UM10412
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© NXP B.V. 2010. All rights reserved.
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
.
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
019aaa690
019aaa691
