PAM2701 Datasheet, PDF (7/14 Pages) Power Analog Micoelectronics – 4-Channel Regulated Charge Pump White LED Driver

PAM2701
4-Channel Regulated Charge Pump White LED Driver
Typical Characteristics
7. Output Voltage vs Input Voltage
7
6
1.5X Mode
5
4
3
2
1X Mode
1
0
2.8
3.1
3.4
3.7
4
4.3
Input Voltage (V)
9. LED Current Setting Using the External
Resistor R_SET
LED Current vs R_SET Resistance
35
30
25
20
15
10
5
0
0
100 200 300 400 500 600
RRS_SE_ETT Resistance (KΩ)
8. Output Resistance vs Input Voltage
4.5
4
3.5
1.5X Mode，IO=100mA
3
2.5
1X Mode，IO=100mA
2
1.5
1
2.8
3.1
3.4
3.7
4
4.3
Input Voltage (V)
10.LED Current Setting Using a DC Voltage
to RSET Pin
LED Current vs Analog Control Voltage
35
30
25
20
15
10
5
0
0
0.3
0.6
0.9
1.2
Analog Control Voltage (V)
11.LED Current Setting Using a PWM Signal to EN Pin
LED Current vs Duty Cycle @ f=100Hz
35
LED Current vs Duty Cycle @ f=1KHz
35
30
30
25
VIN=3.2V
20
25
VIN=3.2V
20
15
15
10
VIN=4.2V
10
5
5
VIN=4.2V
0
0
20
40
60
80
100
PWM Duty Cycle (%)
0
0
20
40
60
80
100
PWM Duty Cycle (%)
Power Analog Microelectronics,Inc
www.poweranalog.com
7
09/2008 Rev 1.3