UM10513
UBA2015AT Reference Design 120 V (AC)
Rev. 1.1 — 31 January 2012
User manual
Document information
Info
Keywords
Abstract
Content
UBA2015AT, dimmable, 2 × T5 35 W ballast
This document describes the UBA2015AT reference design for
120 V (AC). This dimmable design drives two 35 W T5 lamps. This user
manual describes the performances, technical data and wiring of the
reference design.
NXP Semiconductors
UM10513
UBA2015AT Reference Design 120 V (AC)
Revision history
Rev
v.1.1
v.1
Date
20120131
20111206
Description
second issue
first issue
Contact information
For more information, please visit:
http://www.nxp.com
For sales office addresses, please send an email to:
salesaddresses@nxp.com
UM10513
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.1 — 31 January 2012
2 of 26
NXP Semiconductors
UM10513
UBA2015AT Reference Design 120 V (AC)
1. Introduction
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.
The UBA2015AT reference design is intended to serve as a dimmable two lamp ballast
example. This document describes the specification and use of the UBA2015AT board.
This reference ballast design is intended to drive two T5 35 W lamps.
aaa-001136
a. top view.
b. bottom view.
Fig 1.
Photograph of the UBA2015AT reference design
2. Safety warning
Connected the board to the mains voltage. Avoid touching the board while it is connected
to the mains voltage. An isolated housing is obligatory when used in uncontrolled,
non-laboratory environments. Galvanic isolation of the mains phase using a variable
transformer is always recommended.
019aab173
019aab174
a. Isolated
Fig 2.
Variac isolation symbols
b. Not isolated
UM10513
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.1 — 31 January 2012
3 of 26
NXP Semiconductors
UM10513
UBA2015AT Reference Design 120 V (AC)
3. Specifications
Table 1.
Parameter
ballast type
starting method
starting time
lamp terminals
line voltage
line frequency
lamp type
number of lamps
dimming interface
transient protection
Table 2.
Lamp type
Ballast performance
Number
of lamps
2
Lamp
power
(W)
35
Maximum Power
THD (%)
factor
10
> 0.99
I
lamp
maximum
crest factor
1.7
nominal minimum
(A)
(mA)
0.17
5
Specifications for the reference board
Comment
electronic
programmed start with preheat
<1s
7
120 V (AC)
50 Hz/60 Hz
T5 35 W
2
1 V to 10 V
complies with IEC 61547
T5 35 W
chassis, pin 1 (green/yellow)
line, pin 2 (brown)
neutral, pin 3 (blue)
X1
DIM+, pin 4 (violet)
DIM-, pin 5 (grey)
REFERENCE DESIGN
pin 1
pin 2
pin 3
pin 4
X3
pin 5
pin 6
pin 7
MH1
LAMP
LAMP
aaa-001137
Fig 3.
Wiring diagram
Remark:
Connected the ballast as shown in
Figure 3.
When no dimming is needed, do
not connect (floating) the dim input.
Remark:
The chassis connection must connect to the earth using mounting hole MH1.
UM10513
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.1 — 31 January 2012
4 of 26
NXP Semiconductors
UM10513
UBA2015AT Reference Design 120 V (AC)
3.1 Dimming without using an external voltage source
The ballast is dimmed with a voltage source of 1 V (DC) to 10 V (DC) connected to
connector X1.
It is also possible to dim with an external logarithmic potentiometer of 470 k (for
example, no external voltage supply is available). The potentiometer must connect to pin
5 (gray wire, DIM) and pin 4 (violet wire, DIM+) of connector X1.
4. Performance data
4.1 Efficiency, power factor and THD
1.0
THD
PF
0.8
(1)
aaa-001138
80
Pin
(W)
78
0.6
(2)
76
0.4
74
0.2
(3)
72
0
90
110
70
130
150
AC mains voltage (V)
(1) Power factor.
(2) Input power.
(3) Current THD.
Fig 4.
THD, power factor and input power as function of mains input voltage
UM10513
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.1 — 31 January 2012
5 of 26
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