CCFL ballast driver IC
Description
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INTEGRATED CIRCUITS
DATA SHEET
UBA2070 600 V CCFL ballast driver IC
Product specification Supersedes data of 2001 Sep 27 2002 Oct 24
Philips Semiconductors
Product specification
600 V CCFL ballast driver IC
UBA2070
FEATURES • Current controlled operation • Adaptive non-overlap time control • Integrated high voltage level shift function • Power-down function • Protected against lamp failures or lamp removal • Capacitive mode protection.
APPLICATION • The circuit topology enables a broad range of backlight inverters.
ORDERING INFORMATION
GENERAL DESCRIPTION The UBA2070 is a high voltage integrated circuit for driving electronically ballasted Cold Cathode Fluorescent Lamps (CCFL) at mains voltages up to 277 V (RMS) (nominal value).
The circuit is made in a 650 V Bipolar CMOS DMOS (BCD) power logic process.
The UBA2070 provides the drive function for the two discrete MOSFETs.
Besides the drive function the UBA2070 also includes the level-shift circuit, the oscillator function, a lamp voltage monitor, a current control function, a timer function and protections.
PACKAGE TYPE NUMBER NAME UBA2070T UBA2070P SO16 DIP16 DESCRIPTION plastic small outline package; 16 leads; body width 3.
9 mm plastic dual in-line package; 16 leads (300 mil); long body VERSION SOT109-1 SOT38-1
2002 Oct 24
2
Philips Semiconductors
Product specification
600 V CCFL ballast driver IC
UBA2070
QUICK REFERENCE DATA SYMBOL High voltage supply Vhs Start-up state VDD(high) VDD(low) IDD(start) oscillator start voltage oscillator stop voltage start-up current VDD < VDD(high) IL = 10 µA 12.
4 8.
6 − 13 9.
1 170 13.
6 9.
6 200 V V µA high side supply voltage Ihs < 30 µA; t < 1 s − − 600 V PARAMETER CONDITION MIN.
TYP.
MAX.
UNIT
Reference voltage (pin VREF) Vref fbridge(max) fbridge(min) Isource Isink reference voltage 2.
86 2.
95 3.
04 V
Voltage controlled oscillator maximum bridge frequency minimum bridge frequency VGH − VSH = 0; VGL = 0 VGH − VSH = 13 V; VGL = 13 V 90 38.
9 100 40.
...
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