LED

LED

I

V

V

R

5

-

=

C

IN

2.2 F

m

C

PUMP

0.22 F

m

3.3Vto

4.2V

C

OUT

2.2 F

m

R

LED

GND

Enable

REG71050

REG710-5

LED

LED

R

R

REG71050, REG71055, REG710

SBAS221H – DECEMBER 2001 – REVISED OCTOBER 2015

www.ti.com

9.3.3 Driving LEDs

Figure 23. REG710 Circuit for Driving LEDs

The REG710 family can be used to drive LEDs. The feed forward voltage of the chosen LED determines the

required output voltage. In this application, the charge pump can drive multiple LEDs up to 60 mA in total.

(2)

16

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Product Folder Links: REG71050 REG71055 REG710