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參數資料
| 型號： | IR21592S |
| 廠商： | International Rectifier |
| 英文描述： | DIMMING BALLAST CONTROL IC |
| 中文描述： | 調光鎮(zhèn)流器控制IC |
| 文件頁數： | 14/25頁 |
| 文件大?。?/td> | 259K |
| 代理商： | IR21592S |
IR21592/IR21593
(S)
14
www.irf.com
Functional Description
Phase Control
To understand phase control, a simplified model
for the ballast output stage is used (Figure 1). The
lamp and filaments are replaced with resistors,
with the lamp inserted between the filament
resistors (R1, R2, R3 and R4).
L
C
Rlamp
Vin
R1
R2
R3
R4
Figure 1, Dimming ballast output stage.
During preheat and ignition (Figure 2), the circuit
is a high-Q series LC with a strong input current to
input voltage phase inversion from +90 to -90
degrees at the resonance frequency. For operating
frequencies slightly above resonance and higher,
the phase is fixed at -90 degrees for the duration
of preheat and ignition. During dimming, the circuit
is an L in series with a parallel R and C, with a
weak phase inversion at high lamp power and a
strong phase inversion at low lamp power.
-30
-20
-10
0
10
20
5
10
15
20
25
30
35
40
45
50
Frequency [kHz]
M
-100
-50
0
50
100
150
200
250
300
350
400
P
10%
50%
100%
100%
50%
10%
PH/IGN
PH/IGN
Figure 2, Typical output stage transfer function for
different lamp power levels.
In the time domain (Figure 3), the input current is
shifted -90 degrees from the input half-bridge
voltage during preheat and ignition, and
somewhere between 0 and -90 degrees after
ignition during running. Zero phase-shift
corresponds to maximum power.
n
run
n
ph/ign
V
in
I
in
t
ph/ign
0
I
inrun
Figure 3, Typical ballast output stage waveforms.
When the phase is calculated and plotted versus
lamp power (Figure 4), the result is a linear dimming
curve, even down to ultra-low light levels where
the resistance of the lamp can change by orders
of magnitude.
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| IR21592SPBF | 功能描述:功率驅動器IC DIMMING BALLAST CTRL 0.5 to 5V DC RoHS:否 制造商:Micrel 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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| IR21592STRPBF | 功能描述:功率驅動器IC Dim Ballast Cntrl 1.8us Deadtime RoHS:否 制造商:Micrel 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IR21593 | 功能描述:IC CTRLR BALLAST DIMMING 16-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| IR21593PBF | 功能描述:功率驅動器IC Dim Ballast Cntrl 1.8us Deadtime RoHS:否 制造商:Micrel 產品: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 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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