NXP Semiconductors UBA2021 User manual

UM10412

UBA2021 evaluation board

Rev. 1 — 2 November 2010 User manual

Document information

Info Content

Keywords UBA2021, evaluation board, TL, CFL

Abstract This document is the user manual for the UBA2021 evaluation board.

User manual Rev. 1 — 2 November 2010 2 of 26

Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: [email protected]

NXP Semiconductors UM10412

UBA2021 evaluation board

Revision history

Rev Date Description

01 20101102 First issue

User manual Rev. 1 — 2 November 2010 3 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

1. Introduction

This document describes the UBA2021 main board in combination with the UBA2021

daughter board. The main board is designed to be a flexible platform for demonstrating

the functionality of the UBA2014 and UBA2021 fluorescent tube drivers in different

applications. Please note that this board is not a complete ballast design for fluorescent

tubes. The default setup permits a T5 HE 35 W fluorescent lamp to be demonstrated.

2. Safety warnings and cautions

Remark: Galvanic isolation of the mains phase using a variable transformer is always

recommended. These devices can be recognized by the symbols shown in Figure 1.

The board is intended as an evaluation board to build different TL and or CFL

applications. To optimize flexibility, almost no protection is build in (except for IC internal

protection). The board does not conform with any safety norm.

CAUTIONS:

•Do not supply voltages to the board without a daughter board correctly inserted.

Failing to do so may damage the board.

•Always operate with burner (lamp) connected to the board and connected to the

resonant circuit. Failing to do so may damage the board.

•Do not use the UBA2021 daughter board in combination with the (old) V1.1 main

board. The V1.1 board is blue instead of green.

WARNING

Lethal voltage and fire ignition hazard

The non-insulated high voltages that are present when operating this product, constitute a

risk of electric shock, personal injury, death and/or ignition of fire.

This product is intended for evaluation purposes only. It shall be operated in a designated test

area by personnel qualified according to local requirements and labor laws to work with

non-insulated mains voltages and high-voltage circuits. This product shall never be operated

unattended.

a. Isolated b. Not isolated

Fig 1. Variac isolation symbols

019aaa69

User manual Rev. 1 — 2 November 2010 4 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

3. Board description

The board consists of two separate PCBs. The main board with the resonance circuit and

a small daughter board with the UBA2021 IC.

3.1 Daughter board

The daughter board contains the UBA2021 IC with the preheat, sweep and oscillator

capacitors, the low voltage supply (VDD) components and some other low voltage

components.

The daughter PCB can easily be replaced if it becomes damaged. Care should be taken

that the board is inserted properly and to assist this, pin 11 has been removed from the

daughter board to prevent inserting the board incorrectly.

3.2 Main board

The main board has been designed for both TL or CFL applications and comprises the

following:

•DC and AC input connectors

•Dimming input

•Two sockets for FETs

•Two different transformers

•Area for experiments

•Connectors for up to four burners

Fig 2. Daughter board

019aaa28

User manual Rev. 1 — 2 November 2010 5 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

Fig 3. UBA2014/21 Main board with UBA2021 daughter board inserted

019aaa28

User manual Rev. 1 — 2 November 2010 6 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

4. Schematics

Figure 4 is a schematic of the daughter board with the UBA2021 IC. The component

values for the oscillator and sweep are RREF = 30 kΩ, CF = 100 pF, CP = 330 nF. These

values will give a minimum oscillator frequency of 39.5 kHz and a preheat time of 1.85 s.

Fig 4. Daughter board with UBA2021 circuit

019aaa28

30 kΩ

C1 A1

100 nF

330 nF/16 V

100 pF

47 Ω

150 kΩ

160 kΩ

2CI

114 RHV Vbrg

470 pF/

500 V

100 nF

BAS29

1 nF/

100 V

1 μF/

25 V

10 nF/

50 V

Pin 11 is cut off

for correct insertion

header 13

C10

2.2 nF/

100 V

1 kΩ

10 kΩ

BC847C

BC857C

3.3 kΩ

DNP

UBA2021P

2G1 GH

3S1

PCS_2021

1FS

6G2 GL

4n.c.

5VS VDD

7PGND

CP 8

CF 12

RREF 10

SGND 11

RS 9

PCS_2021

Vbrg

xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x

xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx

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User manual Rev. 1 — 2 November 2010 7 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

