參數(shù)資料
型號(hào)： IRS2168DSPBF
廠(chǎng)商： International Rectifier
英文描述： ADVANCED PFC + BALLAST CONTROL IC
中文描述： 先進(jìn)PFC的鎮(zhèn)流器控制IC
文件頁(yè)數(shù)： 12/21頁(yè)
文件大?。?/td> 313K
代理商： IRS2168DSPBF
IRS2168D(S)PbF
www.irf.com Page 12
Preheat Mode (PH)
The IRS2168D enters preheat mode when V
exceeds
the UVLO positive-going threshold (V
). The internal
MOSFET that connects pin CPH to COM is turned off and
an external resistor (Fig. 3) begins to charge the external
preheat timing capacitor (C
). LO and HO begin to
oscillate at a higher soft-start frequency and ramp down
quickly to the preheat frequency. The VCO pin is
connected to COM through an internal
FMIN
VCO
CPH
COM
LO
MLS
OSC.
HO
MHS
VS
Half-
Bridge
Output
I
LOAD
V
BUS
(+)
V
BUS
(-)
Load
Return
Half-
Bridge
Driver
IRS2168D
M1
R
PH
R
FMIN
C
VCO
C
PH
VCC
R
CPH
4
3
5
MODE
16
15
11
10
CS
12
R
CS
C
CS
R
3
Figure 3:
Preheat circuitry
MOSFET M1 so the preheat frequency is determined by
the equivalent resistance at the FMIN pin formed by the
parallel combination of resistors R
and R
. The
frequency remains at the preheat frequency until the
voltage on pin C
exceeds approvixmately 2/3*V
(V
) and the IC enters Ignition Mode. During
preheat mode, the over-current protection on pin CS and
the 65-cycle (n
) consecutive over-current fault
counter are both enabled. The PFC circuit is working in
high-gain mode (see PFC section) and keeps the DC bus
voltage regulated at a constant level.
Ignition Mode (IGN)
The IRS2168D ignition mode is defined by the second
time C
PH
charges from 1/3*V
(V
) to 2/3*V
(V
). When the voltage on pin CPH exceeds
2/3*V
(V
) for the first time, pin CPH is discharged
quickly through an internal MOSFET down to 1/3*V
(V
I
) (see Figs. 4 and 5). The internal MOSFET
turns off and the voltage on pin C
begins to increase
again. The internal MOSFET M1 at pin V
CO
turn
off and resistor R
is disconnected from COM. The
equivalent resistance at the FMIN pin increases from the
parallel combination (R
//R
) to R
at a rate
programmed by the external capacitor at pin VCO (C
)
and resistor R
. This causes the operating frequency to
ramp down smoothly from the preheat frequency through
the ignition frequency to the final run frequency. During
this ignition ramp, the frequency sweeps through the
resonance frequency of the lamp output stage to ignite
the lamp.
2/3*V
CC
t
V
CPH
t
PH
= R
CPH
* C
PH
1/3*V
CC
IGNITION
RUN
PREHEAT
2V
V
VCO
t
RAMP
= R
PH
* C
VCO
t
Figure 4:
C
PH
and VCO timing diagram
FMIN
VCO
CPH
COM
LO
MLS
OSC.
HO
MHS
VS
Half-
Bridge
Output
I
LOAD
V
BUS
(+)
V
BUS
(-)
Load
Half-
Bridge
Driver
IRS2168D
M1
R
PH
R
FMIN
C
VCO
C
PH
VCC
R
CPH
4
3
5
MODE
16
15
11
10
CS
12
R
CS
C
CS
R
3
+
-
1.25V
IGN.
REG.
Figure 5:
Ignition circuitry
The over-current threshold on pin CS will protect the
ballast against a non-strike or open-filament lamp fault
condition. The voltage on pin CS is defined by the lower
half-bridge MOSFET current flowing through the external
current sensing resistor R
. This resistor programs the
maximum peak ignition
current (and therefore peak
相關(guān)PDF資料
PDF描述
IRS2168DSTRPBF ADVANCED PFC + BALLAST CONTROL IC
IRS21853SPBF Asynchronous SRAM; Organization (word): 256K; Organization (bit): x 16; Memory capacity (bit): 4M; Access time (ns): 12; Supply voltage (V): 3.0 to 3.6; Operating temperature (°C): 0 to 70; Package: TSOPII (44); Status:   Remarks:  
IRS21952SPBF HIGH SIDE & DUAL LOW SIDE DRIVER IC
IRS21952STRPBF Asynchronous SRAM; Organization (word): 256K; Organization (bit): x 16; Memory capacity (bit): 4M; Access time (ns): 12; Supply voltage (V): 3.0 to 3.6; Operating temperature (°C): 0 to 70; Package: TSOPII (44); Status:   Remarks:  
IRS21953SPBF HIGH SIDE & DUAL LOW SIDE DRIVER IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IRS2168DSPBF 制造商:International Rectifier 功能描述:MOSFET Driver IC
IRS2168DSTRPBF 功能描述:功率驅(qū)動(dòng)器IC Advanced PFC & Ballast Cntrl IC RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類(lèi)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
IRS2181 制造商:IRF 制造商全稱(chēng):International Rectifier 功能描述:HIGH AND LOW SIDE DRIVER
IRS21814 制造商:IRF 制造商全稱(chēng):International Rectifier 功能描述:HIGH AND LOW SIDE DRIVER
IRS21814MPBF 功能描述:功率驅(qū)動(dòng)器IC HI LO SIDE DRVR 600V 10 to 20V 1.4A RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類(lèi)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
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