IC PFC/BALLAST CONTROL 20-SOIC

L6585DETR

Manufacturer Part NumberL6585DETR
DescriptionIC PFC/BALLAST CONTROL 20-SOIC
ManufacturerSTMicroelectronics
TypePFC/Ballast Controller
L6585DETR datasheet
 


Specifications of L6585DETR

Frequency58.4 ~ 62 kHzCurrent - Supply7mA
Current - Output600mAVoltage - Supply11 V ~ 16 V
Operating Temperature-40°C ~ 150°CPackage / Case20-SOIC (7.5mm Width)
Switching Frequency250 KHzMaximum Power Dissipation830 mW
Maximum Operating Temperature+ 150 CMounting StyleSMD/SMT
Minimum Operating Temperature- 40 CLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-8822-2  
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Features
PFC section
– transition mode PFC with over-current
protection
– over-voltage protection
– feedback disconnection
– under-voltage lockout
– PFC choke saturation detection
– THD optimizer
Half-bridge section
– preheating and ignition phases
independently programmable
– 3 % oscillator precision
– 1.2 µs dead time
Figure 1.
Block diagram
April 2009
Combo IC for PFC and ballast control
– programmable and precise end-of-life
protection compliant with all ballast
configurations
– smart hard switching detection
– fast ignition voltage control with choke
saturation detection
– half-bridge over-current control
Rev 2
L6585DE
SO-20
1/33
www.st.com
33

L6585DETR Summary of contents

  • Page 1

    Features ■ PFC section – transition mode PFC with over-current protection – over-voltage protection – feedback disconnection – under-voltage lockout – PFC choke saturation detection – THD optimizer ■ Half-bridge section – preheating and ignition phases independently programmable – 3 ...

  • Page 2

    Contents Contents 1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    L6585DE 6.8 Choke saturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 4

    Pin settings 1 Pin settings 1.1 Connection Figure 2. Pin connection (top view) 1.2 Functions Table 1. Pin functions Pin n. Name 1 OSC EOI 4/33 An external capacitor to ground fixes the half-bridge switching frequency with ...

  • Page 5

    L6585DE Table 1. Pin functions (continued) Pin n. Name 4 Tch 5 EOLP 6 EOL 7 CTR 8 MULT 9 COMP 10 INV 11 ZCD 12 PFCCS Pin for setting the preheating time and protection intervention. Connect an RC parallel ...

  • Page 6

    Pin settings Table 1. Pin functions (continued) Pin n. Name 13 PFG 14 HBCS 15 GND 16 LSD 17 VCC 18 OUT 19 HSD 20 BOOT 6/33 PFC gate driver output. The totem pole output stage is able to drive ...

  • Page 7

    L6585DE 2 Electrical data 2.1 Maximum ratings Table 2. Absolute maximum ratings Symbol Pin V 20 BOOT V 18 OUT dV /dt 18 OUT 10 EOL V 7 ...

  • Page 8

    Electrical characteristics 3 Electrical characteristics ° Table 4. Electrical characteristics Symbol Pin Supply voltage Vcc V Operating range Turn-on threshold CC(on Turn-off threshold CC(OFF) ...

  • Page 9

    L6585DE Table 4. Electrical characteristics (continued) Symbol Pin CTR pin Shutdown threshold DIS CTR Hysteresis Dynamic PFC over- voltage PFOV CTR Hysteresis Available range as CTR tracking reference PFC section – current sense comparator I PFCS Input bias current CS ...

  • Page 10

    Electrical characteristics Table 4. Electrical characteristics (continued) Symbol Pin Half bridge section – timing and oscillator I T Charge current CH CH Charge threshold V T CHP CH (positive going-edge) Discharge threshold V T CHN CH (negative going edge) T ...

  • Page 11

    L6585DE Table 4. Electrical characteristics (continued) Symbol Pin V EOL Half window amplitude W EOL Sink/source capability Half bridge section – Half-bridge current sense HBCS HBCS Frequency increase H HBCS HBCS Threshold L HBCS HBCS Shut down threshold H,test during ...

  • Page 12

    Electrical characteristics Table 4. Electrical characteristics (continued) Symbol Pin T HSD Rise time RISE T HSD Fall time FALL HSD HSD-OUT pull-down High-side floating gate-drive supply BOOT Leakage current OUT Leakage current Synchronous bootstrap diode on-resistance 1. Parameter in tracking ...