Fig 5. Main board half-bridge and resonance circuit - version R1C

019aaa28

43 kΩ

R22

0 Ω

1X90 TP

1X92 TP

1X94 TP

1X96 TP

X78 TP

0 Ω

43 kΩ

R23

5.6 kΩ

R38

0 Ω

R39

1.2 kΩ

R37

LVS 2

47 kΩ

R24

Cdc 68 nF/400 V

33 nF/100 V

760 870 401

X114

header 2

X115

header 2

socket 3

33 nF/100 V

47 kΩ

R25

placed in header

2SK3569

placed in header

2SK3569

jumper

4.7 nF

2000 V

C19

470 nF

63 V

CSN

123

C17

680 nF

50 V

C12

1 nF

100 V

C11

10 nF

100 V

C18

2.2 nF

100 V

R36

56 kΩ

R35

56 kΩ

R10

33 Ω

2 W

1 Ω

2 W

1 Ω

2 W

1 Ω

2 W

R32

100 kΩ

R31

1 kΩ

V16

1N4937

V12

1N4937

V11

1N4937

jumper

Y10

jumper

PCS_2021

PCS

LCS

lamp current sense circuit

33 Ω

8.2 kΩ

1 kΩ

220 kΩ

R20

VDC

Vbrg

1X14

socket 3

1CSN

connection for daughterboard

ground connections for

oscilloscope probes

1X89

socket 13

header 2

X34

jumper

header 2

X32

1X39

header 3

X33

header 3

X79 TP 2CSP1

X80 TP 3Vref1

X81 TP 4LVS1

X82 TP 5SH1

X83 TP 6GH1

X84 TP 7PCS1

X85 TP 8Vbrg1

X86 TP 9GL1

X87 TP 101

X104

X88 TP 12VDD

connector position 11

glued sealed to prevent

erroneous insertion of

daughterboard

X120 TP 13PCS_20211

X105

X106

X107

X102

X108

X103

X109

User manual Rev. 1 — 2 November 2010 8 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

Fig 6. Main board input section

019aaa28

R27

75 kΩ

C16

47 μF/

350 V

1N4937

1.5 mH

Fuseholder 5x20

F2 Y12

Cover

MKDS 2.5/2-5.08

GBU8K

C15

47 μF/

350 V

VDC

R33

75 kΩ

R29

75 kΩ

R34

75 kΩ

47 nF/

305 Vac

47 nF/

305 Vac

VAC In = 230 V 50 Hz

VDC In = 400 V

MKDS 2.5/2-5.08

Fig 7. Main board dimming input (only in combination with UBA2014 daughter board)

019aaa28

R19

11 kΩ

33 kΩ

V15

DNP

C14

10 nF/

100 V

R18

75 kΩ

R40

X68

MKDS 2.5/2-5.08

External

dimming voltage

0 V to 10 V

VDD

CSP

Fig 8. Main board transformer T2/T3

019aaa30

10 X70 TP

X67 X70

9X72 TP

X72

8X74 TP

X74

7X76 TP

X76

X67 TP

2X69

X69 TP

3X73

X73 TP

4X75

X75 TP

5X77

2 mH

DNP

15 μH

2.5 mH

3 mH

3.5 mH

4 mH

X77 TP

6X91

X91 TP

X117

header 2

Y11

jumper

User manual Rev. 1 — 2 November 2010 9 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

Fig 9. Main board lamp connectors and experimental area

019aaa2

X110

header 2

X111

header 2

X112

header 2

X113

header 2

LAMP 4

EXPERIMENTING AREAEXPERIMENTING AREA

MKDS 2.2/4-5.08

X6 TP

jumper

X9 TP

X11 TP

X13 TP

X21

LAMP 3

MKDS 2.2/4-5.08

X20 TP

X24 TP

X27 TP

X30 TP

X42

LAMP 2

MKDS 2.2/4-5.08

X38 TP

X41 TP

X46 TP

X49 TP

X56

LAMP 1

MKDS 2.2/4-5.08

X55 TP

X59 TP

X62 TP

X65 TP

1X90 TP

1X92 TP

1X94 TP

1X96 TP

1X19 TP

X17 TP

1X23 TP

1X26 TP

1X29 TP

X31 TP

X18 TP

X22 TP

X25 TP

X28 TP

X15 TP

1X37 TP

X35 TP

1X40 TP

1X45 TP

1X48 TP

X50 TP

X36 TP

X43 TP

X44 TP

X47 TP

1X54 TP

X52 TP

1X58 TP

1X61 TP

1X64 TP

X66 TP

X53 TP

X57 TP

X60 TP

X63 TP

User manual Rev. 1 — 2 November 2010 10 of 26

NXP Semiconductors UM10412

UBA2021 evaluation board

5. Connectors

5.1 Power supply connectors

The board can be supplied by either a high voltage DC or a mains AC input. For most

applications the high voltage DC input should be used. In the final product, a PFC of

choice may be used to replace the high voltage DC supply.

For some applications (such as CFL applications) the rectified mains is sufficient. In these

cases a mains input of 230 VAC may be used.

5.2 Dimming input

The UBA2021 does not have dimming functionality so this input is not used. If dimming is

required, please use the UBA2014.

5.3 Lamp connectors

There are four lamp connectors on the board. The connectors are listed in Table 3,

Table 4, Table 5 and Table 6, together with the names of the test points that are connected

to them.

Table 1. DC high voltage input connector X1

Connector Signal Comment

X1-1 + + 400 V DC in

X1-2 GND Ground

Table 2. AC input connector X3

Connector Signal Comment

X3-1 ~ Mains 230 V AC

X3-2 ~ Mains 230 V AC

Table 3. Lamp 1 (X56)

TP Comment

X55 connection for filament 1

X59 connection for filament 1

X62 connection for filament 2

X65 connection for filament 2

Table 4. Lamp 2 (X42)

TP Comment

X38 connection for filament 1

X41 connection for filament 1

X46 connection for filament 2

X49 connection for filament 2

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