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SC441AEVB 数据表(PDF) 6 Page - Semtech Corporation

部件名 SC441AEVB
功能描述  High Efficiency Integrated Driver for 4-Strings of 150mA LEDs
PDF  20 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC441AEVB 数据表(HTML) 6 Page - Semtech Corporation

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SC441A
6
© 2009 Semtech Corporation
www.semtech.com
Typical Characteristics (continued)
120
140
160
180
200
220
240
260
-40
25
105
40
45
50
55
60
65
70
75
-40
25
105
0
100
200
300
400
500
600
700
800
900
10
20
40
60
80
100
120
140
160
Temperature (oC)
OVPIN Threshold Voltage
vs. Temperature
Temperature (oC)
Temperature (oC)
I
OVPRTN = 100uA
LED Current (mA)
LED Current Source Saturation Voltage
vs. LED Current
T
A = 25
o
C
OVPRTN Saturation Voltage
vs. Temperature
FFLAG Saturation Voltage
vs. Temperature
I
FFLAG = 2mA
80
82
84
86
88
90
92
94
80
160
240
320
400
480
560
600
Efficiency ( P
BOOST_OUTPUT / PINPUT)
VIN = 12V
VIN = 5V
VIN = 21V
Boost Section Output Current (mA)
Condition: VOUT = 36V
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
0.2
0.5
1
2
5
10
20
30
40
50
PWM Dimming Minimum Pulse Width
vs. PWM Dimming Frequency
PWM Dimming Frequency (kHz)
Condition: VIN = 2V, VOUT = 30V / 20mA x 4 strings
PWM Dimming Minimum Pulse Width
vs. PWM Dimming Frequency
PWM Dimming Frequency (kHz)
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0.5
1
2
5
10
20
30
40
50
Condition: VIN = 2V, VOUT = 30V / 50mA x 4 strings
PWM Dimming Minimum Duty Cycle
vs. PWM Dimming Frequency
PWM Dimming Frequency (kHz)
Condition: VIN = 2V, VOUT = 30V / 20mA x 4 strings
0
2
4
6
8
10
12
14
16
18
20
22
0.2
0.5
1
2
5
10
20
30
40
50
PWM Dimming Minimum Duty Cycle
vs. PWM Dimming Frequency
PWM Dimming Frequency (kHz)
Condition: VIN = 2V, VOUT = 30V / 50mA x 4 strings
0
2
4
6
8
10
12
14
0.5
1
2
5
10
20
30
40
50
OVPIN
1.46
1.48
1.50
1.52
1.54
1.56
1.58
-40
25
105
VIN = 12V



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