點晶科技股½有限公司
SILICON TOUCH TECHNOLOGY INC.
PC112/PC113
Typical performance characteristics
R
1
=22Ω, L1=6.8µH, C1=4.7µF, C2=4.7µF, C3=1µF, Schottky diode VF=0.18, T
a
= 25
o
C
,
(unless otherwise specified)
0.89
0.88
0.87
0.86
Efficiency (%)
0.85
0.84
0.83
0.82
0.81
0.8
Efficiency (%)
Efficiency vs Load current
0.88
Efficiency vs Load current
VIN=4.2V
VIN=3.6V
0.87
VIN=4.2V
0.86
0.85
0.84
0.83
0.82
VIN=2.85V
VIN=3.6V
VIN=2.85V
2LEDs
5
10
15
20
Load current (mA)
25
30
0.81
0.8
3LEDs
5
10
15
20
Load current (mA)
25
30
0.88
0.87
0.86
Efficiency vs Load current
0.11
0.108
0.106
Feedback voltage (V)
0.104
Feedback voltage vs Load current
4x LEDs
3x LEDs
0.85
VIN=4.2V
Efficiency (%)
0.84
0.83
0.82
0.81
0.8
0.79
0.78
5
VIN=2.85V
VIN=3.6V
0.102
0.1
0.098
0.096
0.094
0.092
2x LEDs
4LEDs
10
15
20
Load current (mA)
25
30
0.09
5
10
15
20
Load current (mA)
25
30
85
Efficiency vs Temperature (High Load)
84
83
Efficiency vs Temperature (Light Load)
84
83
Efficiency (%)
VIN=2.85V
82
VIN=4.2V
Efficiency (%)
81
VIN=3.6V
80
79
78
3 WLEDs, 5mA
77
76
-40
VIN=4.2V
82
VIN=3.6V
81
VIN=2.85V
80
3 WLEDs, 25mA
79
78
-40
-20
0
20
40
60
80
Temperature (degree)
100
120
140
-20
0
20
40
60
80
Temperature (degree)
100
120
140
-5 -
Version
：
A.001
SITI [ SILICON TOUCH TECHNOLOGY INC. ]
