PAM2804 Datasheet, PDF (5/11 Pages) Power Analog Micoelectronics – 1A Step-Down Constant Current, High Efficiency LED Driver

PAM2804
1A Step-Down Constant Current, High Efficiency LED Driver
Typical Performance Characteristics
T_A =25°C, C_IN =10μF, C_O =10μF, L=4.7μH, unless otherwise noted.
Eifficiency VS Input Voltage
96%
94%
92%
90%
88%
86%
84%
330m A
750m A
1A
82%
3
3 .5
4
4.5
5
5 .5
6
Input Volt age (V)
Output Current VS Input Voltage
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1 _Rcs=0.135ohm
0
3
3.5
4
4.5 5
5.5
6
Input Voltage (V)
Rdson VS Input Voltage
0.4
0.35
Output Current VS Input Voltage
350
300
250
200
150
100
50
0
2.5
3
3.5
Rcs=0.3ohm
4
4.5
5
5.5
6
Vin(V)
Output Current VS Input Voltage
1200
1000
800
600
400
200
Rcs=0.1ohm
0
2.5 3 3.5 4 4.5 5 5.5 6
Vin(V)
Rdson VS Temperature
0.6
Vin=3.6V
0.5
0.3
0.4
0.25
0.3
0.2
0.15
0.1
2
3
4
5
6
Input Voltage
0.2
0.1
0
20
Vin =4.2V
Vin =3.6V
Vin =2.7V
70
120
Temper ature(℃)
Power Analog Microelectronics, Inc
www.poweranalog.com
5
10/2010 Rev1.0