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參數(shù)資料
| 型號(hào)： | LX1562IM |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SECOND-GENERATION POWER FACTOR CONTROLLER |
| 中文描述： | 0.5 A POWER FACTOR CONTROLLER, PDIP8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 17/25頁 |
| 文件大小： | 443K |
| 代理商： | LX1562IM |
S
ECOND
-G
ENERATION
P
OWER
F
ACTOR
C
ONTROLLER
LX1562/1563
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
17
Copyright 1996
Rev. 1.3 12/96
P
R O D U C T I O N
D
A T A
S
H E E T
A P P L I C AT I O N I N F O R M AT I O N
TYPICAL APPLICATION
The application circuit shown in Figure 31 uses the LX1562 as the
controller to implement a boost type power factor regulator. The
I.C. controls the regulator, such that the inductor current is always
operating in a discontinuous conduction mode with no current
gaps. This mode of operation has several advantages over the
fixed frequency discontinuous conduction mode: 1) The switch-
ing frequency adjusts itself to the AC line envelope, causing a
sinusoidal current draw, 2) Since there is no current gap between
the switching cycles, the inductor voltage does not oscillate,
causing less radiated noise, 3) The lower peak inductor current
causes less power dissipation in the power MOSFET.
A set of formulas have been derived specifically for this mode,
and are used throughout the design procedure. An example with
the following specifications for the boost converter is given as:
Input Voltage Range
Output Power
Efficiency
Power Factor
Total Harmonic Distortion
-
-
-
-
-
100 to 130V RMS
80W
95% at full load
> 0.99 at full load
< 10% at full load
followed by a step by step design procedure which walks through
component selection.
V
IN
I
DET
OUT
COMP
INV
C.S.
GND
MULT
IN
L
1RF730
230V
F
5
8
7
2
1
4
6
3
E
120V
AC
22k
100k
W
2.2M
1%
1μF
250V
1
29k
1%
.01μF
1N4935
22μF
47
R5
0.1μF
1M
1%
100μF
400V
MR854
11k
1%
1.3
R9 620k
3x
1/4W
1N4148
AC+
AC-
1
1
1
0
450μH
61T #22AWG
7T
R10
4.7M
D5
R4
R3
L1
R1
C1
D1
D3
D2
D4
R2
C4
C3
C2
D7
R7
R8
C6
V
D6
C5
R6
Q1
OUTPUT VOLTAGE REQUIREMENT
Since the converter is a boost type topology, it requires the output
voltage to always be higher than the input voltage. It is
recommended to select this voltage at least 15% higher than the
maximum input voltage in order to: A) Avoid the inductor
saturation during line transience, and B) To keep the operating
frequency above the audible range at high line.
Figure 32 (next page) shows that when boost voltage is
selected near the maximum AC line, the increase in off-time could
reduce the operating frequency below the audible frequency and
cause inductor humming. In fact, Figure 32 (next page) shows
that for ±13% (100V to 130V) change in the line voltage the
optimum range of the operating frequency is when off-time duty
cycle (D') is between 0.57 and 0.75. This means that the boost
voltage needs to be 245V when selecting D' = 0.75 at maximum
AC line.
In this example, D' is chosen to be 0.8, to slightly reduce the
voltage rating of the back end DC to AC fluorescent lamp inverter.
This sets the boost voltage at:
V
O
=
= 230V
130 *
√
2
0.8
Note: Thick trace on schematic shows high-frequency, high-current path in circuit.
Lead lengths must be minimized to avoid high-frequency noise problems.
FIGURE 31
— TYPICAL APPLICATION OF THE LX1562 IN AN 80W FLUORESCENT LAMP
BALLAST WITH ACTIVE POWER FACTOR CONTROL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LX1563 | SECOND-GENERATION POWER FACTOR CONTROLLER |
| LX1562IDMT | Power Factor Controller |
| LX1563IDMT | Power Factor Controller |
| LX1563IDM | SECOND-GENERATION POWER FACTOR CONTROLLER |
| LX1563IM | SECOND-GENERATION POWER FACTOR CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX1563 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:SECOND-GENERATION POWER FACTOR CONTROLLER |
| LX1563IDM | 功能描述:IC CONTROLLER PFC 9.8V 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - PFC（功率因數(shù)修正） 系列:- 產(chǎn)品培訓(xùn)模塊:GreenChip Synchronous Rectification Control Family of ICs 標(biāo)準(zhǔn)包裝:1 系列:- 模式:間歇導(dǎo)電（DCM） 頻率 - 開關(guān):- 電流 - 啟動(dòng):- 電源電壓:8.6 V ~ 38 V 工作溫度:-20°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:Digi-Reel® 其它名稱:568-5348-6 |
| LX1563IDMT | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Power Factor Controller |
| LX1563IM | 功能描述:IC CONTROLLER PFC 9.8V 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - PFC（功率因數(shù)修正） 系列:- 產(chǎn)品培訓(xùn)模塊:GreenChip Synchronous Rectification Control Family of ICs 標(biāo)準(zhǔn)包裝:1 系列:- 模式:間歇導(dǎo)電（DCM） 頻率 - 開關(guān):- 電流 - 啟動(dòng):- 電源電壓:8.6 V ~ 38 V 工作溫度:-20°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:Digi-Reel® 其它名稱:568-5348-6 |
| LX1570 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:PHASE MODULATED AC SYNCHRONOUS SECONDARY-SIDE CONTROLLER |
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