AP3019 查看數據表（PDF） - BCD Semiconductor
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AP3019 Datasheet PDF : 15 Pages
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WHITE LED STEP-UP CONVERTER
Typical Performance Characteristics
(VF of WLED is 3.45V @ IF=20mA, unless otherwise noted )
Preliminary Datasheet
AP3019
85
84
83
82
81
80
-50
V =3.6V, I =20mA, 4LEDS
IN
OUT
C =1µF, C =0.22µF, L=22µH
IN
OUT
-25
0
25
50
75
100
Junction Temperature (oC)
85
84
83
82
81
80
2.5
I =20mA, 4LEDS, T =25OC
OUT
A
C =1µF, C =0.22µF, L=22µH
IN
OUT
3.0
3.5
4.0
4.5
5.0
Input Voltage (V)
Figure 4. Efficiency vs. Junction Temperature
Figure 5. Efficiency vs. Input Voltage
85
350
300
84
250
83
200
150
82
100
V =3.6V, I =20mA, T =25OC
81
IN
OUT
A
C =1µF, C =0.22µF, L=22µH
IN
OUT
50
80
0
2
3
4
5
0
200
400
600
800
1000
LEDS (PCS)
Schottky Forward Drop (mV)
Figure 6. Efficiency vs. LED's Number
Figure 7. Schottky Forward Current
vs. Schottky Forward Drop
Apr. 2007 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
6
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