L6574D013TR STMicroelectronics, L6574D013TR Datasheet - Page 6
Manufacturer Part Number
IC DRIVER BALLAST CFL/TL 16SOIC
Specifications of L6574D013TR
60 ~ 120 kHz
Current - Supply
Current - Output
Voltage - Supply
10 V ~ 15.6 V
-40°C ~ 125°C
Package / Case
16-SOIC (3.9mm Width)
Supply Voltage (min)
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Number Of Drivers
Number Of Outputs
For Use With
497-8225 - BOARD EVAL BASED ON L6574497-5576 - BOARD EVAL L6574 STD7NS20T4497-3823 - EVAL BOARD FOR HF TL BALLAST
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
A voltage controlled oscillator, with the selected frequencies fpre and fing, drives the output half bridge.
Independently selected, fpre is effective during tpre and fing is effective during normal lamp burning. When
working open loop, fpre and fing are the highest and lowest allowed oscillation frequencies.
Closed loop control of the lamp current under normal operation can be achieved with the L6574. This is
accomplished by automatic adjustment of the oscillator frequency. The OP AMP output is fed through a
resistor diode network to the Ring pin. See AN 993.
OP AMP Section:
The integrated OP AMP offers low output impedance, wide bandwidth, high input impedance and wide
common mode range. It can be readily used to implement closed loop control (see Oscillator Section) of
the lamp current.
EN1, EN2 Comparators:
Two CMOS comparators, with thresholds set at 0.6 V (typical) are available to implement protection meth-
ods (such as overvoltage, lamp removal, etc.). Short pulses (>200nsec) at the comparator inputs are rec-
The EN1 input (active high) forces the L6574 in the shut down state (e.g. LVG low, HVG low, oscillator
stopped) in the event of an undervoltage condition. Normal operating condition is resumed after a power-
off power-on sequence or when EN2 input is high.
The EN2 input (active high) also restarts a preheat sequence (see timing diagrams).