ICB2FL03G Infineon Technologies, ICB2FL03G Datasheet - Page 23

• Manufacturer Part Number: ICB2FL03G
• Description: LED Drivers
• Manufacturer: Infineon Technologies

Specifications of ICB2FL03G

• Packages: PG-DSO-16
• Lead Free Status / Rohs Status: Details
• Other names: ICB2FL03GXT

2.4
2.4.1
The digitally controlled PFC preconverter starts with an internally fixed ON time of typically t
variable frequency. The ON time is increased every 280 µs (typical) up to a maximum ON time of 24 µs. The
control switches practically immediately from the discontinuous conduction mode (DCM) to critical conduction
mode (CritCM) as soon as a sufficient ZCD signal becomes available. The frequency range in CritCM is 22 kHz
to 500 kHz depending on the power
Figure 14
For lower loads (P
(DCM) with an ON time from 4.0 µs and increasing OFF time. The frequency during DCM is variable in a range
from 144 kHz down to typically 22 kHz @ 0.1 % load
enables stable operation from 100 % load down to 0.1 %.
(Critical Conduction Mode) operation. In the overlapping area of CritCM and DCM there is a hysteresis of the ON
time which causes a negligible frequency change.
2.4.2
Overvoltage, open loop, bus 95 % and undervoltage states
PFCVS pin via the network R14, R15, R20 and C11 –
1)
Preliminary Data Sheet
Normalized power @ low line input voltage and maximum load
1000,00
100,00
10,00
1,00
0,10
0,01
0,01
Discontinuous Conduction and Critical Conduction Mode Operation
PFC Bus Voltage Sensing
PFC Preconverter
Operating Frequency and ON Time versus Power in DCM and CritCM Operation
OUTNorm
Discontinuous Conduction Mode (DCM) <> Critical Condution Mode (CritCM)
ON Time @ DCM Operation
< 8 % from the normalized load
Light Load
0,10
Frequency DCM
Frequency @ DCM Operation
(Figure
14), with a variation of the ON time from 24 µs > t
Normalized Output Power [% ]
Increasing Power
Frequency CritCM
ON Time Hysteresis
in RUN MODE
Figure 3
(Figure
23
1,00
1)
Figure 14
) the control operates in discontinuous conduction mode
(Figure
Controller for Fluorescent Lamp Ballasts
14). With this control method, the PFC converter
(C11 acts as a spike suppression filter).
Ton DCM
ON Time Hysteresis
Nominal Load
Decreasing Power
shows the ON time range in DCM and CritCM
15) of the PFC bus voltage are sensed at the
PRE HEATING
Ton CritCM
10,00
Frequency @ CritCM Operation
ON Time @ CritCM Operation
Functional Description
ON
ON
V1.1, 2012-04-10
> 0.5µs.
= 4.0 µs and a
100,00
ICB2FL03G
100,00
10,00
1,00
0,10