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L6585D
PFC and Ballast Control IC
TARGET SPECIFICATION
Features
Pre-heating and ignition phases independently programmable Programmable and precise End-of-life protection compliant with all ballast configurations Half-bridge over-current control Ignition voltage control Automatic Re-lamp 1.25s dead time 3% Oscillator precision Transition mode PFC with over-current protection PFC over-voltage protection and feedback disconnection Under-voltage lock-out
SO-20

Applications
Electronic ballast
Block diagram
January 2006
Rev1
1/9
www.st.com 9
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
Contents
L6585D
Contents
1 2 3 4 5 Technical Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin Connections and Internal Schematic . . . . . . . . . . . . . . . . . . . . . . . . 4 Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2/9
Rev1
L6585D
Technical Overview
1
Technical Overview
The L6585 is a ballast control IC with integrated Power Factor Corrector (PFC), designed in High-voltage BCD Off-line technology. This one-chip solution replaces a half bridge controller, a PFC controller, the relevant drivers and the logic necessary to build an electronic ballast. The pre-heating and ignition durations are independently settable as well as the half-bridge switching frequencies for each operating phase (pre-heating, ignition and normal mode) to serve many different lamp types. Another outstanding feature is the capability of limiting the voltage applied to the lamp to a constant value during the ignition phase. The PFC section operates in Transition Mode. The highly linear multiplier includes a special circuit, able to reduce AC input current distortion, that allows wide-range-mains operation with an extremely low THD, even over a large load range. Some IC features, like the under voltage lock-out and the PFC over-voltage and feedback disconnection controls can assure lamp protection. Furthermore, a double threshold comparator on the half bridge current sense provides a sort of current control and avoids the MOSFETs working in the capacitive mode. A double threshold comparator on the PFC current sense prevents the inductor saturation. Other features like the automatic re-lamp for lamp replacing, the failure to strike and the End-Of-Life control, simplify the lamp management. The programmability of the EOL windows comparator thresholds makes the L6585 the only lighting IC compliant with either "lamp-to-ground" or "block capacitor-to-ground" configurations. The driver of the PFC is able to provide 120mA (source) and 250mA (sink) and the drivers of the half-bridge provide 170mA source and sink.
Rev1
3/9
Pin Connections and Internal Schematic
L6585D
2
Pin Connections and Internal Schematic
Figure 1. Pin connection (through top view)
OSC RF EOI TCH EOLP EOL-R CTR MULT COMP INV
BOOT HSD OUT VCC LSD GND HBCS PFG PFC CS ZCD
Figure 2.
Typical System Block Diagram
4/9
Rev1
L6585D
Mechanical Data
3
Mechanical Data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Rev1
5/9
Mechanical Data
L6585D
Table 1.
SO-20 Mechanical Data
Dimensions mm. inch Max. 2.65 0.1 0.2 2.45 0.35 0.23 0.5 45 (typ.) 12.60 10.00 1.27 11.43 7.40 0.50 7.60 1.27 0.75 8 (max.) 0.291 0.020 13.00 10.65 0.496 0.393 0.050 0.450 0.300 0.050 0.029 0.512 0.419 0.49 0.32 0.014 0.009 0.020 0.004 Min. Typ. Max. 0.104 0.008 0.096 0.019 0.012
Ref. Min. A a1 a2 b b1 C c1 D E e e3 F L M S Typ.
Figure 3.
Package Dimensions
6/9
Rev1
L6585D
Order codes
4
Order codes
Table 2. Order codes
Part Number L6585D L6585DTR Package SO-20 SO-20 Shipment Tube Tape and Reel
Rev1
7/9
Revision history
L6585D
5
Revision history
Table 3.
Date 12-Jan-2006
Document revision history
Revision 1 Initial release. Changes
8/9
Rev1
L6585D
Revision history
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
Rev1
9/9

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