NXP Semiconductors UM10388 User manual

UM10388
UBA2024AP DIP8 18 W demo board
Rev. 3 — 27 January 2011 User manual
Document information
Info Content
Keywords UBA2024AP, half-bridge CFL driver, non-dimmable
Abstract This document describes the correct use of the UBA2024AP half-bridge
CFL driver demo boards for both 120 V and 230 V mains voltages and
some circuit examples for up to 18 W

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 2 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
Revision history
Rev Date Description
v.3 20110127 third issue
v.2 20100407 second issue
v.1 20091001 first issue

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 3 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
1. Introduction
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.
1.1 General description
The UBA2024AP circuit is a half-bridge driver IC, which has been set-up to drive a
standard PLC-18W, G24q-2 socket based lamp or similar lamp types with a nominal lamp
power of 16.5 W. The total power drawn from the mains is about 18 W at a nominal mains
voltage of 230 V (RMS); 50 Hz or 120 V (RMS); 60 Hz. The board can easily be
configured to drive different Compact Fluorescent Lamps (CFL) of different power ratings
as some design examples will show by changing the inductor tap and applying a different
lamp capacitor. The UBA2024AT demo board is not recommended for driving lower
voltage linear lighting lamps like the T5 or the T8. The UBA2021 is the optimal option for
these type of lamps. The IC is able to drive lamps up to 22 W provided the maximum
junction temperature of the IC is not exceeded. There are no THD requirements for mains
power lower than 25 W, so a pre-conditioning function is obsolete.
The circuit is set-up to perform a quasi preheat so the lamp will turn on approximately
0.7 s after the mains voltage has been applied to the board. For detailed design steps on
the 18 W lamp solution or how to set-up lamps with other power ratings please consult the
application note AN10713 “18 W CFL lamp design using UBA2024 application
development tool and application examples”.
The mains voltage operating range is either set for 90 V to 130 V (RMS) or
200 V to 250 V (RMS), depending on the ordered board. Both voltage range strappings
have been incorporated in one layout of the board. This makes easier to set-up the same
board with a different voltage range.
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
019aaa690
019aaa691

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 4 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
The IC is not equipped with a thermal protection or open lamp detection because the IC is
intended as a cost-effective solution to drive CFLs with an integrated ballast (CFLi). The
demo board has been set-up around a detachable lamp, so a protection circuit has been
added to the board that will set the IC to a safe mode of operation when there is no lamp
attached to the circuit. This circuit is not needed in a typical CFL application.
Remark: If the UBA2024AP is used in a non-integrated ballast or a 'matchbox' type of
ballast, the protection circuit is required.

xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx
xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x
UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. User manual Rev. 3 — 27 January 2011 5 of 16 NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
2. Schematic diagram
Fig 2. Schematic diagram
K1
W1
W4 C1
C2
C3
C4
W5
W6
W7
W2
W3
1
2
3
2
1
MKDS 1,5/2
K2
MKDS 1,5/2
2
1
K3
D1
RFUS(1)
CBUF1(1) CHB1
100 nF
400 V
CHB2
100 nF
400 V
LFILT
LLA
WE-Bobbin EF20 CFS
10 nF
nmnm
J1
222
111
6543
J2 J3
CDV
220 pF
500 V
CSW
220 nF CVDD 10 nF Cosc 100 pF
Rosc
200 kΩ
R8
0 Ω
1.5 mH
CBUF2(1)
D2
D4 D3
MKDS 1,5/2 CLA
2.2 nF
1000 V
110 V (AC) K1-pin 2-pin 1
230 V (AC) K1-pin 2-pin 3
1N4007 1N4007
(1)
1N4007 1N4007
(1)
7
8
1
2
4
5
3
6V
DD
RC
V
DD
RC
SW
SGND
HV
U1
FS
OUT
UBA2024AP
PGND
GND
019aab382
lamp inductor selection
(1)
NOTE! design combines 110V (AC) and 230V (AC)
120 V (AC):
RFUS = 6.8 Ω/1 W
CBUF1, CBUF2 = 22 μF/200 V
D2 and D3 NOT mounted
K1 mounted on position 1, 2
J1, J2, J3 are 0 Ωresistor jumpers
J1 = 2.1 mH, default set for 18 W
J2 = 2.7 mH
J3 = 3.1 mH
DO NOT short more than one jumper
at the same time.
230 V (AC):
RFUS = 10 Ω/1 W
CBUF1 =10 μF/400 V
CBUF2 =wire bridge
D1 to D4 are all mounted 1N4007
K1 mounted on position 2, 3
R3
220 kΩ
T1-2
BC847BPN
D5
BAV70W
C12
220 pF
R5
180 kΩ
R4
33 kΩ
C11
3.3 μF
4
1
6
1
2
332
5
R6
1 MΩ1 MΩ
R7
V
DD
RC
GND
OPTIONAL "LAMP DETECTION CIRCUIT"
T1-1
BC847BPN

