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PDF L6585D Data sheet ( Hoja de datos )

Número de pieza L6585D
Descripción PFC and Ballast Control IC
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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L6585D
Combo IC for PFC and ballast control
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
SO-20
Applications
Electronic ballast
Block diagram
INV
ZCD
PFG
CTR
COMP
2.5V
+
_
E/A
MULT
MULTIPLIER
and THD
OPTIMIZER
1V OL
PFCS
LEB
PWM
COMP.
0.7V
Vcc
STARTER
SR
Q
PFSTOP
OL
OVP
WINDOW
COMPARATOR
& REF.
3.4V
EOLR
0.8V
DIS
2V
2V
Vcc
1.7V
17V
_ UV
DETECTION
CHOKE
SAT.
DEAD
TIME
SYNCHRONOUS
BOOTSTRAP DIODE
DRIVING
HVG
DRIVER
LEVEL
SHIFTER
LATCH
OVP
PFSTOP
DIS
EOL
CONTROL
LOGIC
LOGIC
LVG DRIVER
HB STOP
1.5V
1.9V
CCO
TIMING
MANAGEMENT
4.6
1.5
BOOT
HSD
OUT
Vcc
LSD
GND
HBCS
0.9V
Vcc
0.8V
RELAMP
EOLP
RF OSC EOI
Tch
December 2006
Rev 3
1/25
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25

1 page




L6585D pdf
L6585D
Pin settings
2.2
Functions
Table 1. Pin functions
Pin num. Name
Function
1
OSC
An external capacitor to GND fixes the half-bridge switching frequency with a
±3% precision.
Voltage reference able to source up to 240µA; the current sunk from this pin fixes
the switching frequency of the half-bridge for each operating state.
2
RF
A resistor (RRUN) connected to ground sets the half-bridge operating frequency
combined with the capacitor connected to the pin OSC.
A resistor connected to EOI (RPRE) – in parallel with RRUN – sets the maximum
half-bridge switching frequency during pre-heating.
Connected to ground by a capacitor that, combined with RPRE, determines the
ignition duration
3 EOI Pre-heating: low impedance to set high switching frequency
Ignition and run mode: high impedance with controlled current sink in case of
HBCS threshold triggering.
Pin for setting the pre-heating time and the protection intervention.
Connect a RC parallel network (RD and CD) to ground
Pre-heating: the CD is charged by an internal current generator. When the pin
voltage reaches 4.63V the generator is disabled and the capacitor discharges
4 Tch because of RD; once the voltage drops below 1.52V, the preheating finishes, the
ignition phase starts and the RDCD is discharged to ground.
Run mode: according to the kind of fault (either over-current or EOL) the
internal generator charges the RC parallel network and appropriate actions are
taken to stop the application. During proper behavior of the IC, this pin is low
impedance.
Pin to program the EOL comparator.
5 EOLP It is possible to select both the EOL sensing method and the window comparator
amplitude by connecting a resistor (REOLP) to ground.
Input for the window comparator and re-lamp function.
It can be used to detect the lamp ageing for either “lamp to ground” and “block
capacitor to ground” configurations.
According to the EOLP pin setting, it is possible to program:
– the window amplitude (VW)
6
EOL-R
the center
bus.
of
the
window
(VSET)
either
fixed
or
in
tracking
with
the
PFC
output
This function is blanked during the ignition phase.
In case of either lamp disconnection or removal, a second threshold (VSL-UP)
crossing latches the IC and drives the chip in “ready-mode” so that when the
voltage at EOL-R pin is brought below VSL-DOWN (re-lamp) a new pre-
heating/ignition sequence is repeated.
Input pin for:
– PFC over-voltage detection: the PFC driver is stopped until the voltage returns
in the proper operating range
7 CTR – Feedback disconnection detection
– reference for End-of-life in case tracking reference;
– shut-down: forcing the pin to a voltage lower than 0.75V, the IC shuts down in
unlatched condition.
Main input to the multiplier. This pin is connected to the rectified mains voltage
8 MULT via a resistor divider and provides the sinusoidal reference to the PFC current
loop.
5/25

5 Page





L6585D arduino
L6585D
Electrical characteristics
Table 4. Electrical characteristics (continued)
Symbol
Pin
Parameter
Test condition
Min Typ Max Unit
EOL-R
EOL-R
Sink/source capability
Relamp comparator
hysteresys
2.5 µA
4.63 V
160 mV
Half bridge section – Half-bridge current sense
HBCSH
HBCSL
HBCS
HBCS
HBCS
Frequency increase
threshold
Latched threshold
VEOI < 1.9V (ignition)
VEOI > 1.9V (run mode)
Run mode
1.53 1.6 1.66
0.85 0.91 0.97
1.53 1.6 1.66
V
V
V
Half bridge section – Low side gate driver
TRISE
TFALL
LSD Output low voltage
LSD Output high voltage
LSD Peak source current
LSD Peak sink current
LSD Rise time
LSD Fall time
LSD Pull-down resistor
ISINK = 10mA
ISOURCE = 10mA
0.3 V
14.5 V
200 290
mA
400 480
mA
120 ns
80 ns
; 45
K
Half bridge section – High side gate driver (voltages referred to OUT)
TRISE
TFALL
HSD Output low voltage
HSD
HSD
HSD
HSD
HSD
HSD
Output high voltage
Peak source current
Peak sink current
Rise time
Fall time
HSD-OUT pull-down
ISINK = 10mA
ISOURCE = 10mA
VBOOT
0.5
200
400
VOUT +
0.3
290
480
120
80
50
V
V
mA
mA
ns
ns
K
High-side floating gate-drive supply
BOOT
OUT
Leakage current
Leakage current
Synchronous bootstrap
diode on-resistance
VBOOT = 600V (2)
VOUT = 600V (2)
VLSD = HIGH
5
5
250
µA
µA
1. Parameter in tracking
2. Specification over the -40°C to 125°C junction temperature range are ensured by design, characterization and statistical
correlation
3. A pulse train has been sent to the HBCS pin with f=6KHz; the pulse duration is the one indicated in the notes as "TON"
11/25

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