SC4509 Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Fabricante
SC4509
Semtech Corporation
SC4509 Datasheet PDF : 15 Pages
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SC4509
POWER MANAGEMENT
Typical Characteristics (Cont.)
EN/SS Input Current vs. EN/SS Voltage vs. Temperature,
VIN = 3.6V; VOUT = 16V
55.0
50.0
45.0
40.0
25°C
35.0
30.0
40°C
25.0
20.0
15.0
85°C
10.0
5.0
0.0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
VEN/SS (Volts)
PRELIMINARY
Output Voltage vs. EN/SS Voltage vs. Temperature,
VIN = 3.6V; VOUT = 16V
16.0
14.0
40°C
12.0
25°C
10.0
85°C
8.0
6.0
4.0
2.0
0.0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
3.6
4.0
VEN/SS (Volts)
22
20
18
16
14
12
10
8
6
15
800
700
600
LED Current vs. PWM Dimming Duty Cycle
VIN = 3.6V; VOUT = 16V; FPWM = 10kHz
25
35
45
55
65
75
85
95
DTY (%)
Switch Current Limit vs. Complementary
Duty Cycle (1-D) vs. Temperature
-40°C
500
0°C
400
25°C
300
85°C
200
100
0
10
20
30
40
50
60
70
80
90
100
(1-D) (%)
© 2007 Semtech Corp.
10
LED Current vs. PWM Dimming Duty Cycle
VIN = 3.6V; VOUT = 16V; FPWM = 1kHz
22
20
18
16
14
12
10
8
6
4
2
0
0
10
20
30
40
50
60
70
80
90
100
DTY (%)
Switch Current Limit vs. Temperature vs.
Complementary Duty Cycle (1-D)
700
650
10%
20%
600
550
500
450
60%
400
90%
350
300
40%
250
200
-40
-20
0
20
40
60
Temperature (Deg. C)
80
100
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