampVoltage
C19
4n7
100V
Low Side Input
AverageCurrent
R8
47k
R10
1k
R35
75k
R1
1M
350V
R36
22k
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