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参数资料
| 型号： | IR21571S |
| 厂商： | International Rectifier |
| 文件页数： | 11/18页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CONTROL 16-SOIC |
| 其它有关文件： | 16-lead SOIC Narrow Package |
| 标准包装： | 45 |
| 类型： | 镇流器控制器 |
| 频率： | 45.5 ~ 50.5 kHz |
| 电流 - 电源： | 5.5mA |
| 电流 - 输出： | 500mA |
| 电源电压： | 11.4 V ~ 15.6 V |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 管件 |
| 其它名称： | *IR21571S |
IR21571(S) & (PbF)
Preheat
Ignition
Ramp
Run
The following graphs, Figures 8 and 9, illustrate the
relationship between the effective R T resistance (i.e.,
the parallel combination of resistors which programs
the C T capacitor charging current) and the operating
frequency.
150
FREQ
(KHz)
100
CT=220pF,RDT=11K
CT=470pF,RDT=6.2K
CT=1nF,RDT=3K
Figure 7: Lamp filament voltage during the
preheat, ignition ramp and run modes.
50
The Preheat Time is programmed by means of the
preheat capacitor, C PH , an internal 1 μ A current
source, and an internal threshold on the C PH lead of
0
0
5
10
15
20
RT (K ohms)
25
30
35
40
4.0V, according to the following formula:
Figure 8: fosc versus effective R T (t DEAD = 2.0 usec)
t PH = 4.7E6 ? C PH ,
C PH = 213E - 9 ? t PH
or
250
At the end of the Preheat Time, the internal, open-
drain transistor holding the R PH lead to ground turns
off, and the voltage on this lead charges exponentially
up to the R T lead potential. During this Ignition Ramp
Mode, the output frequency exponentially decays to
a minimum value. The rate of decay of this frequency
is a function of the R PH * C PH time constant. Because
the Ignition Ramp Mode ends when the voltage on
the C PH lead reaches 5.15V, the Ignition Ramp Mode
is always 1/4th as long as the preheat time.
When the C PH lead reaches 5.15V, an open-drain
transistor on the RUN lead turns on, and the external
R RUN resistor is then in parallel with the R T resistor.
The Run Mode operating frequency is therefore a
FREQ
(KHz)
200
150
100
50
0
CT=220pF, RDT=5.6K
CT=470pF, RDT=2.7K
CT=1nF, RDT=1.2K
function of the parallel combination of R RUN and R T ,
0
5
10
15
20 25
RT (K ohms)
30
35
40
and this means that the operating power of the lamp
can be programmed by means of R RUN .
www.irf.com
Figure 9: fosc versus effective R T (t DEAD = 1.0 usec)
11
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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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