參數(shù)資料
型號: LT3467
廠商: Linear Technology Corporation
英文描述: 1A Low Noise High Current LED Charge Pump with Independent Torch/Flash Current Control
中文描述: 第1A低噪聲大電流LED的獨(dú)立火炬電荷泵/閃光電流控制
文件頁數(shù): 4/12頁
文件大?。?/td> 102K
代理商: LT3467
LTC 3216
4
3216fa
V
IN
(V)
2.8
E
100
90
80
70
60
50
40
30
20
10
0
3.2
3.6
3.8
3216 G11
3.0
3.4
4.0
4.2
4.4
LED = LXCL-PWF1 LUMILEDS
3216 G12
3216 G13
V
50mV/DIV
A/C COUPLED
500ns/DIV
V
20mV/DIV
A/C COUPLED
500ns/DIV
V
IN
= 3.6V
I
CPO
= 200mA
V
IN
= 3.6V
I
CPO
= 400mA
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
I
μ
A
3216 G04
INPUT VOLTAGE (V)
2.9
4.5
3.3
3.7
4.1
3.1
3.5
3.9
4.3
T
A
= 85
°
C
T
A
= –40
°
C
T
A
= 25
°
C
F
930
920
910
900
890
880
870
860
850
840
3216 G03
SUPPLY VOLTAGE (V)
2.9
4.5
3.3
3.7
4.1
3.1
3.5
3.9
4.3
T
A
= 85
°
C
T
A
= –40
°
C
T
A
= 25
°
C
600mA
I
LED
= 800mA
400mA
200mA
1ms/DIV
EN2
5V/DIV
I
500mA/DIV
V
1V/DIV
3216 G14
V
IN
= 3V
I
LED
CURRENT(mA)
0
C
200
400 500
900
3216 G15
100
300
600 700 800
3400
3350
3300
3250
3200
3150
3100
T
A
= 85
°
C
T
A
= –40
°
C
T
A
= 25
°
C
TYPICAL PERFOR A CE CHARACTERISTICS
U
Efficiency vs V
IN
1.5x Mode CPO Output Ripple
2x Mode CPO Output Ripple
Input Shutdown Current
vs Input Voltage
Oscillator Frequency
vs Supply Voltage
Charge Pump Mode Switching
and Input Current
T
A
= 25
°
C unless otherwise noted.
I
SET
/I
LED
Current Ratio vs I
LED
Current
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