參數資料
型號： 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： 19/25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
19
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
INDUCTOR DESIGN
(continued)
Step 2:
Choose a core with higher K
g
than the one calculated in
Step 1.
A
W
A
E
l
W
K
g
/core = k
where:
k
A
W
≡
Bobbin window area
A
E
≡
Effective core area
l
W
≡
Mean length per turn
≡
Winding coefficient (typ. k=0.4)
K
g
factor for TDK PQ2625:
A
W
= 47.7mm
2
A
E
= 118mm
2
l
W
(47.7) (118)
2
= 56.2mm
K
g
= 0.4
(mm)
5
= 4.7 * 10
-12
m
5
2
56.2
Step 3:
Determine number of turns.
L I
LP
B A
E
450 * 10
-6
* 2.4
0.15 * 118 * 10
-6
N =
N =
= 61 turns
A
WIRE
= k
= 0.4
= 0.31mm
2
= 480mil
2
choose #22 AWG with r = 0.0165
/feet resistance.
R
W
= N * l
w
* r
R
W
= 0.185
A
W
N
47.7
61
Step 4:
Calculate air gap.
l
g
=
l
q
=
= 0.122cm = 48 mil
μ
O
N
2
A
E
L
4
π
*
10
-7
*
(61)
2
*
118
*
10
-6
450
*
10
-6
CURRENT SENSE RESISTOR
Current sense resistor, R6 is selected using the minimum multi-
plier output clamp voltage and the maximum inductor peak
current such that:
V
CLAMP(MIN)
I
L (MAX)
2.4
R6 =
=
= 0.45
Power dissipation is approximated by:
1
6
1
6
P
R
≈
I
2 (MAX)
2
(1 - D'
MIN
),
where D'
MIN
= 1 -
P
R
≈
(2.4)
2
(1 - 0.61) = 0.374
Select
THREE
1.3
, W carbon comp resistors in parallel.
1.1
√
2 V
AC(MIN)
V
BOOST
R2
R1 + R2
MULTIPLIER COMPONENT SELECTION
Calculate R1 & R2 resistor values such that under low line AC input
the multiplier output is lower than the minimum clamp voltage.
*
√
2 V
AC (MIN)
* K * (V
EA0 (MAX)
- V
REF
) < V
CLAMP (MIN)
where: K
≡
Mult. Gain
V
EA)(MAX)
≡
Maximum error amp output where
multiplier is still in linear range.
This voltage is
≈
3.5V.
For K = 0.65 & V
CLAMP (MIN)
= 1.1V, the ratio of R1/R2 is:
R1
R2
> 83
Assuming R1 is selected to be:
* R1 = 2.2M (1%)
R2 =
=
26.4k (1%)
select
R
2
= 26.7k (1%)
* For high input applications such as 277V, R1 must be divided
into two resistors in series to meet the maximum rated voltage of
the resistors.
To improve THD further (typ. 2-3%), a high value resistor can
be connected from the supply voltage to this pin to allow an
increase in the switch on-time at the zero crossing by adding an
effective offset at the multiplier output.
ERROR AMPLIFIER COMPONENT SELECTION
Boost voltage is programmed with R7 & R8 resistor dividers using
the following equation:
V
BOOST
V
REF
=
-1,
assuming that the product of R7 and the E.A. input bias current
does not cause significant error in the output voltage setting.
Assuming
R7 = 1M
(for output voltage of higher than 250V,
two resistors may be added in series to meet the voltage
requirement of the resistor.)
V
ERROR
(10
6
) (0.5 * 10
-6
) = 0.5V,
which is < 0.25% of the
output voltage.
Calculating R8:
R8 =
=
11k (1%)
Worst case output tolerance is the total of ±3.75% which is the sum
of ±1.5% (Ref), ±2% (resistor dividers), and ±0.25% (E.A. input
bias current).
R7
R8
R7
V
BOOST
V
REF
- 1
2.2M
83
相關PDF資料
PDF描述
LX1563 SECOND-GENERATION POWER FACTOR CONTROLLER
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LX1563IDMT Power Factor Controller
LX1563IDM SECOND-GENERATION POWER FACTOR CONTROLLER
LX1563IM SECOND-GENERATION POWER FACTOR CONTROLLER
相關代理商/技術參數
參數描述
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（功率因數修正） 系列:- 產品培訓模塊:GreenChip Synchronous Rectification Control Family of ICs 標準包裝:1 系列:- 模式:間歇導電（DCM） 頻率 - 開關:- 電流 - 啟動:- 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） 供應商設備封裝: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（功率因數修正） 系列:- 產品培訓模塊:GreenChip Synchronous Rectification Control Family of ICs 標準包裝:1 系列:- 模式:間歇導電（DCM） 頻率 - 開關:- 電流 - 啟動:- 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） 供應商設備封裝: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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