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參數資料
| 型號： | ICB1FL02G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Smart Ballast Control IC for Fluorescent Lamp Ballasts |
| 中文描述： | 智能鎮(zhèn)流器控制芯片用于熒光燈鎮(zhèn)流器 |
| 文件頁數： | 11/37頁 |
| 文件大?。?/td> | 1143K |
| 代理商： | ICB1FL02G |
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ICB1FL02G
Functional Description
Datasheet Version 1.2
11
February 2006
3.2
PFC Preconverter
PFC is starting with a fixed frequent operation (ca. 25kHz), beginning with an on-time of 1μs and an off-time of
40μs. The on-time is enlarged every 400μs to a maximum on-time of 23μs. The control switches over into critical
conduction mode (CritCM) operation as soon as a sufficient ZCD signal is available. There is an overvoltage
threshold at 109% of rated Bus voltage that stops PFC Gate drive as long as the Bus voltage has reached a level
of 105% of rated Bus voltage again. The compensation of the voltage control loop is completely integrated. The
internal reference level of the Bus voltage sense (PFCVS) is 2,5V with high accuracy.
The PFC control operates in CritCM in the range of 23μs > on-time > 2,3μs. For lower loads the control operates
in discontinuous conduction mode (DCM) with an on-time down to 0,5μs and an increasing off-time. With this
control method the PFC preconverter covers a stable operation from 100% of load to 0,1% .
Figure 5
Circuit Diagram of the PFC preconverter section.
Overvoltage, undervoltage and open loop detection at pin PFCVS are sensed by analog comparators. The BUS
voltage loop control is provided by a 8bit sigma-delta A/D-Converter with a sampling rate of 400μs and a resolution
of 4mV/bit. So a range of +/- 0,5V from the reference level of 2,50V is covered. The digital error signal has to pass
a digital notch filter in order to suppress the AC voltage ripple of twice of the mains frequency. A subsequent error
amplifier with PI characteristic cares for stable operation of the PFC preconverter. During ignition and pre-run
mode the notch filter is bypassed in order to increase control loop reaction.
The zero current detection is sensed by a separate pin PFCZCD. The information of finished current flow during
demagnetization is required in CritCM and in DCM as well. The input is equipped with a special filtering including
a blanking of typically 500ns and is combined with a large hysteresis between the thresholds of typically 0,5V and
1,5V. In case of bad coupling between primary inductor winding and secondary ZCD-winding an additional filtering
by a capacitor at ZCD pin might be necessary in order to avoid mistriggering by long lasting oscillations during
switching slopes of the PFC MOSFET.
Figure 6
Structure of the mixed digital and analog control of PFC preconverter.
R
R
R
V
PFCZCD
PFCGD
PFCVS
PFCCS
HSGD
HSVCC
HSGND
LSGD
LSCS
L
L
R
G
90 ...
270 VAC
I
R1
R2
D1...4
L
RFI
L1
D5
Q1
R8
R7
R3
R4
R6
D9
C1
C2
C3 R9
R5 R12 R13
C7
VBUS
Vcc
PFCVS
PFCGD
PFCCS
PFCZCD
Pulse width
Generator
Gate
Driver
Overcurrent
Protection
1,0V +/-5%
ZCD
1,50V / 0,5V
Start-up
Clock
600kHz
PI Loop
Control
Notch
Filter
Undervoltage
73% +/- 2,5%
Overvoltage
109% +/-2,0%
Open Loop
Detection
15% +/- 20%
Σ
-ADC
SRate 400μs
Res 4mV/bit
Reference
2,50V
+/-1,5%
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ICB1FL02G IFX | 制造商:Infineon Technologies AG 功能描述: |
| ICB1FL02G_08 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Smart Ballast Control IC for Fluorescent Lamp Ballasts |
| ICB1FL02GXUMA1 | 制造商:Infineon Technologies AG 功能描述:Electronic Ballast Controller 12V/15V 100KHz T/R 制造商:Infineon Technologies AG 功能描述:Electronic Ballast Controller 12V/15V 100KHz 18-Pin DSO T/R 制造商:Infineon Technologies AG 功能描述:FL LIGHTING - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC SMART BALLAST CONTROL PDSO-18 |
| ICB1FL03G | 功能描述:LED照明驅動器 LIGHTING RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| ICB1FL03GXUMA1 | 制造商:Infineon Technologies AG 功能描述:ELECTRONIC BALLAST CONTROLLER 12V/15V 100KHZ 制造商:Infineon Technologies AG 功能描述:FL LIGHTING - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC SMART BALLAST CONTROL DSO18 |
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