uba2015t/n1 NXP Semiconductors, uba2015t/n1 Datasheet - Page 6

• Manufacturer Part Number: uba2015t/n1
• Description: 600 V Fluorescent Lamp Driver With Pfc, Linear Dimming And Boost Function
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
UBA2016A_15_15A
Objective data sheet
7.1 Introduction
7.2 Power Factor Correction (PFC)
Table 3.
The UBA2016A/15/15A is an integrated circuit for electronically ballasted fluorescent
lamps. It provides a critical conduction mode Power Factor Correction (PFC)
controller/driver and a half-bridge controller/driver with all the necessary functions for
correct preheat, ignition and on-state operation of the lamp. Several protection
mechanisms are incorporated to ensure the safe operation of the fluorescent lamp or a
shut down of the complete ballast under any abnormal operating conditions or lamp
failure.
The PFC is a boundary conduction mode, on-time controlled system. The basic
application diagram can be found in
between continuous and discontinuous mode. Energy is stored in the inductor L
period that switch Q
Q
V
current I
I
triangular pulses, each having an amplitude proportional to the input voltage and t
If t
voltage. The PFC output voltage V
regulated than the mains frequency it will not disturb the power factor.
Symbol
BOOST
PH/EN
FBPFC
COMPPFC
AUXPFC
GPFC
GND
VDD
GLHB
SHHB
FSHB
GHHB
i(PFC)
i(PFC)
PFC
on(PFC)
. A new cycle is started when I
is switched on, the amplitude of the current build up in L
and the time t
o(PFC)
is kept constant, the first harmonic of the input current is proportional to the input
Pin description
Pin
10
10
11
12
13
14
15
16
17
18
19
20
via D
All information provided in this document is subject to legal disclaimers.
PFC
PFC
on(PFC)
Description
boost function input UBA2016A
preheat frequency setting combined with enable UBA2015 and UBA2015A
PFC feedback input
PFC output voltage feedback compensation
PFC auxiliary winding input
PFC gate driver output
ground
supply
HB low-side switch gate driver output
HB high-side source connection
HB floating supply connection
HB high-side switch gate driver output
into C
is on. When the input current I
Rev. 1 — 20 May 2011
…continued
that Q
BUS
after Q
PFC
o(PFC)
o(PFC)
Figure
is on. This current continues to flow as output
PFC
is controlled by t
reaches zero. I
6. This type of PFC operates at the boundary
is switched off. In this phase I
UBA2016A/15/15A
i(PFC)
on(PFC)
i(PFC)
600 V fluorescent lamp driver
is zero at the moment that
PFC
consists of a sequence of
. As t
will be proportional to
on(PFC)
© NXP B.V. 2011. All rights reserved.
o(PFC)
is more slowly
is equal to
PFC
on(PFC)
each
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.