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 6 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
3. Specification
The UBA2024AP demo board is set-up to drive an 18 W burner with a G24q-2 type of
socket. The specifications for this setup are:
230 V (AC):
•Input voltage range: 230 V (AC); 15 %; 50 Hz
•Input power: 18 W at 230 V (AC)
•Input current: 145 mA at 230 V (AC)
•Power factor: 0.54
•Running frequency 44 kHz; start frequency 110 kHz
•700 ms quasi preheat
120 V (AC):
•Input voltage range: 120 V (AC); 15 %; 60 Hz
•Input power: 18 W at 120 V (AC)
•Input current: 255 mA at 120 V (AC)
•Power factor: 0.59
•Running frequency 44 kHz; start frequency 110 kHz
•700 ms quasi preheat
Protections:
•No load and lamp removal protection by means of external protection circuit
Fig 3. UBA2024AP 230 V (AC) mains demo board Fig 4. UBA2024AP 120 V (AC) mains demo board
019aab383
019aab384

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 7 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
Burners:
•Osram Dulux D/E 18 W; 4-pin; G24q-2
•Philips PL-C 18 W; 4-pin; G24q-2
•General Electric F18DBX ECO 4P; G24q-2
Other burners that are electrically suitable and safe to use are the following:
•Osram Dulux T/E 18 W; 4-pin; Gx24q-2
•Philips PL-T 18 W; 4-pin; Gx24q-2
•General Electric F18TBX ECO 4P; GX24q-2
•All T2 or T3 16.5 W burners with 80 V lamp voltage and 210 mA lamp current
3.1 Board connections
The connection to the lamp is very straight forward as the Figure 5 and Figure 6 show.
The board has been designed to accommodate layouts for 120 V (AC) or 230 V (AC) line
voltages. An ordered board is preset for a certain line voltage. The labeling on the board
for the mains voltage connector has been designed in such a way that the correct line
voltage label becomes visible when the two way screw terminal block for the mains
voltage is soldered to the proper position.
When a board for a specific line voltage is ordered, the customer is free to set it up for a
different line voltage. Make sure that the position of the two way screw terminal block is
changed accordingly, so the correct mains voltage label becomes visible.
Fig 5. Connecting the 230 V (AC) mains demo board
CFL
K1
W2
2
W3
W1 1
D2 C1 C2
3
D3
W7
W6
T2
L1R1
D4
D1
+
+
W5
W4
U1
C4
C3C2
C1
C4 C3
4
3
6
1
C10
111
K3
230 V AC
K2
230 V (AC)
019aab385

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 8 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
3.2 Lamp inductor selection
The inductor supplied with this board has been made to accommodate three inductors in
one. This makes setting up the board for different lamp powers easier, since it is much
easier to change the lamp capacitor than the lamp inductor. It also speeds up the design
time (see Section 5 and the application note AN10713).
Figure 5 shows how to select a different lamp inductor. The inductor can be set for 2.1 mH
(default setting on delivery for the 18 W lamp), 2.7 mH, and 3.1 mH, The saturation
current for the 2.1 mH inductor setting is 1.1 A at 125 C ambient.
Remark: Only short one jumper, otherwise the inductor windings become shorted.
Fig 6. Connecting the 120 V (AC) mains demo board
CFL
W2
2
W3
W1 1
D2 C1 C2
3
D3
W7
W6
T2
L1R1
D4
D1
+
+
W5
W4
U1
C4
C3C2
C1
C4 C3
4
3
6
1
C10
11
K3K2
K1
1
110 V AC
110-120 V (AC)
019aab386
Fig 7. Selecting the lamp inductor by resistor programming on the bottom side of the
board
019aab387
signal bottom side
default setting
3322-029-91201
3.1 mH
2.7 mH
2.1 mH

