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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(dòng)預(yù)熱 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 161K |
| 代理商： | L6574 |
5/10
L6574
High/Low Side Driving Section:
High and low side driving sections provide the proper drive to the external power MOSFET. A high sink/
source driving current (450/250 mA typical) ensures fast switching times when a size 4 external power
MOSFET needs to be driven.
Bootstrap Section:
A patented integrated bootstrap section replaces an external bootstrap diode. This section together with
a bootstrap capacitor provides the bootstrap voltage to drive the high side power MOSFET. This function
is achieved using a high voltage DMOS driver which is driven synchronously with the low side external
power MOSFET.
For a safe operation, current flow into the Vboot pin is inhibited, even though ZVS operation may not be
ensured.
Timing Section:
To set the proper preheat time (tpre=kpre*Cpre) for the bulb, a capacitor is connected to the Cpre pin
which is charged with a fixed current. During tpre, the output is switching at fpre (see Oscillator Section).
When the tpre expires, the Cpre capacitor is discharged and then recharged with a different current. This
sets a second time interval tsh (0.1 times the selected preheat time tpre) during which frequency shifting
from fpre to fing is performed to ensure lamp ignition.
Timing Section
k
pre
1
Pre Heat Timing constant
C
pre
= 330nF
1.15
1.5
1.85
s/
μ
F
k
fs
Frequency Shift Timing Constant
C
pre
= 330nF
0.115
0.15
0.185
s/
μ
F
V
thpre
Pre Heat Timing Comparator
Threshold
3.3
3.5
3.7
V
Sense OP AMP
l
ib
6,7
Input Bias current
0.1
μ
A
V
io
Input Offset Voltage
-10
10
mV
R
out
5
Ouput Resistance
200
300
I
out +
Sink Output Current
V
out
= 0.2V
0.5
mA
I
out -
Source Output Current
V
out
= 4.5V
0.5
mA
V
ic
6,7
Common Mode Input Range
-0.2
3
V
GBW
Sense Op Amp Gain Band Width
Product
1
MHz
Gdc
DC Open Loop Gain
80
dB
Comparators
V
the
8,9
Enabling Comparators Threshold
0.56
0.6
0.64
V
V
hy
e
Enabling Comparators Hysteresis
20
100
mV
t
pulse
Minimum Pulse lenght
200
ns
ELECTRICAL CHARACTERISTCS
(continued)
(V
S
= 12V; V
BOOT
-V
OUT
= 12V; T
amb
= 25°C)
Symbol
Pin
Parameter
Test Condition
Min.
Typ.
Max.
Unit
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| L6598 | 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(dòng)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(shí)間: 下降時(shí)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(dòng)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(shí)間: 下降時(shí)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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