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PDF L6585DE Data sheet ( Hoja de datos )
| Número de pieza | L6585DE | |
| Descripción | Combo IC | |
| Fabricantes | STMicroelectronics | |
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L6585DE
Combo IC for PFC and ballast control
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
SO-20
– 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
April 2009
Rev 2
1/33
www.st.com
33
Free Datasheet http://www.datasheet4u.com/
1 page  
L6585DE
Pin settings
Table 1. Pin functions (continued)
Pin n. Name
Function
Pin for setting the preheating time and protection intervention.
Connect an RC parallel network (Rd and Cd) to ground.
Preheating: the Cd is charged by an internal current generator. When the pin
voltage reaches 4.63 V the generator is disabled and the capacitor discharges
because of Rd. Once the voltage drops below 1.5 V, the preheating finishes, the
4 Tch ignition phase starts and the RdCd is pulled to ground.
Ignition and Run mode: During proper behavior of the IC, this pin is low
impedance. During a fault (either over-current or EOL) the internal generator
charges the Cd to 4.63 V and then another current generator discharges the
same capacitor. In this way, Cd sets the fault timing (shorter than preheating
time).
Pin to program the EOL comparator.
5 EOLP It is possible to select both the EOL sensing method (fixed reference or
reference in tracking with CTR) and the window comparator amplitude by
connecting a resistor (REOLP) to ground.
Input for the window comparator.
6
EOL
It can be used to detect lamp ageing for either “lamp to ground” or “block
capacitor to ground” configurations.
This function is blanked during the ignition phase.
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 EOL comparator (in case tracking reference)
- The pin can be used also for shutdown
8
MULT
Multiplier external input. This pin is connected to the rectified mains voltage via a
voltage divider and provides the sinusoidal reference to the PFC current loop.
Output of the error amplifier. A compensation network is placed between this pin
9 COMP and INV to achieve stability of the PFC voltage control loop and ensure high
power factor and low THD.
10
INV
Inverting input of the error amplifier. Output voltage of the PFC pre-regulator is
fed to the pin through a voltage divider.
Boost inductor demagnetization sensing input for PFC transition-mode
operation. A negative-going edge triggers PFC MOSFET turn-on.
11 ZCD
During startup or when the voltage is not high enough to arm the internal
comparator, the PFC driver is triggered by means of an internal starter.
Input to the PFC PWM comparator. The current flowing through the PFC
MOSFET is sensed through a resistor. The resulting voltage is applied to this pin
and compared with an internal sinusoidal-shaped reference, generated by the
12 PFCCS multiplier, to determine the PFC MOSFET’ s turnoff.
A second comparison level detects abnormal currents (due to boost inductor
saturation, for example) and, on this occurrence, shuts down the PFC gate.
An internal LEB prevents undesired function triggering.
5/33
Free Datasheet http://www.datasheet4u.com/
5 Page 
L6585DE
Electrical characteristics
Table 4. Electrical characteristics (continued)
Symbol
Pin
Parameter
Test condition
220 kΩ < REOLP <
270 kΩ
VW EOL Half window amplitude 22 kΩ < REOLP < 27 kΩ
EOL Sink/source capability
REOLP > 620 kΩ
75 kΩ < REOLP < 91 kΩ
Half bridge section – Half-bridge current sense
HBCSH
HBCSL
HBCSH,test
HBCSL,test
HBCSAS
tLEB,HBCS
HBCSCM
HBCSHS
NHS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
HBCS
Frequency increase
Threshold
Shut down threshold
during first low side on
time after Tch cycle
VEOI < 1.9 V (ignition)
VEOI > 1.9 V (run mode)
VEOI < 1.9 V (ignition)
VEOI > 1.9 V (run mode)
Anti saturation threshold Ignition
Leading edge blanking Ignition
Capacitive mode
threshold
Run mode,
Tpulse > 200 ns
Hard switching detector
Run mode,
Tpulse > 40 ns
Hysteresis
Hard switching events
before shutdown
Run mode
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 = 10 mA
ISOURCE = 10 mA
Half bridge section – High side gate driver (voltages referred to OUT)
HSD Output low voltage
ISINK = 10 mA
HSD
HSD
HSD
Output high voltage
Peak source current
Peak sink current
ISOURCE = 10 mA
Min.
1.53
0.98
1.53
14.5
200
400
VBOOT
– 0.5
200
400
Typ.
+250
-240
+160
-150
720
240
5.5
Max.
1.6 1.66
1.05 1.12
1.05
0.82
2.75
270
1.6 1.66
2.75
450
350
0.3
290
480
120
80
45
VOUT +
0.3
290
480
Unit
mV
µA
V
V
V
V
V
ns
V
V
mV
V
V
mA
mA
ns
ns
kΩ
V
V
mA
mA
11/33
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