L6585D_07

Manufacturer Part NumberL6585D_07
DescriptionCombo IC for PFC and ballast control
ManufacturerSTMICROELECTRONICS [STMicroelectronics]
L6585D_07 datasheet
 


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Features
Pre-heating and ignition phases independently
programmable
Ignition voltage control
Transition mode PFC with over-current
protection
Programmable and precise End-of-life
protection compliant with all ballast
configurations
Auto-adjusting half-bridge over-current control
Automatic re-lamp
3% oscillator precision
1.2µs dead time
PFC over-voltage protection and feedback
disconnection
Under voltage lock-out
Figure 1.
Block diagram
COMP
COMP
MULT
MULT
2.5V
2.5V
E/A
E/A
+
+
MULTIPLIER
MULTIPLIER
_
_
and THD
and THD
INV
INV
OPTIMIZER
OPTIMIZER
1.2V
1.2V
OL
OL
ZCD
ZCD
STARTER
STARTER
0.7V
0.7V
Vcc
Vcc
PFG
PFG
PFSTOP
PFSTOP
CTR
CTR
OL
OL
OVP
OVP
3.4V
3.4V
DIS
DIS
2V
2V
0.75V
0.75V
EOLR
EOLR
RELAMP
RELAMP
4.63V
4.63V
May 2007
Combo IC for PFC and ballast control
Applications
Electronic ballast
PFCS
PFCS
Vcc
Vcc
LEB
LEB
1.7V
1.7V
17V
17V
_
_
+
+
_
_
DETECTION
DETECTION
PWM
PWM
COMP.
COMP.
CHOKE
CHOKE
SAT.
SAT.
S
S
R
R
Q
Q
LATCH
LATCH
OVP
OVP
PFSTOP
PFSTOP
WINDOW
WINDOW
DIS
DIS
COMPARATOR
COMPARATOR
EOL
EOL
& REF.
& REF.
1.9V
1.9V
2V
2V
VCO
VCO
EOLP
EOLP
RF
RF
OSC
OSC
EOI
EOI
Rev 5
L6585D
SO-20
HVG
HVG
UV
UV
DRIVER
DRIVER
SYNCHRONOUS
SYNCHRONOUS
BOOTSTRAP DIODE
BOOTSTRAP DIODE
DEAD
DEAD
LEVEL
LEVEL
TIME
TIME
SHIFTER
SHIFTER
DRIVING
DRIVING
LVG DRIVER
LVG DRIVER
LOGIC
LOGIC
CONTROL
CONTROL
1.6V
1.6V
HB STOP
HB STOP
LOGIC
LOGIC
TIMING
TIMING
MANAGEMENT
MANAGEMENT
4.6
4.6
1.5
1.5
BOOT
BOOT
HSD
HSD
OUT
OUT
Vcc
Vcc
LSD
LSD
GND
GND
HBCS
HBCS
0.9V
0.9V
Vcc
Vcc
Tch
Tch
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L6585D_07 Summary of contents

  • Page 1

    Features ■ Pre-heating and ignition phases independently programmable ■ Ignition voltage control ■ Transition mode PFC with over-current protection ■ Programmable and precise End-of-life protection compliant with all ballast configurations ■ Auto-adjusting half-bridge over-current control ■ Automatic re-lamp ■ 3% ...

  • Page 2

    Contents Contents 1 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    L6585D 1 Device description Designed in High-voltage BCD Off-line technology, the L6585D embeds a PFC controller, a half-bridge controller, the relevant drivers and the logic necessary to build an electronic ballast. The advanced and precise logic circuitry, combined with the ...

  • Page 4

    Pin settings 2 Pin settings 2.1 Connection Figure 3. Pin sonnection (Top view) 4/25 OSC OSC RF RF EOI EOI TCH TCH EOLP EOLP EOL-R EOL-R CTR CTR MULT MULT COMP COMP INV INV L6585D BOOT BOOT HSD HSD OUT ...

  • Page 5

    L6585D 2.2 Functions Table 1. Pin functions Pin num. Name 1 OSC EOI 4 Tch 5 EOLP 6 EOL-R 7 CTR 8 MULT An external capacitor to GND fixes the half-bridge switching frequency with a ±3% precision. ...

  • Page 6

    Pin settings Table 1. Pin functions (continued) Pin num. Name 9 COMP 10 INV 11 ZCD 12 PFCS 13 PFG 14 HBCS 15 GND 16 LSD 17 VCC 18 OUT 19 HSD 20 BOOT 6/25 Output of the error amplifier. ...

