4

Date: 6/30/04

SP7611A/7612/7614 Low Dropout LED Driver for Any Color LED

© Copyright 2004 Sipex Corporation

TYPICAL PERFORMANCE CHARACTERISTICS

LED Current versus Enable Voltage

0.000

2.000

4.000

6.000

8.000

10.000

12.000

14.000

16.000

18.000

VEN Voltage (V)

ILED vs Set Resistor and Cathode Voltage

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

20.0

10

20

30

40

50

60

70

80

90

100

Set Resistor (kOhms)

Vk=50mV

Vk=100mV

Vk=150mV

Vk=200mV

Vk=250mV

Vk=300mV

PWM LED Current vs. Temperature

21

22

23

24

25

-40 -30 -20 -10

0

10

20

30

40

50

60

70

80

Temperature (C)

Iset=100uA, Vcathode=150mV

T

T

[]

T

Time (1µs/div)

T

T

[]

T

Time (1µs/div)

Enable Voltage Transient Response

Control Voltage Transient Response

SP7614 LED Current vs. LED Cathode Voltage

5

10

15

20

25

30

35

0

0.2

0.4

0.6

0.8

1

LED Cathode Voltage (V)

For Iset = 25uA

For Iset = 50uA

ISET versus CTRL Voltage

0.0

20.0

40.0

60.0

80.0

100.0

120.0

140.0

160.0

180.0

200.0

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

CTRL Pin Voltage (V)

Vk=1V

Vk=150mV