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參數(shù)資料
| 型號： | IR2166PBF |
| 廠商： | International Rectifier |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | PFC & BALLAST CONTROL IC |
| 中文描述： | 功率因數(shù)校正 |
| 文件頁數(shù)： | 26/29頁 |
| 文件大?。?/td> | 371K |
| 代理商： | IR2166PBF |
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IR2166
26
www.irf.com
to increase in order to keep the DC bus constant.
Should the on-time increase too far, the resulting
peak currents in LPFC can exceed the saturation
current limit of LPFC. LPFC 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 DCOMP
(Figure 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 3V threshold (Figure
9). When this occurs, VCC is discharged
internally to UVLO-, the IR2166 enters UVLO
mode and both the PFC and ballast sections
are disabled (see State Diagram). The start-up
supply resistor to VCC, together with the micro-
power start-up current of the IR2166, determine
the line input turn-on voltage. This should be
set such that the ballast turns on at a line voltage
level above the under-voltage turn-off level. It
is the correct selection of the value of the supply
resistor to VCC 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 3V under-voltage threshold
on the VBUS pin, and on again at a higher line
input voltage (hysterisis) due to the supply
resistor to VCC. 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.
Ballast Design Equations
Note: The results from the following design
equations can differ slightly from experimental
measurements due to IC tolerances, component
tolerances, and oscillator over- and undershoot
due to internal comparator response time.
Step 1: Program Dead-time
The dead-time between the gate driver outputs
HO and LO is programmed with timing capacitor
CT and an internal dead-time resistor RDT. The
dead-time is the discharge time of capacitor CT
from 3/5VCC to 1/3VCC and is given as:
1475
=
T
DT
C
t
[Seconds]
(1)
or
1475
DT
T
t
C
=
[Farads]
(2)
Step 2: Program Run Frequency
The final run frequency is programmed with
timing resistor RT and timing capacitor CT. The
charge time of capacitor CT from 1/3VCC to
3/5VCC determines the on-time of HO and LO
gate driver outputs. The run frequency is
therefore given as:
)
1475
51
.
2
1
+
=
T
T
RUN
R
C
f
[Hertz] (3)
or
2892
02
.
1
=
RUN
T
T
f
C
R
[Ohms] (4)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IR2166PBF | 制造商:International Rectifier 功能描述:Controller IC Output Voltage Max.:25V |
| IR2166S | 功能描述:IC PFC/BALLAST CONTROL 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)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(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| IR2166SPBF | 功能描述:功率驅(qū)動器IC PFC BALLAST CTRL IC 600V 15.6V VCC ESD RoHS:否 制造商:Micrel 產(chǎn)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 |
| IR2166STRPBF | 功能描述:功率驅(qū)動器IC PFC Ballast Cntrl RoHS:否 制造商:Micrel 產(chǎn)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 |
| IR2167 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:PFC BALLAST CONTROL IC |
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