ICB2FL03G Infineon Technologies, ICB2FL03G Datasheet - Page 17

• 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

If V
whether the lamps are assembled by detecting a current across the filaments.
The low side filaments are checked from a source current of typical I
(Figure 5
resistor (R 36 in
Section
The high side filaments are checked by a current of I
(Figure
to GND. An open high side filament is detected (see
This causes a higher source current out of the RES pin (typically 42.6 µA / 35.4 µA) in order to exceed V
1.6 V. In the case of defective filaments, the IC keeps monitoring until an adequate current from the RES or the
LVS pin is present (e.g. in case of removal of a defective lamp).
When V
for 130 µs and senses the bus voltage. If the rated bus voltage is in the corridor of 12.5 % < V
IC powers up the system and enters phase 3
until the chip supply voltage falls below V
starts the inverter gate operation with an internal fixed start-up frequency of 135 kHz. The PFC gate drive starts
with a delay of approx. 300 µs. Next, the bus voltage will be checked for a rated level above 95 % for a duration
of 80 ms (phase 3,
from the internal fixed start-up frequency of 135 kHz down to the set preheating frequency – e.g. f
2.2.2
This section describes the operating flow from phase 5 (preheating mode) to phase 8 (run mode) in detail. In order
to extend the lifetime of the filaments, the controller enters – after the soft start phase – the preheating mode
(phase 5,
(Figure
time can be selected by the programming resistor (R23 in
(phase 5,
Figure 6
Preliminary Data Sheet
CC
exceeds the 10.6 V level and stays below 14.0 V (start-up hysteresis – phase 2,
CC
3) into the LVS pin 12 (for a single lamp operation). An unused LVS pin has to be disabled via connection
3) typ. 100 kHz e.g. R22 = 8.2 kΩ in parallel to R21 = 11.0 kΩ (see
2.3.2), when the voltage at the RES pin exceeds the V
I
Figure
Figure
RES
exceeds the 14.0 V threshold – by the end of the start-up hysteresis in phase 2 ,
Operating Levels from Soft Start to Run Mode
Typical Variation of Operating Frequency during Startup
). This current produces a voltage drop of V
135kHz
65kHz
40kHz
50kHz
0.8 V
f , V
Figure
V
6).
6). The preheating frequency is set by resistors R22 pin R
LSCS
Figure
Softstart proceeds in 15 steps à 650µs according Δf
Ignition proceeds in 127 steps à 324µs according Δf
Preheating Frequency with 8.7 kΩ Resistor from PIN RFPH to GND
RUN Frequency with a 12.0 kΩ Resistor from PIN RFRUN to GND
Start-Up
3), connected to GND (via low side filament). An open low side filament is detected (see
3
5). When leaving phase 3, the IC enters the soft start phase and shifts the frequency
Softstart
10ms
4
CC
Lamp Voltage
Frequency
< 10.6 V. As soon as the condition for a power-up is fulfilled, the IC
0-2500ms
(Figure 5
Preheating
5
Section
LVS
17
V
RES
> 12 µA typically via resistors R41, R42, R43 and R44
BUSrated
Controller for Fluorescent Lamp Ballasts
PH
IGN
< 1.6 V (filament is ok) at the low side filament sense
2.3.3) when there is no sink current into the LVS pin.
Figure
40-237ms
= (135kHz - f
= (f
Ignition
RES
6
> 95 % sensing); if not, the IC initiates a UVLO
PH
> 1.6 V threshold
- f
RUN
3) at pin RTPH from 0 ms up to 2500 ms
RES3
)/ 127steps.
PH
625ms
Pre-Run
)/ 15steps.
Figure
= - 21.3 µA flowing out of pin 13 RES
7
FPH
to GND in combination with R21
3, RFRUN pin). The preheating
Normal Operation
8
(Figure 5
Run
Figure
Functional Description
Figure 5
t
BUSrated
V1.1, 2012-04-10
V
5), the IC checks
RES
RFPH
ICB2FL03G
– the IC waits
).
< 105 %, the
= 100 kHz.
RES
>