0

50

100

150

200

250

300

350

2.5

3

3.5

4

4.5

5

5.5

6

Vin(V)

0

200

400

600

800

1000

1200

2.5

3

3.5

4

4.5

5

5.5

6

Vin(V)

0

0.1

0.2

0.3

0.4

0.5

0.6

20

70

120

Temper ature(℃)

Vin =4.2V

Vin =3.6V

Vin =2.7V

5

,

Power Analog Microelectronics Inc

www.poweranalog.com

PAM2804

1A Step-Down Constant Current, High Efficiency LED Driver

Typical Performance Characteristics

°C

T =25

, C =10 F, C =10 F, L=4.7 H, unless otherwise noted.

A

IN

O

μ

μ

μ

10/2010 Rev1.0

Eifficiency VS Input Voltage

Output Current VS Input Voltage

Output Current VS Input Voltage

Output Current VS Input Voltage

82%

84%

86%

88%

90%

92%

94%

96%

3

3.5

4

4. 5

5

5.5

6

Input Volt age (V)

330m A

750m A

1A

Rcs=0.3ohm

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

3

3.5

4

4.5

5

5.5

6

Input Voltage (V)

R

VS Input Voltage

dson

Rdson VS Temperature

0.1

0.15

0.2

0.25

0.3

0.35

0.4

2

3

4

5

6

Input Voltage

Rcs=0.135ohm

Rcs=0.1ohm

Vin=3.6V