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參數(shù)資料
| 型號： | L6574 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | CFL/TL BALLAST DRIVER PREHEAT AND DIMMING |
| 中文描述： | 節(jié)能燈/商標(biāo)法鎮(zhèn)流器和調(diào)光驅(qū)動預(yù)熱 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大小： | 161K |
| 代理商： | L6574 |
L6574
6/10
Oscillator Section:
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-
ognized.
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).
TIMING DIAGRAMS
V
CC
LVG
HVG
EN1
V
SUVP
D97IN490
V
CC
t
PRE
t
PRE
t
SH
t
SH
f
PRE
f
ING
EN2
f
OUT
V
SUVP
D97IN491B
相關(guān)PDF資料 |
PDF描述 |
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| L6574D | CFL/TL BALLAST DRIVER PREHEAT AND DIMMING |
| L6598 | HIGH VOLTAGE RESONANT CONTROLLER |
| L6598D | HIGH VOLTAGE RESONANT CONTROLLER |
| L6599 | High-voltage resonant controller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6574 | 制造商:STMicroelectronics 功能描述:DIMMABLE LAMP BALLAST 6574 DIP16 |
| L6574B | 制造商:STMicroelectronics 功能描述:CFL BALLAST DRV - Bulk |
| L6574D | 功能描述:功率驅(qū)動器IC CFL/TL Ballast RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| L6574D | 制造商:STMicroelectronics 功能描述:DIMMABLE LAMP BALLAST SMD 6574 |
| L6574D013TR | 功能描述:功率驅(qū)動器IC CFL/TL Ballast RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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