- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄385449 > IRS2166DPBF (International Rectifier) PFC + BALLAST CONTROL IC PDF資料下載
參數(shù)資料
| 型號(hào)： | IRS2166DPBF |
| 廠商： | International Rectifier |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | PFC + BALLAST CONTROL IC |
| 中文描述： | PFC的鎮(zhèn)流器控制IC |
| 文件頁(yè)數(shù)： | 11/17頁(yè) |
| 文件大?。?/td> | 454K |
| 代理商： | IRS2166DPBF |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)當(dāng)前第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)
www.DataSheet4U.com
IRS2166D(S)PbF
www.irf.com
Page 11
V
CC
is above V
CCUV
+ (ballast power on) and SD is pulled
above 5.0 V (V
SDTH+
) and back below 3.0 V (V
SDTH-
) (lamp
re-insertion), the IC will enter preheat mode and begin
oscillating again.
The current sense function will force the IC to enter fault
mode only after the voltage at the CS pin has been
greater than 1.20 V (V
CSTH+
) for 100 (n
EVENTS
) consecutive
cycles of LO. The
over-current function at the CS pin
(see Fig. 5) will only consecutive cycles of LO. The
over-
current function at the CS pin (see Fig. 5) will only work
with over-current events that occur during the LO on-time.
If the over-current faults are not consecutive, then the
internal fault counter will count back down each cycle
when there is no fault present. Should an over-current
fault occur only for a few cycles and then not occur again,
the counter will eventually count back down to zero. The
over-current fault counter is enabled during preheat and
ignition modes and disabled during run mode. During run
mode, the IC will enter fault mode after a single over-
current event at the CS pin.
II. PFC Section
Functional Description
In most electronic ballasts it is necessary to have the
circuit act as a pure resistive load to the AC input line
voltage. The degree to which the circuit matches a pure
resistor is measured by the phase shift between the input
voltage and input current and how well the shape of the
input current waveform matches the shape of the
sinusoidal input voltage. The cosine of the phase angle
between the input voltage and input current is defined as
the power factor (PF), and how well the shape of the input
current waveform matches the shape of the input voltage
is determined by the total harmonic distortion (THD). A
power factor of 1.0 (maximum) corresponds to zero
phase shift and a THD of 0% represents a pure sinewave
(no distortion). For this reason it is desirable to have a
high PF and a low THD. To achieve this, the IRS2166D
includes an active power factor correction (PFC) circuit
which, for an AC line input voltage, produces an AC line
input current.
The control method implemented in the IRS2166D is for a
boost-type converter (Fig. 6) running in critical-conduction
mode (CCM). This means that during each switching
cycle of the PFC MOSFET, the circuit waits until the
inductor current discharges to zero before turning the
PFC MOSFET on again. The PFC MOSFET is turned on
and off at a much higher frequency (>10 kHz) than the
line input frequency (50 Hz to 60 Hz).
LPFC
CBUS
+
(+)
(-)
MPFC
DPFC
DC Bus
Fig. 6:
Boost-type PFC circuit
LO
CS
50 Pulses
Preheat or Ignition Mode
Fault Mode
2.0V
Fig. 5:
CS & LO Waveforms
When the switch M
PFC
is turned on, the inductor L
PFC
is
connected between the rectified line input (+) and (-)
causing the current in L
to charge up linearly. When
M
PFC
is turned off, L
PFC
is connected between the rectified
line input (+) and the DC bus capacitor C
BUS
(through
diode D
PFC
) and the stored current in L
PFC
flows into C
BUS
.
As M
PFC
voltage on C
BUS
charges up to a specified voltage. The
feedback loop of the IRS2166D regulates this voltage to a
fixed value by continuously monitoring the DC voltage
and adjusting the on-time of M
PFC
accordingly. For an
increasing DC bus the on-time is decreased, and for a
decreasing DC bus the on-time is increased. This
negative feedback control is performed with a slow loop
speed and a low loop gain such that the average inductor
current smoothly follows the low-frequency line input
voltage for high power factor and low THD. The on-time
of M
PFC
therefore appears to be fixed (with an additional
modulation to be discussed later) over several cycles of
the line voltage. With a fixed on-time, and an off-time
determined by the inductor current discharging to zero,
the result is a system where the switching frequency is
free-running and constantly changing from a high
frequency near the zero crossing of the AC input line
voltage, to a lower frequency at the peaks (Fig. 7).
V, I
t
Fig. 7:
Sinusoidal line input voltage (solid line), triangular
PFC inductor current and smoothed sinusoidal line input
current (dashed line) over one half-cycle of the line input
voltage
When the line input voltage is low (near the zero
crossing), the inductor current will charge up to a small
amount and the discharge time will be fast resulting in a
high switching frequency. When the input line voltage is
high (near the peak), the inductor current will charge up to
a higher amount and the discharge time will be longer
giving a lower switching frequency. The triangular PFC
inductor current is then smoothed by the EMI filter to
produce a sinusoidal line input current.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IRS2166DSPBF | PFC + BALLAST CONTROL IC |
| IRS2166DSTRPBF | PFC + BALLAST CONTROL IC |
| IRS2168DPBF | ADVANCED PFC + BALLAST CONTROL IC |
| IRS2168DSPBF | ADVANCED PFC + BALLAST CONTROL IC |
| IRS2168DSTRPBF | ADVANCED PFC + BALLAST CONTROL IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IRS2166DPBF | 制造商:International Rectifier 功能描述:MOSFET Driver IC |
| IRS2166DSPBF | 功能描述:功率驅(qū)動(dòng)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(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS2166DSPBF | 制造商:International Rectifier 功能描述:MOSFET Driver IC |
| IRS2166DSTRPBF | 功能描述:功率驅(qū)動(dòng)器IC PFC & Ballast Cntrl IC 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(shí)間: 下降時(shí)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。