  • Page 13

    L6585DE 4 Device description The L6585DE embeds a high performance PFC controller, a ballast controller and all the relevant drivers necessary to build an electronic ballast. The PFC section achieves current mode control operating in transition mode, offering a highly ...

  • Page 14

    Application information 5 Application information Figure 3. Typical application 5.1 VCC section The L6585DE is supplied by applying voltage between the V voltage lockout (UVLO) prevents the IC from operating with supply voltages too low to guarantee the correct behavior ...

  • Page 15

    L6585DE 5.2 PFC section 5.2.1 TM PFC operation The PFC stage contains all the features needed to implement a transition mode PFC controller. Figure 4. PFC section The control loop can be implemented thanks to the high performance error amplifier ...

  • Page 16

    Application information The ZCD input can be connected directly to an auxiliary winding of the PFC choke in order to turn on the MOSFET when the choke current reaches zero. This pin has internal clamps and high current capability that ...

  • Page 17

    L6585DE 5.2.4 Over-voltage protection Two different over-voltage protections can be detected: dynamic over-voltage, usually due to fast load transition and static over-voltage, due to an excessive input voltage. ● Dynamic OVP The CTR pin is connected to high voltage rail ...

  • Page 18

    Ballast section 6 Ballast section 6.1 Half-bridge drivers and integrated bootstrap diode The half-bridge drivers are capable of 290 mA source and 480 mA sink current. This makes them able to effectively drive also big MOSFETs 2.2 ...

  • Page 19

    L6585DE edge blanking is active during this time in order to avoid any detection of hard switching events, very common during this phase. 3. Ignition: At the end of the TCH cycle, the EOI pin is left free in high ...

  • Page 20

    Ballast section The oscillator characteristic curves represent the half bridge frequency versus the resistance R placed between RF pin and ground. During preheating R is equal to R parallel with R PRE value of the C OSC The value of ...

  • Page 21

    L6585DE 6.3 Startup sequence with old or damaged lamps When an old lamp is connected to the ballast the strike voltage is higher than the nominal voltage and may also be higher than the safety threshold. In this case the ...

  • Page 22

    Ballast section 6.4 Old lamp management during run mode During run mode, an old lamp can exhibit three different abnormal behaviors: ● Rectifying effect ● Over-current ● Hard switching event 6.5 Rectifying effect The rectifying effect is related to a ...

  • Page 23

    L6585DE Figure 12. End-of-life protection in lamp-to-ground configuration Ballast section 23/33 ...

  • Page 24

    Ballast section Figure 13. End-of-life protection in blocking capacitor-to-ground configuration 24/33 L6585DE ...

  • Page 25

    L6585DE 6.6 Over-current protection The appearance of over-current and hard switching events are related to a symmetrical increase of the ohmic resistance of the two cathodes. The overall effect results in an increased equivalent resistance of the lamp and a ...

  • Page 26

    Ballast section Figure 15. Example of capacitive mode operation due to ballast choke saturation OUT pin Therefore, in ignition and run mode a comparator, connected to the HBCS pin, is active with a threshold respectively equal to 2.75 V and ...

  • Page 27

    L6585DE Figure 16. Half-bridge current sense pulse detection areas Ballast section 27/33 ...

  • Page 28

    Ballast section Table 6. Table of faults Active during Fault PH Ign Fault with immediate activation of latched operating mode Shutdown PFC feedback disconnection Half bridge anti- saturation protection Fault with immediate activation of a non latched operating mode PFC ...

  • Page 29

    L6585DE 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ...

  • Page 30

    Package mechanical data Table 7. SO-20 mechanical data Dim Figure 17. Package dimensions 30/33 mm. Min. Typ. Max. 2.65 0.1 0.2 2.45 0.35 0.49 0.23 ...

  • Page 31

    ... L6585DE 8 Ordering information Table 8. Order codes Order codes L6585DE L6585DETR Ordering information Package Packaging SO-20 SO-20 Tape and reel Tube 31/33 ...

  • Page 32

    Revision history 9 Revision history Table 9. Document revision history Date 27-Nov-2008 10-Apr-2009 32/33 Revision 1 Initial release 2 Updated Table 1,Table L6585DE Changes 2, Table 3, Figure 4 ...

  • Page 33

    ... L6585DE Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...