參數(shù)資料
型號: LX1689IPW-TR
廠商: MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類: 穩(wěn)壓器
英文描述: FLUORESCENT LIGHT CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20
封裝: ROHS COMPLIANT, PLASTIC, TSSOP-20
文件頁數(shù): 14/14頁
文件大?。?/td> 296K
代理商: LX1689IPW-TR
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
Copyright
2000
Rev. 1.1, 2006-02-27
WWW
.Microse
m
i
.CO
M
LX1689
Third Generation CCFL Controller
PRODUCTION DATA SHEET
TM
TY PICAL APPLICATION
R6
120
C5
470pF 16V
R2
51.1K
1%
R3
4.99K 1%
C4
100nF 16V
C3
100nF 16V
C6
100F
10V 20%
TANT
C8
100nF
50V
C9*
2pF
C10
1.5nF
25V 5%
COG
R7
255
Ω 1%
C1
100nF 16V
C2
100nF 16V
R1
6.65
K 1%
V
BATT
GND
BRITE
ENABLE
Lamp
GND
I_R
EA_OUT
EA_IN
BRITE_OUT
I_SNS
OV_SNS
OC_SNS
V
BATT
VDD_A
VDD_P
ENABLE
BRITE_IN
BRITE_R
BRITE_C
DIV_248
DIM_MODE
DIM_CLK
AOUT
BOUT
+
3.0V < V
BATT < 5V
C7
1nF
16V
T1 SGE2697-1
MICROSEMI
1:53
LMT1410
275V
RMS ±
I
OUT = 3.5m
100kHz
Nominal 3.2V to 4.2V
N.C.
U2 FDC6305N
FAIRCHILD
*C9 PCB CAPACITOR COPPER AREAS TO EQUAL
APPROXIMATELY
342MM FOR 0.80MM THICK PCB
PCB CAP AREA FORMULA (K TYPICIALLY = 5.35)
AREA(MM) = D(mm) x C x 113097 E+9 / K
R4
10K
R5
10
VDD_A
C11
1.0uF 10V
10%
VDD_A
Enable input
Logic Level: 2.5V to 3.3V
ON: Logic 'HI' = >1.5V
OFF: Logic 'LOW' =< 0.8V
BRITE Input Control Range
(Linear DC)
Min. Brite 'LO' <= 0.50V
Max. Brite 'HI' >= 2.00V
(2.5V to 3.3V Logic PWM)
Min. Brite Pos Duty <= 1.6%
Max. Brite Pos Duty >= 92%
PWM freq 7.5Khz to 100Khz
Burst Rate Freq: 195Hz ± 4%
Alternate Maximum Lamp Current Table
Lamp current | R1 value | R7 Value
4.0mArms | 6.65K 1% | 221 1%
3.5mArms | 6.65K 1% | 255 1%
3.0mArms | 6.65K 1% | 294 1%
2.5mArms | 11.8K 1% | 200 1%
2.0mArms | 11.8K 1% | 249 1%
1.5mArms | 11.8K 1% | 332 1%
LX1689CPW
1
3
6
4
2,5
1
3
2
4,5
6
FIGURE 2 – LX1689 Typical 1W Application
DIMMING TABLE
DIM_MODE
DIM_CLK
DIMMING MODE
DIMMING POLARITY*
VDD_A
External Clock Source
External Burst
Dimming from divided
DIM_CLK input
Conventional
Floating or VDD_A/2
VDD_A
Analog Dimming
Conventional
Floating or VDD_A/2
GND
Analog Dimming
Reverse
GND
VDD_A
Internal Burst
Dimming from divided
Run Frequency
Conventional
GND
Internal Burst
Dimming from Divided
Run Frequency
Reverse
* Conventional polarity means that the lamp brightness increases with increasing voltage on the BRITE_IN pin.
Reverse polarity means that brightness decreases with increasing voltage.
AA
PP
LL
IICC
AA
TT
IIOO
NN
SS
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