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Lista de partido
LT1932ES6
Constant-Current DC/DC LED Driver in ThinSOT
Linear Technology
LT1932ES6 Datasheet PDF : 16 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
LT1932
Switch Saturation Voltage (V
CESAT
)
400
350
T
J
= 125
°
C
300
T
J
= 25
°
C
250
200
T
J
= –50
°
C
150
100
50
0
0 100 200 300 400 500 600
SWITCH CURRENT (mA)
1932 G01
LED Pin Voltage
400
350
300
250
T
J
= 125
°
C
200
T
J
= 25
°
C
150
T
J
= –50
°
C
100
50
0
0 5 10 15 20 25 30 35 40
LED CURRENT (mA)
1932 G04
Quiescent Current
2.00
1.75
1.50
V
IN
= 10V
1.25
1.00
V
IN
= 1.2V
0.75
0.50
0.25
0
– 50 – 25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1932 G07
Switch Current Limit
700
600
V
IN
= 1.2V
V
IN
= 10V
500
400
300
200
100
0
–50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1932 G02
Switching Frequency
2.0
1.8
1.6
1.4
V
IN
= 10V
1.2
1.0
V
IN
= 1.2V
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1932 G03
LED Current
50
45
R
SET
= 562
Ω
40
35
R
SET
= 750
Ω
30
25
20
R
SET
= 1.50k
15
10
R
SET
= 4.53k
5
0
– 50 – 25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1932 G05
LED Current
50
45
R
SET
= 562
Ω
40
35
R
SET
= 750
Ω
30
25
20
R
SET
= 1.50k
15
10
R
SET
= 4.53k
5
0
0
2
4
6
8
INPUT VOLTAGE (V)
10
1932 G06
SHDN Pin Current
Switching Waveforms
50
45
T
J
= –50
°
C
V
SW
10V/DIV
40
I
L1
35
200mA/DIV
30
T
J
= 25
°
C
V
OUT
20mV/DIV
25
AC COUPLED
I
LED
20
T
J
= 125
°
C
10mA/DIV
15
V
IN
= 3V
0.5
µ
s/DIV
4 WHITE LEDs
10
I
LED
= 15mA
CIRCUIT ON FIRST PAGE
5
OF THIS DATA SHEET
0
0
2
4
6
8
10
SHDN PIN VOLTAGE (V)
1932 G08
1093 G09
1932f
3
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