ICB1FL03G Infineon Technologies, ICB1FL03G Datasheet - Page 13

• Manufacturer Part Number: ICB1FL03G
• Description: IC SMART BALLAST CONTROL DSO18
• Manufacturer: Infineon Technologies
• Type: PFC/Ballast Controllerr

Specifications of ICB1FL03G

• Frequency: 20 ~ 100 kHz
• Current - Supply: 5mA
• Voltage - Supply: 8.4 V ~ 17 V
• Operating Temperature: -25°C ~ 125°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width) 18 leads
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Details

3.3
Within 10ms after start-up the inverter shifts operating frequency from 125kHz to the preheating frequency set by
resistor at pin RFPH. Preheating time can be selected by programming resistor at RFPH pin in steps of 17ms from
0ms to 2000ms.
After preheating the operating frequency of the inverter is shifted downwards in 40ms typically to the run
frequency. During this frequency shifting the voltage and current in the resonant circuit will rise when operating
close to the resonant frequency with increasing voltage across the lamp. As soon as the lower current sense level
(0,8V) is reached, the frequency shift downwards is stopped and increased by a couple of frequency steps in order
to limit the current and the ignition voltage also. The procedure of shifting the operating frequency up and down
in order to stay within the max ignition level is limited to a time frame of 235ms. If there is no ignition within this
time the control is disabled and the status is latched as a fault mode.
Figure 9
Figure 10
Preliminary Datasheet Version 1.02
Typical operating levels during start-up
Typical variation of operating frequency and lamp voltage during start-up.
Typical lamp voltage versus operating frequency due to load change of the resonant circuit.
Typical variation of operating frequency during start-up
125kHz
65kHz
50kHz
40kHz
f , V
Softstart
10ms
Softstart proceeds in 15 steps à 650µs according ∆f
Ignition proceeds in 127 steps à 324µs according ∆f
1000
900
800
700
600
500
400
300
200
100
10000
0
Without
Load
Load
With
Frequency
Lamp Voltage
Preheating
0-2000ms
Operating Frequency
13
Run
40-235ms
Ignition
Ignition
After
Ignition
PH
IGN
Pre-Run
Preheating
= (120kHz - f
250ms
= (f
PH
100000
- f
RUN
Normal Operation
)/ 127steps.
PH
)/ 15steps.
Functional Description
t
ICB1FL03G
March 2009