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参数资料
| 型号： | IRS2552DSPBF |
| 厂商： | International Rectifier |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST CTLR CCFL/EEFL 16SOIC |
| 标准包装： | 45 |
| 类型： | CCFL/EEFL 控制器 |
| 频率： | 39 ~ 69 kHz |
| 电流 - 电源： | 10mA |
| 电流 - 输出： | 450mA |
| 电源电压： | 10.6 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 |
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IRS2552D
Oscillator
During UVLO and shutdown and the voltage at the MIN and MAX pins remain at 0 V. When V CC is raised above
V CCUV+ the oscillator will start and LO and HO will produce output drive waveforms at frequency F MAX . The MAX
pin sources 5 V and the resistance connected from this point to COM determines the C T charging current and
consequently the frequency. R MIN is always connected from the MIN pin to COM, which sets the RUN mode
frequency. In IGNITION mode the MAX pin supplies 5 V to R MAX , which is connected to COM setting a higher C T
charging current and consequently a higher ignition frequency, as R MAX is smaller than R MIN . In RUN mode the
MAX pin is no longer active and the voltage will drop to 0V. C T charges until the voltage reaches the 5 V
threshold and then it is discharged rapidly to V CT- . It then begins to charge again, repeating this sequence and
producing a saw tooth waveform. The MIN pin sources 5 V during IGNITION and RUN modes. The current
flowing through F MIN to COM determines the charging current of C T during RUN mode and also serves as a
current reference for the currents supplied from the CD and CR pins.
VCC
VCCUV+
CT
VCT+
VCT-
DT
1/3*VCC
LO
HO
Figure 3: Oscillator waveforms
Deadtime
In the IRS2552D the dead time is determined by an independent external timing circuit comprising of R DT and
C DT and is not affected by the values of C T , R MIN or R MAX . The DT pin voltage is held at COM when LO or HO is
high. C DT is charged through R DT , which is connected to VCC, when DT is internally disconnected from COM at
the start of the dead time. The dead time ends when C DT has charged to 1/3 V CC . This allows the dead time to
remain consistent over the working range of V CC , i.e. from UVLO+ to the clamp voltage of 15.6 V.
Ignition
During the IGNITION phase the C R capacitor is charged through an internal current source ICR_IGN. When C R
reaches V CR+ then if the voltage at CS is greater than VCS IGN , the IRS2552D will enter RUN mode. If the voltage
at the CS pin is less than VCS IGN the IRS2552D will enter FAULT mode whereby LO and HO will both go low and
the IRS2552D will shut down until V CC is reduced below V CCUV- and then increased above V CCU+ . The ignition
function is achieved by applying a frequency somewhat above resonance to the output step up transformer and
resonant load. This should develop sufficient voltage across the lamps to allow partial ignition and some arc
current to flow. The combined lamp current is fed back to the CS pin through a suitable isolating network to
determine whether the lamps have ignited successfully. If a successful ignition is detected after the voltage at C R
has reached V CR+ then R MAX is disconnected inside the IRS2552D and the frequency will switch immediately to
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16
? 2009 International Rectifier
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| IRS2552DSTRPBF | 功能描述:功率驱动器IC CCFL / EEFL Ballast Cntrl IC 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 |
| IRS2573 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:HID BALLAST CONTROL IC |
| IRS2573D | 制造商:IRF 制造商全称:International Rectifier 功能描述:HID BALLAST CONTROL IC |
| IRS2573DSPBF | 功能描述:功率驱动器IC HID BALLAST CTRL IC 600V 180mA 1.2us 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 |
| IRS2573DSTRPBF | 功能描述:功率驱动器IC Buck & Full-Brdg HID ballast Cntrl IC 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 |
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