PAM2701 Datasheet, PDF (6/14 Pages) Power Analog Micoelectronics – 4-Channel Regulated Charge Pump White LED Driver

PAM2701
4-Channel Regulated Charge Pump White LED Driver
Typical Characteristics
V_IN = 3.6V, EN = V ,_IN R_SET = 24kΩ, C = _IN C_O=1μF,T_A = 25°C, unless otherwise noted.
1. Efficiency vs Input Voltage (4 LEDs)
2. Efficiency vs Output Current (4 LEDs)
100
100
90
90
80
80
70
70
VIN=4.2V
60
20mA per LED
60
50 15mA per LED
50
VIN=3.2V
40
2.4
3
3.6
4.2
4.8
5.4
Input Voltage (V)
40
10
40
70
100
130
160
Output Current (mA)
3. LED Current vs Input Voltage (4 LEDs)
24
22
20
20mA per LED
18
16
14
12
15mA per LED
10
2.8
3.1
3.4
3.7
4
4.3
Input Voltage (V)
4. Supply Current vs Input Voltage (4 LEDs)
140
120
100
20mA per LED
80
60
40
15mA per LED
20
0
2.4
3
3.6
4.2
4.8
5.4
Input Voltage (V)
5. Ground Current vs Input Voltage
3.00
2.50
2.00
1.5X Mode
1.50
1.00
1X Mode
0.50
0.00
2.8
3.1
3.4
3.7
4
4.3
Input Voltage (V)
6. Oscillator Frequency vs Input Voltage
1.1
1.05
1
0.95
0.9
2.8
3.2
3.6
4
4.4
Input Voltage (V)
Power Analog Microelectronics,Inc
www.poweranalog.com
6
09/2008 Rev 1.3