TLC5921

LED DRIVER

SLLS390 – SEPTEMBER 1999

11

POST OFFICE BOX 655303

PRINCIPLES OF OPERATION

constant output current

50

0

Ilkg – Input Leakage Current – (mA)

100000

1000

10

20

30

40

60

70

80

100

10000

66000

13200

6000

2750

1800

1300

860

1040

730

640

Conditions : VO = 1 V, Vref = 1.3 V

NOTE: The resistor, R(IREF), should be located as close to IREF terminal as possible to avoid the noise influence.

Figure 5. Current on Constant Current Output vs External Resistor