  • Page 7

    L6585D 3 Electrical data 3.1 Maximum ratings Table 2. Absolute maximum ratings Symbol Pin V 20 BOOT V 18 OUT dV /dt 18 OUT 10 ...

  • Page 8

    Electrical characteristics 4 Electrical characteristics V = 15V Table 4. Electrical characteristics Symbol Pin Supply voltage Vcc V Operating range Turn-on threshold CC(on Turn-off threshold CC(OFF ...

  • Page 9

    L6585D Table 4. Electrical characteristics (continued) Symbol Pin CTR pin Disable threshold DIS CTR Hysteresys Dynamic PFC overvoltage PFOV CTR Hysteresys Available range as tracking reference CTR PFC section – current sense comparator ICS PFCS Input bias current tLEB PFCS ...

  • Page 10

    Electrical characteristics Table 4. Electrical characteristics (continued) Symbol Pin Half bridge section – Timing & 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

    L6585D Table 4. Electrical characteristics (continued) Symbol Pin EOL-R Sink/source capability Relamp comparator EOL-R hysteresys Half bridge section – Half-bridge current sense Frequency increase HBCSH HBCS threshold HBCSL HBCS HBCS Latched threshold Half bridge section – Low side gate driver ...

  • Page 12

    Application information 5 Application information 5.1 Start-up sequence 5.1.1 Pre-heating (time interval A After IC turn-on, unless a lamp absence is detected, the oscillator starts switching at a frequency (f ) set by values of C PRE Equation 1 The ...

  • Page 13

    L6585D 5.1.2 Ignition (time interval B When the voltage at pin T impedance state and that defines the ignition time and the frequency shift starts. IGN PRE The ignition time is the time necessary to EOI ...

  • Page 14

    Application information 5.1.3 Run mode (time interval C As the voltage at EOI exceeds 1.9V and the lamp has ignited, the L6585D enters Run mode and remains in this condition unless one of the protections (all enabled in this mode) ...

  • Page 15

    L6585D 6 End of life – window comparator To detect the ageing of the lamp with particular attention to the effect appearing as asymmetric rectification, a programmable window comparator has been introduced (centered around “V higher than V REF By ...

  • Page 16

    End of life – window comparator The four possible configurations are summarized in the following table, together with the value of resistance to be connected to the EOLP pin in order to obtain the desired setting: Table 5. Configuration of ...

  • Page 17

    L6585D 7 Half-bridge current control The information about the lamp current can be obtained by reading the voltage across a sense resistor placed in series to the source of the half-bridge low side MOS. This circuitry is enabled at the ...

  • Page 18

    CTR 8 CTR This is a multi-function pin, connected to a resistive divider to the PFC output bus: ● PFC over-voltage: in case of PFC output overshoot (e.g. at start-up) that causes a threshold crossing, the PFC section stops switching ...

  • Page 19

    L6585D 9 Re–lamp A second comparator has been introduced on the pin EOL-R; a voltage higher than the internal threshold is read as lamp absence so the chip suddenly stops switching, enters idle mode (low consumption) and is ready for ...

  • Page 20

    Re–lamp Table 7. Fault conditions Fault Condition At turn-on: EOL-R voltage higher than 4.63V Lamp absence (re-lamp comparator) Run mode: EOL-R voltage higher than 4.63V EOL-R voltage outside End of life the limits of window comparator Ignition: HBCS threshold Half-bridge ...

  • Page 21

    L6585D 10 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the ...

  • Page 22

    Package mechanical data Table 8. SO-20 mechanical data Ref Figure 7. Package dimensions 22/25 Dimensions mm. Min. Typ. Max. 2.65 0.1 0.2 2.45 0.35 0.49 ...

  • Page 23

    L6585D 11 Order codes Table 9. Order codes Part Number L6585D L6585DTR Package Packaging SO-20 SO-20 Tape and Reel Order codes Tube 23/25 ...

  • Page 24

    Revision history 12 Revision history Table 10. Revision history Date 12-Jan-2006 25-Oct-2006 21-Dec-2006 12-Apr-2007 23-May-2007 24/25 Revision 1 Initial release 2 Final datasheet Updated f value on RUN 3 page 8 4 Updated electrical values on 5 Updated Figure 1: ...

  • Page 25

    L6585D 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 ...