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参数资料
| 型号： | IRS2166DSTRPBF |
| 厂商： | International Rectifier |
| 文件页数： | 13/18页 |
| 文件大小： | 0K |
| 描述： | IC CTRL PFC/BALLAST 16-SOIC |
| 标准包装： | 2,500 |
| 类型： | PFC/镇流器控制器 |
| 频率： | 40 ~ 46 kHz |
| 电流 - 电源： | 20mA |
| 电流 - 输出： | 260mA |
| 电源电压： | 12.5 V ~ 15.6 V |
| 工作温度： | -25°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： | 带卷 (TR) |
| 配用： | IRPLLNR7-ND - KIT UNIV ELEC BALLAST FLUOR LAMP |
IRS2166D(S)PbF
Over-Current Protection (OCP)
I LPFC
0
In case of fast on/off interruptions of the mains input
voltage, or, during normal lamp ignition, the DC bus
voltage level can decrease below the instantaneous
rectified line voltage. Should this occur, the PFC inductor
current and PFC MOSFET current can increase to high
PFC
pin
0
levels causing the PFC inductor to saturate and/or the
PFC MOSFET to become damaged. During fast on/off
interruptions of the mains input voltage, the DC bus can
near peak region of
rectified AC line
near zero-crossing region
of rectified AC line
drop during the time when the mains input voltage is
interrupted (off). Since VCC is still above UVLO-, the IC
will continue to operate and will increase the COMP pin
www.irf.com
Fig. 12: On-time modulation near the zero-crossings
decrease below the internal 4.0 V threshold (V BUSREG ), a
watch-dog pulse is forced on the PFC pin and normal
PFC operation is resumed.
Undervoltage Reset (UVR)
When the line input voltage is decreased, interrupted or a
brown-out condition occurs, the PFC feedback loop
causes the on-time of M PFC to increase in order to keep
the DC bus constant. Should the on-time increase too
far, the resulting peak currents in L PFC can exceed the
saturation current limit of L PFC . L PFC will then saturate and
very high peak currents and di/dt levels will occur. To
prevent this, the maximum on-time is limited by limiting
the maximum voltage on the COMP pin with an external
zener diode D COMP (Fig. 8). As the line input voltage
decreases, the COMP pin voltage and therefore the on-
time will eventually limit. The PFC can no longer supply
enough current to keep the DC bus fixed for the given
load power and the DC bus will begin to drop.
Decreasing the line input voltage further will cause the
VBUS pin to eventually decrease below the internal 3 V
threshold (V BUSUV ) (Fig. 9). When this occurs, V CC is
discharged internally below V CCUV -, the IRS2166D enters
UVLO mode and both the PFC and ballast sections are
disabled (see State Diagram). The start-up supply
resistor to V CC , together with the micro-power start-up
current of the IRS2166D, determines the line input turn-
on voltage. This should be set such that the ballast turns
on at a line voltage level above the undervoltage turn-off
level, V CCUV+ . It is the correct selection of the value of the
supply resistor to V CC and the zener diode on the COMP
pin that correctly program the on and off line input voltage
thresholds for the ballast. With these thresholds correctly
set, the ballast will turn off due to the 3.0 V undervoltage
threshold (V BUSUV ) on the VBUS pin, and on again at a
higher liine input voltage (hysterisis) due to the supply
resistor to V CC . This hysterisis will result in a proper reset
of the ballast without flickering of the lamp, bouncing of
the DC bus or re-ignition of the lamp when the DC bus is
too low.
voltage to increase the PFC MOSFET on-time due to the
dropping of the DC bus. When the mains voltage returns
again quickly (before VCC reaches UVLO-), the on-time
of the PFC MOSFET is too long for the given mains input
voltage level resulting in high PFC inductor and MOSFET
currents that can saturate the inductor and/or damage the
PFC MOSFET (Fig. 13).
Fig. 13: High PFC inductor current during fast mains
on/off (upper trace: DC Bus, 100V/div; middle trace: AC
line input voltage, 100V/div; lower trace: PFC inductor
current 1A/div).
During lamp ignition, the DC bus can drop below the
rectified AC line voltage causing current to conduct
directly from the output of the rectifier, through the PFC
inductor and diode, to the DC bus capacitor. This results
in a low-frequency offset of current in the PFC inductor.
Since the zero-crossing detection circuit only detects the
high-frequency zero-crossing of the inductor current, the
PFC MOSFET will turn on again each cycle before the
inductor current has reached zero. This causes the PFC
to work in a continuous conduction mode and the sum of
the low-frequency and high-frequency components of
current can saturate the PFC inductor and/or damage the
PFC MOSFET. To protect against these conditions, a
current sense resistor (ROC) must be inserted between
the source of the PFC MOSFET and ground, and a series
diode (DOC) and limiting resistor (RD) connected from
the top of the current sensing resistor to the VBUS pin
(Fig. 14).
Page 13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IRS21681DSPBF | 制造商:International Rectifier 功能描述:ADVANCED PFC AND BALLAST CONTROL IC - Rail/Tube 制造商:International Rectifier 功能描述:IC LIGHT BALLAST CONTROL |
| IRS21681DSTRPBF | 功能描述:开关变换器、稳压器与控制器 Advanced PFC & Ballast Cntrl IC RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IRS2168DPBF | 功能描述:功率驱动器IC Advanced PFC & 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 |
| IRS2168DSPBF | 功能描述:功率驱动器IC ADVANCED PFC BALLAST CTRL 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 |
| IRS2168DSPBF | 制造商:International Rectifier 功能描述:MOSFET Driver IC |
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