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 9 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
3.3 Bill of material 18 W lamp
Table 1. 18 W lamp (16.5 W; 145 mA burner; requiring warm ignition; fO=45kHz)
Reference Description Remarks 115 V; 60 Hz 230 V; 50 Hz
RFUS fusible inrush current
limiter resistor special type, fusible, high peak power 6.8 10 
D1, D2 voltage doubler diodes 1N4007
D1, D4 bridge rectifier diodes 1N4007
CBUF1, CBUF2 buffer capacitors high temperature electrolytic type 22 F; 200 V
CBUF1 buffer capacitor high temperature electrolytic type 10 F; 400 V
LFILT filter inductor axial type 1.5 mH; 300 mA 1.5 mH; 300 mA
CHB1, CHB1 half-bridge capacitors 100 nF; 400 V 100 nF; 400 V
CLA lamp capacitor high voltage polypropylene film
type capable of withstanding peak
voltages
2.2nF;800V 2.2nF;800V
LLA lamp inductor E20 core for lamp powers up to
23 W; Würth electronic type:
760370084 (see Section 6);
J1 = closed; J2 = open; J3 = open
2.1 mH 2.1 mH
CDV dV/dt limiting capacitor 220 pF; 500 V 220 pF; 500 V
CFS floating supply buffer
capacitor SMD: X7R type; leaded: PET type, high temperature 10 nF; 50 V 10 nF; 50 V
CVDD lowvoltage supply buffer
capacitor SMD: X7R type; leaded: PET type, high temperature 10 nF; 50 V 10 nF; 50 V
COSC oscillator capacitor SMD: NP0 type; leaded: C0G type,
preferably high accuracy value
type
100pF;50V;2% 100pF;50V;2%
ROSC oscillator resistor preferably E96 series high
accuracy value type 200 k;1/8W;1% 200k;1/8W;1%
CSW sweep time capacitor SMD: X7R type; leaded: PET type,
high temperature 220 nF; 50 V 220 nF; 50 V
U1 CFL half-bridge driver IC NXP ordering code:
9352 888 01112 UBA2024AP UBA2024AP
Table 2. Components values for the optional lamp detection circuit
Reference Description Remarks Value
R3 resistor preferably E24 series high accuracy value type 220 k; 0.125 W; 1 %
R4 resistor preferably E24 high accuracy value type 33 k; 0.125 W; 1 %
R5 resistor 180 k; 0.125 W
R6, R7 resistor 1M; 0.125 W
C11 ignition time-out capacitor MLCC X7R type with a voltage rating 10 V 3.3 F; 10 V
C12 capacitor ceramic or MLCC N0P or leaded C0G type 220 pF; 16 V
D5 double diode common cathode

UM10388 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
User manual Rev. 3 — 27 January 2011 10 of 16
NXP Semiconductors UM10388
UBA2024AP DIP8 18 W demo board
4. Conduction emissions test
Conducted emissions have been measured in neutral and line wires using a
pre-compliance test setup, considering the limits for lighting applications, i.e. EN55015.
The measurements have been performed at 230 V (AC) line voltage. The results are
shown in Figure 8 and Figure 9. The emission level is below both the quasi peak and the
average limits with an acceptable margin.
The measurements taken are only valid for this particular board design. The board layout
can be used as a guide to set-up the actual design, but there is no absolute guarantee
that the final product will pass the conducted EMI test. The board shown is only part of a
total product (including housing and wiring) that needs to pass.
Q1-1, Q2-2 PNP/NPN transistor in one
package or use separate
transistors.
hfe > 100 at 10 ABC847BNP
Q1-1 hfe > 100 at 10 ABC847B
Q2-2 hfe > 100 at 10 ABC857B
Table 2. Components values for the optional lamp detection circuit
Reference Description Remarks Value
Fig 8. Conducted EMI 230 V; 50 Hz, in line, quasi peak (QP blue trace) and average
(AV black trace)
019aab388