VCC
Q1
R1
D1
COFF
COFF
R
OFF
C
OFF
VCC
L1
Q1
D1
V
BUCK
C1
COFF
SW
(a) (b) (c)
LEDs
R
OFF
C
OFF
R
OFF
C
OFF
LM3448
SNOSB51C –SEPTEMBER 2011–REVISED MAY 2013
www.ti.com
Figure 32. COFF Current Source Circuits
22 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: LM3448
