L6585DE

Manufacturer Part NumberL6585DE
DescriptionIC CTRL PFC/BALLAST COMBO 20-SOI
ManufacturerSTMicroelectronics
TypePFC/Ballast Controller
L6585DE datasheet
 


Specifications of L6585DE

Frequency58.4 ~ 62 kHzCurrent - Supply7mA
Current - Output600mAVoltage - Supply11 V ~ 16 V
Operating Temperature-40°C ~ 150°CPackage / CaseSO-20
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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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

L6585DE Summary of contents

  • Page 1

    ... 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 ...

  • Page 2

    ... Startup sequence with old or damaged lamps . . . . . . . . . . . . . . . . . . . . . 21 6.4 Old lamp management during run mode . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.5 Rectifying effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.6 Over-current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6.7 Hard switching protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2/33 TM PFC operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Leading edge blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 THD optimizer feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Over-voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Disabling the L6585DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Feedback disconnection protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 PFC over-current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 L6585DE ...

  • Page 3

    ... L6585DE 6.8 Choke saturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 8 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Contents 3/33 ...

  • Page 4

    ... Connected to ground by a capacitor that, combined with R ignition time. Preheating: low impedance to set high switching frequency Ignition and run mode: high impedance with controlled current sink in case of HBCS threshold triggering. Function ) sets the maximum half-bridge switching R and C . RUN OSC , determines the PRE L6585DE ...

  • 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 network (R Preheating: the C is charged by an internal current generator. When the pin d voltage reaches 4.63 V the generator is disabled and the capacitor discharges because of R ...

  • Page 6

    ... Run mode: in case of threshold crossing because of current spikes (due, for example, to capacitive mode / cross-conduction) longer than 200 ns the L6585DE is latched in low consumption mode to avoid damage to the MOSFETs. Third level threshold (2.75 V, active during ignition and run mode): - Ignition: in case of threshold crossing during frequency shift (e.g. caused by choke saturation), the IC latches to avoid damage to the MOSFETs ...

  • 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 CTR V 14 HBCS EOLP F OSC(MAX) P TOT 1. The device has an internal clamping Zener between GND and the VCC pin. It must not be supplied by a low impedance voltage source ...

  • Page 8

    ... RUN Min. Typ. Max 13.6 14.3 15 9.6 10 °C 16.7 17.1 17 17.1 18 250 370 7 350 0. 0.52 COMP 2.47 2.52 2. 2.4 V -2.6 INV = 2 INV 4.2 2.25 1.2 2.1 2.25 2.4 L6585DE Unit µA mA µA -1 µA V V/V 1 µA dB MHz ...

  • 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 t PFCS Leading edge blanking ...

  • Page 10

    ... CTR EOLP 2.5 < 91 kΩ L6585DE Unit µ 0.1 µA µA Ω µA Ω µ µ µs 62 KHz KHz µ ...

  • 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 first low side on HBCS HBCS time after Tch cycle ...

  • Page 12

    ... A pulse train has been sent to the HBCS pin with kHz; the pulse duration is the one indicated in the notes as "TON" 12/33 Parameter Test condition V = 600 V BOOT V = 600 V OUT V = HIGH LSD Min. Typ. Max. 120 80 50 (2) (2) 250 L6585DE Unit ns ns kΩ 5 µA 5 µA Ω ...

  • 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 linear multiplier including a THD optimizer that allows for an extremely low THD, even over a large range of input voltages and loading conditions ...

  • Page 14

    ... 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 of the internal structures. An internal voltage clamp limits the voltage to around 17 V and can deliver mA. For ...

  • 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 and the very precise internal voltage reference that fixes the non-inverting input of the E/A to 2.52 V ± ...

  • Page 16

    ... This may cause heavy crossover distortion and subsequent THD degradation. A small offset voltage superimposed over the MULT voltage can reduce this issue. The internal THD optimizer increases the performance when the mains voltage reaches zero; this reduces crossover distortion and avoids offset introduction. 16/33 L6585DE ...

  • Page 17

    ... A steady over-voltage causes a slow transition of the COMP pin towards the low saturation (around 2.25 V). This fact is considered by the L6585DE as a static over-voltage event and a Tch cycle is started. After this cycle, if the COMP pin is saturated low the IC is latched in low consumption mode ...

  • Page 18

    ... TCH pin is pulled down and the preheating time ends. During this sequence the EOI pin is pulled down and the half-bridge frequency is the startup frequency. A leading 18/33 7, normal startup proceeds as follows: and using the RF current as the control signal. With the EOI pin C OSC (see typical application diagram). L6585DE ...

  • 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 impedance mode. Therefore, the capacitor connected between EOI and ground is charged by RF through ...

  • Page 20

    ... Figure 10. is measured between pin 1 (OSC) and 15 (GND); for other capacitor . PRE Tch ≅ ⋅ ⋅ IGN PRE IGN . Each curve is related to a RUN and F “ F RUN PRE ⎛ ⎞ ⋅ ⎜ ⎟ ⎝ ⎠ L6585DE in RUN ...

  • Page 21

    ... The same occurs if the lamp tube is broken: the lamp cannot ignite and the lamp voltage must be limited. During ignition time, the L6585DE senses the current flowing into the lamp through a sense resistor connected to the HBCS pin. If the HBCS pin voltage reaches 1 small amount of current is sunk from the EOI pin causing a small frequency increase ...

  • Page 22

    ... As soon as the comparator is triggered, a Tch cycle starts in order to improve the noise immunity. 22/33 Reference V CTR 2 CTR 2.5 V Figure W – – W − are the maximum allowed values of V DOWN Figure useful when the lamp is connected between Window amplitude (Wv) +160 mV / -150 mV 240 mV + 250 mV / -240 mV 720 mV ) can be used when the lamp is connected K L6585DE ...

  • 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

    ... These spikes may overheat the MOSFETs but, if correctly detected, can prevent the risk of working below the resonance frequency (capacitive mode). The L6585DE can detect these spikes by means of a 2.75 V threshold on HBCS pin, and a counter that shuts down the IC if 350 (typ.) subsequent spikes are detected. ...

  • Page 26

    ... Spikes with a duration longer than 200 ns: (ASP region) anti-saturation protection will certainly be activated at the first event. 26/33 HBCS Good Saturating Capacitive working slightly mode L6585DE ...

  • Page 27

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

  • Page 28

    ... Turn off – turn on sequence Wait for output voltage reduction Wait for next starter event Check the mains voltage < COMP Replace the lamp EOL with a new one Replace the lamp with a new one >reduced threshold IC Replace the lamp with a new one L6585DE > 0.75 V ...

  • 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. ECOPACK trademark. Package mechanical data ® 29/33 ...

  • Page 30

    ... Min. Typ. 0.004 0.014 0.009 0.020 45° (typ.) 0.496 0.393 0.050 0.450 0.291 0.020 8° (max.) L6585DE Max. 0.104 0.008 0.096 0.019 0.012 0.512 0.419 0.300 0.050 0.029 ...

  • 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. ...