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HT7937 데이터시트(PDF) 6 Page - Holtek Semiconductor Inc

부품명 HT7937
상세설명  Built-in OVP White LED Step-up Converter
PDF  13 Pages
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제조업체  HOLTEK [Holtek Semiconductor Inc]
홈페이지  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT7937 데이터시트(HTML) 6 Page - Holtek Semiconductor Inc

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Typical Performance Characteristics
HT7937
Rev 1.10
6
January 18, 2010
60
65
70
75
80
85
90
0
5
10
15
20
LED Current (mA)
VIN=3V
VIN=3.5V
VIN=4V
L: 10uH, SR0602 10ML (ABC Electronics Corp.)
D1: 1N5819
C1, C2: 1uF
VIN=5V
5 WLEDs Efficiency vs. LED Current
60
65
70
75
80
85
90
0
5
10
15
20
LED Current (mA)
VIN=3V
VIN=3.5V
VIN=4V
VIN=5V
L: 10uH, SR0602 10ML (ABC Electronics Corp.)
D1: 1N5819
C1, C2: 1uF
3 WLEDs Efficiency vs. LED Current
85
87
89
91
93
95
97
99
101
103
105
-45
-30
-15
0
15
30
45
60
75
90
Temperature (
)
3WLEDs, VIN=3V
L: 10uH, SR0602 10ML(ABC Electronics Corp.)
D1: 1N5819
C1, C2: 1uF
Temperature VS Reference Voltage
85
86
87
88
89
90
91
92
93
94
95
-45
-30
-15
0
15
30
45
60
75
90
Temperature (
)
3WLEDs, VIN=3V
L: 10uH, SR0602 10ML(ABC Electronics Corp.)
D1: 1N5819
C1, C2: 1uF
Temperature VS Switching Duty Cycle
85
87
89
91
93
95
97
99
101
103
105
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
3WLEDs, VIN=3V
L: 10uH, SR0602 10ML(ABC Electronics Corp.)
D1: 1N5819
C1, C2: 1uF
Input Voltage VS Reference Voltage
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-45
-30
-15
0
15
30
45
60
75
90
Temperature (
)
3WLEDs, VIN=3V
L: 10uH, SR0602 10ML(ABC Electronics Corp.)
D1: 1N5819
C1, C2: 1uF
Temperature VS Switching Frequency



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