L6585D_07 Datasheet, PDF (1/25 Pages) STMicroelectronics – Combo IC for PFC and ballast control

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
Figure 1. Block diagram
INV
ZCD
PFG
CTR
EOLR
COMP
2.5V
E/A
+
_
MULT
MULTIPLIER
and THD
OPTIMIZER
1.2V
OL
PFCS
LEB
PWM
COMP.
0.7V
Vcc
STARTER
S
R
Q
PFSTOP
OL
OVP
WINDOW
COMPARATOR
& REF.
3.4V
DIS
0.75V
2V
2V
Vcc
1.7V
17V
_
CHOKE
SAT.
UV
DETECTION
SYNCHRONOUS
BOOTSTRAP DIODE
DEAD
TIME
DRIVING
HVG
DRIVER
LEVEL
SHIFTER
LATCH
OVP
PFSTOP
DIS
EOL
CONTROL
LOGIC
LOGIC
LVG DRIVER
HB STOP
1.6V
1.9V
VCO
TIMING
MANAGEMENT
4.6
1.5
BOOT
HSD
OUT
Vcc
LSD
GND
HBCS
0.9V
Vcc
4.63V
RELAMP
EOLP
RF
OSC EOI
Tch
May 2007
Rev 5
1/25
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