UBA2013L Datasheet PDF - Philips
Part Number | UBA2013L | |
Description | HB driver IC | |
Manufacturers | Philips | |
Logo | ||
There is a preview and UBA2013L download ( pdf file ) link at the bottom of this page. Total 22 Pages |
Preview 1 page No Preview Available ! UBA2013/L3
HB driver IC with PFC for fluorescent rings
Rev. 00.01 — 23 February 2007
Preliminary data sheet
1. General description
The UBA2013/L3 is a high voltage IC intended to drive and control fluorescent lamps. The
IC can handle both cold and warm ignition of the lamp. It contains a TON-controlled PFC
function, a half bridge controller circuit with level shifter and an internal bootstrap diode to
drive an external half bridge. UBA2013/L3 also offers a functionality to properly handle
fault conditions such as capacitive mode switching, end-of-lamp-life and overcurrent.
UBA2013/L3 is designed for wide-input mains voltage (120 V - 277 V) applications.
2. Features
2.1 Half bridge
Suitable for cold and warm ignition
Adjustable preheat time
Adjustable ignition voltage
Integrated bootstrap function
Protection for lamp failure and
end-of-life
Adjustable preheat current
Single ignition attempt
Automatic restart after relamping
Protection for capacitive mode
2.2 PFC
Three pin PFC controller using TON
control
Critical mode operation
Overvoltage/overcurrent protection
3. Applications
The UBA2013/L3 can provide the drive and control function for a wide range of half bridge
based ballast applications at different mains voltages.
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
UBA2013T
SO16
plastic small outline package; 16 leads; body width 3.9mm
Version
SOT109-1
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7.4 Preheat state
The circuit starts oscillating at the half-bridge frequency fstart (approximately 2.5 x fB). The
frequency gradually decreases until a user-defined value of the preheat current is
reached. The slope of the decrease in frequency is determined by the capacitor at the CI
pin. During preheat, the circuit monitors the inductor current by measuring the voltage
across external resistor RS at the end of the conduction of T2 with decision level VRS(ph).
The frequency is decreased for as long as VRS < VRS(ph). The frequency is increased for
VRS > VRS(ph). During preheat the STOP pin is discharged to ground via a switch with an
on resistance of RSTOP(disch). The cycle-by-cycle excess charge control mechanism
described in the ignition state is not active during the preheat state. The preheat time is
determined by capacitor CP. For cold ignition the preheat time can be reduced by
choosing a smaller CP capacitor. The circuit can be locked in the preheat state by
connecting pin CP to ground.
7.5 Ignition state
After the preheat time the ignition state is entered and the frequency will sweep down due
to charging of the capacitor at the CI pin with the internally fixed current ICI(charge). During
this decrease in frequency, the circuit approaches the resonance frequency of the load.
This will cause a high voltage across the load, which normally ignites the lamp.
In order to limit voltages and currents in the resonant circuit in case of non- or delayed
ignition, a cycle-by-cycle excess charge control mechanism is used to prevent deep
saturation and to limit the lamp voltage. When the voltage at pin RS exceeds VRS(clamp)
the impedance of the pin changes from essentially infinite to essentially zero. If a current
is flowing into pin RS during the on-state of T2, a fraction kIsat of that current will be fed
into the capacitor CCF at pin CF in addition to the oscillator current already flowing into
CCF. The amount of current fed into CCF depends on the voltage across RS and the value
of resistor R, see Figure 4. The increased current rapidly (but not instantly) ends the
oscillator half-cycle, after which T2 is switched off. The on-time of T1 is not affected and
thus the half bridge will run asymmetrically, see Figure 4.
Free Datasheet http://www.datasheet4u.com/
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for UBA2013L electronic component. |
Information | Total 22 Pages | |
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