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参数资料
| 型号： | IR21571S |
| 厂商： | International Rectifier |
| 英文描述： | FULLY INTEGRATED BALLAST CONTROL IC |
| 中文描述： | 完全集成的镇流器控制IC |
| 文件页数： | 10/17页 |
| 文件大小： | 234K |
| 代理商： | IR21571S |
IR21571
(S)
10
www.irf.com
Figure 5: Deadtime versus R
DT
During the
Startup Mode
, the operating frequency is
determined by the parallel combination of R
PH
,
R
START
, and R
T
, combined with the values of C
START
,
C
T
and R
DT
, as shown in Figure 6. This frequency is
normally chosen to ensure that the instantaneous
voltage across the lamp during the first few cycles of
operation does not exceed the strike potential of the
lamp. As the voltage across C
START
charges up to the
R
T
lead voltage, the output frequency exponentially
decays to the preheat frequency.
During the Preheat Mode, the operating frequency
is determined by the parallel combination of R
PH
and
R
T
, combined with the value of C
T
and R
DT
. This
frequency, along with the Preheat Time, is normally
chosen to ensure that adequate heating of the lamp
filaments occur. Typically, a 4.5:1 ratio of the hot
filament-to-cold filament resistance is desired for
maximum lamp life, as shown in Figure 7.
Figure 6: Oscillator section block diagram with external component connection
0.1
1
10
1
100
RDT (Kohms)
tDEAD
(usec)
CT = 220 pF
CT = 470 pF
CT = 1 nF
2
4.0V
5.1V
3
5
7.6V
1.0uA
4
2.0V
I
RT
6
I
CT
= I
RT
7
4.0V
2.0V
CPH
RPH
RT
RUN
CT
DT
Q
S
R1
R2 Q
UNDER-
VOLTAGE
DETECT
C
PH
C
IGN
R
T
C
START
R
START
C
T
R
DT
R
PH
R
RUN
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR21571SPBF | 功能描述:功率驱动器IC BALLAST CTRL BELO 600V 15.6V VCC 150uA RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IR21571STR | 功能描述:IC BALLAST CONTROL INTEG 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
| IR21571STRPBF | 功能描述:功率驱动器IC Ballast Cntrl Thrml Ovrload Prot RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| IR2157S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Ballast Control. Below Resonance Protection. Thermal Overload Protection. Protection from Failure to Strike. Programmable Preheat Time and Run Frequency. Programmable Deadtime in a 16-lead SOIC Narrow package |
| IR2159 | 制造商:IRF 制造商全称:International Rectifier 功能描述:DIMMING BALLAST CONTROL IC |
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