Kingbor Technology Co.,Ltd
KB4312
TEL:(86)0755-26508846 FAX:(86)0755-26509052
TYPICAL PERFORMANCE CHARACTERISTICS
Switching Frequency
Quiescent Current
SHDN Pin Bias Current
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
400
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50qC
350
300
100qC
25qC
SHDN = 10V
250
200
150
100
50
SHDN = 3.6V
SHDN = 2.7V
SHDN = 3V
0
0
2
4
6
8
–25
0
50
C)
75
100
50
C)
100
–50
25
–50
–25
0
25
75
V
(V)
IN
TEMPERATURE
(
q
TEMPERATURE
(
q
Feedback Bias Current
Efficiency vs Temperature
Current Limit vs Duty Cycle
350
300
250
200
150
100
50
60
50
40
30
85
V
3
=
3.6V
IN
LEDs
ILED
=
20mA
84
83
82
81
80
ILED
=
=
15mA
10mA
ILED
20
10
0
0
–50
0
20
40
60
80
100
50
TEMPERATURE (qC)
100
–25
0
25
75
–50
0
50
C)
100
DUTY CYCLE (%)
TEMPERATURE
(
q
4
KINGBOR [ KINGBOR TECHNOLOGY CO ]
