ST ILB004V1 User Manual

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 T5­type 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

Data Brief

STEVAL-ILB004V1

December 2008 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Schematic diagram STEVAL-ILB004V1

1 Schematic diagram

Figure 1. Electrical schematic

C16

10n

DC5V

R29

LampTypeDetection Circuit

R21 10

RsenseCurrent

3
2
1

jump-prog/run

T5 Lamps

1M

R2312W,1%

J5

1600V

R30

10k

PFC Zero Current Detect

10k

R45

10k

R44

10k

R43

DC5V

1

2

VDC-5V-programm.

J2

LampPresence

C17

10n

C28

10p

U1

C9

220nF

4

R54

10k

Q4

BF421

R47

47k

D14

STTH1L06

CSO

C14

10n

High Side Input

Low Side Input

17

14

15

16

20

19

18

OSC2/PC1

PA0(HS)/LTIC

PA1(HS)/ATIC

PA4(HS)/ATPWM2

PA3(HS)/ATPWM1

PA2(HS)/ATPWM0

OSC1/CLKIN/PC0

Vdd2RESET3COMPIN+/SS/AIN0/PB0

SCK/AIN1/PB15MISO/AIN2/PB26MOSI/AIN3/PB37COMP-/CLKIN/AIN4/PB4

Vss

1

4

10nF

C10

RESET

LampTypeDetection

C30

330n

R48

3.3k

R49

10k

LampTypeDetection Circuit

PFC Gate Driver

LampPresence

11

12

13

ST7LITE1B 20pin

PA7(HS)/COMPOUT

PA6/MCO/ICCCLK/BREAK

PA5(HS)/ATPWM3/ICCDATA

J3

AIN5/PB59AIN6/PB6

8

10

PFC OC

AverageCurrent

PFC Vout Sense

PFC VinWaveform

Q5

BF420

R51

47k

R52

1.8k

Lamp Type Detection Circuit Enable

RESET

10

+2+4+6+8+
+1+3+5+7+

9

ICC-programmer

PeakLampVoltage

LampTypeDetection

AverageLampVoltage

Vcap

R31

330k

R32

330k

R33

330k

R34

D6

R35

PeakLampVoltage

10k

4n7

2n7

C5

47k

PFC Mosfet Gate

10k

C22

470n

120k

1N4148 SMD

C19

75k

R36

22k

C23

68n

4n7

100V

CSI

R27

R18

CSO

C27

10p

PFC Gate Driver

RsenseCurrent

3k9

C20

R28

CSI

R53

Q2

STP6NK60Z

R19 10

00.6W

DC5V

19

20

CSI

VREF

U2

PFI1LSI2HSI3HEI4PFG5NC6TPR7GND8LSG9VCC

C25

10p

C26

10p

Low Side Input

C8

Out pin

1n

820

Vcap

R38

220k

R39

220k

R40

2k2

R37

220k

R41

2k2

DC5V

Vcap

DC400V

R11

750k

NTC1

10

1 2

D2

STTH1L06

1 2

35

D12

1N4007

2.0mH

81

2 1

T2

R3

750k

C3

470n 275VAC

3

D7

BRIDGE RB156

4

R11M350V

F1

FUSE

1

2 4

T1

1 3

C1

220n

275VAC

L

N

J1

2

-+

2x47mH

R21M350V

AC

PE

AverageLampVoltage

C7

22uF 450V

+

R12

750k

R14

PFC Vout Sense

STP6NK60Z

23

Q1

R7

27k

R6

PFC VinWaveform

PFC Zero Current Detect

R4

750k

C21n275VAC

C18

470n

R13

1k

C6

PFC OC

1k

R10

R9

0.5

1

R8

10

R22 33

D4

100p

C4

R5

18k

RsenseCurrent

R24

AverageCurrent

23
1

C15

100nF

L1

Out pin

14

16

15

NC

HEG17CSO

HVSU

PFC Mosfet Gate

R46

High Side Input

R16

1nF

630V

400V

1.2mH

Q3

100nF

C13

50V

12

13

11

NC

OUT

HSG

BOOT

L6382

10

C12

100nF

C11

47uF

35V

+

220.6W

220.6W

D13

STTH1L06A

1M

18

STP6NK60Z

2 1

J4

2/4