PAM2842 Datasheet, PDF (9/17 Pages) Power Analog Micoelectronics – High Power LED Driver

PAM2842
High Power LED Driver
Typical Performance Characteristic
Fsw=300kHz, T_A=25°C, unless otherwise noted.
5. Output Current vs Input Voltage
(Sepic mode, 1W LED),
400
350
300
250
200
150
100
5*1W
4*1W
3*1W
2*1W
50
1*1W
0
5
10
15
20
Input Voltage (V)
7. Output Current vs Input Voltage
(Buck mode, 3W LED),
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
5
10 15 20
25 30 35 40
Input Voltage (V)
6. Efficiency vs Input Voltage
(Sepic mode, 1W LED),
90%
89%
88%
87%
86%
85%
84%
83%
82%
81%
5
5*1W
3*1W
1*1W
4*1W
2*1W
7
9
11
13
15
17
19
Input Voltage (V)
8. Efficiency vs Input Voltage
(Buck mode, 3W LED),
100%
95%
90%
85%
80%
75%
70%
5
1*3W
2*3W
3*3W
10 15 20 25 30 35 40
Input Voltage (V)
9. LED Current vs Duty Cycle
(PWM=100Hz, in Dimming State)
400
350
300
250
200
150
100
50
0
0
20
40
60
80
Duty Cycle (%)
10. Start up and Shutdown
Vout
EN
Vcomp
100
Power Analog Microelectronics,Inc
www.poweranalog.com
9
09/2008 Rev 1.1