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參數(shù)資料
| 型號： | IRS2168DPBF |
| 廠商： | 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 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 313K |
| 代理商： | IRS2168DPBF |
IRS2168D(S)PbF
www.irf.com Page 17
When this occurs, V
is discharged internally to UVLO.
The IRS2168D enters UVLO mode and both the PFC and
ballast sections are disabled. The start-up supply resistor
to V
, together with the micro-power start-up current,
should be set such that the ballast turns on at an AC line
input voltage above the level at which the DC bus begins
to drop. The current-sensing resistor at the OC pin sets
the maximum PFC current and therefore sets the
maximum on-time of M
. This prevents saturation of
the PFC inductor and programs the minimum low-line
input voltage for the ballast. The micro-power supply
resistor to V
and the current-sensing resistor at the OC
pin program the on and off input line voltage thresholds
for the ballast. With these thresholds correctly set, the
ballast will turn off due to the 3.0 V undervoltage
threshold (V
) on the V
pin, and on again at a
higher voltage (hysterisis) due to the supply resistor to
V
CC
.
III. Ballast Design Equations
Note: The results from the following design equations can
differ slightly from actual measurements due to IC tol-
erances, component tolerances, and oscillator over- and
under-shoot due to internal comparator response time.
Step 1: Program Run Frequency
The run frequency is programmed with the timing resistor
R
at the FMIN pin. Use graph in Fig. 16 (R
vs.
Frequency) to select R
FMIN
value for desired run
frequency.
0
20
40
60
80
100
120
140
10
20
30
40
50
R
FMIN
(kW)
F
Figure 16:
f
OSC
vs R
FMIN
Step 2: Program Preheat Frequency
The preheat frequency is programmed with timing
resistors R
and R
. The timing resistors are
connected in parallel for the duration of the preheat time.
Use graph in Fig. 14 (R
vs. Frequency) to select
R
value for desired preheat frequency. Then R
PH
is
given as:
R
R
R
EQUIV
FMIN
EQUIV
R
FMIN
PH
R
=
[
] (1)
Step 3: Program Preheat Time and Ignition Time
The preheat time is defined by the time it takes for the
external capacitor on pin C
to charge up to V
CPHEOP+
. An
external resistor (R
) connected to V
capacitor C
PH
. The preheat time is therefore given as:
C
R
t
≈
or
t
C
≈
[F] (3)
PH
CPH
PH
[s]
(2)
CPH
R
PH
PH
The ignition time is defined by the time it takes for the
external capacitor on pin C
to charge up the second
time from V
CPHSOI-
to V
CPHRUN
. The ignition time is therefore
given as:
t
t
≈
4
[s] (4)
Step 4: Program Ignition Ramp Time
The ignition ramp time is defined by the time it takes for
the external capacitor on pin VCO to charge up to 2 V.
The external timing resistor (R
) connected to F
charges capacitor C
VCO
. The ignition ramp time is
therefore given as:
C
R
t
=
[s]
or
t
C
≈
[F] (6)
PH
IGN
VCO
PH
RAMP
(5)
PH
RAMP
R
VCO
Step 5: Program Maximum Ignition Current
The maximum ignition current is programmed with the
external resistor R
CS
and an internal threshold of 1.2 V
(V
). This threshold determines the over-current limit
of the ballast, which will be reached when the frequency
ramps down towards resonance during ignition and the
lamp does not ignite. The maximum ignition current is
given as:
2
≈
CS
IGN
R
I
[A] (peak)
(7)
or
IGN
CS
I
R
2
≈
[
] (8)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IRS2168DSPBF | ADVANCED PFC + BALLAST CONTROL IC |
| 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:   |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IRS2168DSPBF | 功能描述:功率驅(qū)動器IC ADVANCED PFC BALLAST CTRL 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS2168DSPBF | 制造商:International Rectifier 功能描述:MOSFET Driver IC |
| IRS2168DSTRPBF | 功能描述:功率驅(qū)動器IC Advanced 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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| IRS2181 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:HIGH AND LOW SIDE DRIVER |
| IRS21814 | 制造商:IRF 制造商全稱:International Rectifier 功能描述:HIGH AND LOW SIDE DRIVER |
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