UBA2014T/N1,518 NXP Semiconductors, UBA2014T/N1,518 Datasheet - Page 7

• Manufacturer Part Number: UBA2014T/N1,518
• Description: IC CNTL BALLAST 600V 16-SOIC
• Manufacturer: NXP Semiconductors
• Type: Ballast Controllerr

Specifications of UBA2014T/N1,518

• Package / Case: 16-SOIC (3.9mm Width)
• Frequency: 40.5 ~ 100 kHz
• Current - Supply: 1.5mA
• Current - Output: 330mA
• Voltage - Supply: 9.1 V ~ 13 V
• Operating Temperature: -25°C ~ 80°C
• Driver Type: CCFL, HFTL Drivers
• Maximum Operating Temperature: + 80 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-3322-2; 935270228518; UBA2014TD-T

NXP Semiconductors
UBA2014_4
Product data sheet
8.10 Capacitive mode protection
8.11 Charge coupling
8.12 Design equations
8.9 Power-down mode
The Power-down mode will be entered if, at the end of the ignition time, the voltage at
pin LVS is above V
both TR1 and TR2 will be non-conductive. The V
circuit is released from the Power-down mode by lowering the low-voltage supply below
V
The signal across R16 also gives information about the switching behavior of the half
bridge. If, after the preheat state, the voltage across the ACM resistor (R16) does not
exceed the V
circuit assumes that the circuit is in the capacitive mode of operation. As a consequence
the frequency will directly be increased to f
the voltage at pin CSW until C
Due to parasitic capacitive coupling to the high voltage circuitry all pins are burdened with
a repetitive charge injection. Given the typical application the pins IREF and CF are
sensitive to this charge injection. For charge coupling of approximately 8 pC, a safe
functional operation of the IC is guaranteed, independent of the current level.
Charge coupling at current levels below 50 A will not interfere with the accuracy of the
V
Charge coupling at current levels below 20 A will not interfere with the accuracy of any
parameter.
The following design equations are used to calculate the desired preheat time, the
maximum ignition time, and the minimum and the maximum switching frequency.
Start of ignition is defined as the moment at which the measured lamp voltage crosses the
V
t
t
f
f
ign
ph
DD(reset)
CS
min
max
lamp(fail)
, V
=
=
=
=
1.8
PCS
0.26
40.5 10
2.5
.
level; see
and V
------------------------- -
330 10
CMD
------------------------- -
330 10
f
C
min
CT
C
ACM
3
level during the non-overlap time, the Capacitive Mode Detection (CMD)
CT
lamp(fail)
Section
9 –
100 10
--------------------------- -
levels.
9 –
Rev. 04 — 16 October 2008
C
------------------- -
33 10
CF
R
. In the Power-down mode the oscillator will be stopped and
------------------- -
33 10
IREF
R
8.8.
–
IREF
12
CSW
3
3
33 10
------------------- -
R
has been discharged to zero.
IREF
3
max
. The frequency behavior is decoupled from
600 V driver IV for HF fluorescent lamps
DD
supply is internally clamped. The
UBA2014
© NXP B.V. 2008. All rights reserved.
7 of 19
(1)
(2)
(3)
(4)