NCP5050(2007) 查看數據表（PDF） - ON Semiconductor
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NCP5050 Datasheet PDF : 14 Pages
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NCP5050
TYPICAL OPERATING CHARACTERISTICS
1000
1200
800
Vin = 4.2 V
600
Vin = 3.8 V
400 Vin = 3.3 V
200
Operating Area
0
5
10
15
20
25
Vout (V)
Figure 4. Maximum Output Current Available
vs. Vout
90
1000
800
2 LEDs
600
3 LEDs
4 LEDs
400
5 LEDs
200
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Vin (V)
Figure 5. Typical Maximum Output Current vs.
Input Voltage, L = TDK VLF5014A-2R7M1R5
(Note 13)
90
80
Vin = 5.0 V
Vin = 4.2 V
70
Vin = 3.7 V
60
Vin = 3.3 V
80
Vin = 5.0 V
70
Vin = 4.2 V
60
Vin = 3.7 V
Vin = 3.3 V
50
10
100
1000
Iout (mA)
Figure 6. Efficiency vs. Current @ 2 LEDs
(7.0 V @ 350 mA),
L = TDK VLF5014A-2R7M1R5, (Notes 13 and 14)
90
50
10
100
1000
Iout (mA)
Figure 7. Efficiency vs. Current @ 3 LEDs
(10.5 V @ 350 mA),
L = TDK VLF5014A-2R7M1R5, (Notes 13 and 14)
90
80
Vin = 5.0 V
70
Vin = 4.2 V
Vin = 3.3 V
60
Vin = 3.7 V
80
Vin = 5.0 V
70
Vin = 4.2 V
60
Vin = 3.7 V
Vin = 3.3 V
50
10
100
1000
Iout (mA)
Figure 8. Efficiency vs. Current @ 4 LEDs
(14 V @ 350 mA),
L = TDK VLF5014A-2R7M1R5, (Notes 13 and 14)
50
10
100
1000
Figure 9. Efficiency vs. Current @ 5 LEDs
(17.5 V @ 350 mA),
L = TDK VLF5014A-2R7M1R5 (Notes 13 and 14)
13. Pulse of 500 ms every 3 s in Flash Mode (Current following through HCS pin).
14. Efficiency = 100 x (Number of LED stacked x VLED x ILED)/Pin.
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