L6572
High
voltage smart ballast controller
Datasheet − production data
Features
■ 600 V half-bridge driver ■ Integrated bootstrap diode ■ Failure protection logic ■ Programmable deadtime ■ Programmable preheated start ■ Two-step dimming with programmable dimmed
current ■ Thermal powerboost ■ Closed loop control operation
SO14
Applications
■ CFLi ■ Electronic ballast
Figure 1.
Block diagram
GND
TSD
VS
COUNTER
DAC
IGNITION RECOGNI-
TION
2 STEP DIMMING
UVLO
VREF
OUTPUT STAGE
DEAD TIME
TPB ZVS
HSD LSD
CLOCK
RATED CURRENT
CURRENT REGULATION
SIGNAL PROCESSING
BOOT HVG OUT LVG
SENSE
RCL
RPH RNO RDO
RDT
AM14881v1
October 2012
This is information on a product in full prod...