UBA2017P/1,112 NXP Semiconductors, UBA2017P/1,112 Datasheet - Page 11

• Manufacturer Part Number: UBA2017P/1,112
• Description: Display Drivers & Controllers SMPS CTRLR 12.4V
• Manufacturer: NXP Semiconductors

Specifications of UBA2017P/1,112

• Rohs: yes
• Operating Supply Voltage: 12.4 V
• Mounting Style: Through Hole
• Package / Case: DIP-16
• Maximum Output Current: 105 mA
• Product: Fluorescent Lamp Driver
• Factory Pack Quantity: 25
• Supply Current: 2.2 mA

NXP Semiconductors
UBA2017
Product data sheet
7.3.7.1 Lamp current control and dimming
7.3.6 Auto-restart
7.3.7 Burn
If either saturation or overvoltage is triggered, it overrules the frequency sweep-down and
hold the frequency at the border where the fault appeared and start the fault timer. When
the fault time-out t
ignition attempt, otherwise it enters the Stop state; see
The Auto-restart state is entered after a fault time-out in the Ignition state during the first
ignition attempt. See
draws supply current I
until the voltage on this pin drops below V
Here the VDD capacitor is charged again to start a second ignition attempt. The bleeder
current must be between standby current I
between the two ignition attempts with the capacitor at pin VDD to reduce stress on the
HB components.
In the Burn state, the lamp current regulation and all protection circuits are active.
The AC lamp current is sensed by an external resistor connected to pin IFB. The resulting
AC voltage on pin IFB is internally Double-Side Rectified (DSR), and compared to a
reference level by an OTA. This reference level is determined by the internal reference
regulation level V
Figure 8 “Lamp current
Definition: the regulation voltage on pin IFB (V
to which the IC tries to regulate the average absolute voltage on pin IFB.
If the DIM input is not present or not connected or V
V
from OTA and DSR.
The DIM input controls the lamp current set point (UBA2017A only). The DIM input level is
internally clamped to V
on pin DIM I
DIM can be left open or connected via a capacitor to ground. The internal current source
I
bias(DIM)
reg(ref)
+ non-idealities from the OTA and the DSR else V
will then charge the pin until it is internally clamped to V
bias(DIM)
All information provided in this document is subject to legal disclaimers.
reg(ref)
to(fault)
and the external resistance on the pin. If no dimming is required, pin
Figure 6 “State
restart(VDD)
reg(ref)
and the voltage on the DIM input (UBA2017A only), as shown in
control”.
Rev. 2 — 15 May 2012
is reached the IC enters the Auto-restart state if it was the first
600 V fluorescent lamp driver with linear dimming function
. The lowest possible DIM input level is set by the bias current
. This slowly discharges the buffer capacitor on pin VDD
diagram”. When the IC is in the Auto-restart state, it
restart(VDD)
stb(VDD)
UBA2017/UBA2017A
reg(IFB)
and I
. The IC then enters the Standby state.
DIM
) is the level seen from outside the IC
restart(VDD)
Figure 6 “State
> V
reg(IFB)
reg(ref)
reg(ref)
. A time delay can be set
= V
then V
DIM
.
diagram”.
© NXP B.V. 2012. All rights reserved.
+ non-idealities
reg(IFB)
is
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