MAX16823
High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
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Pin Description
PIN
TQFN TSSOP
NAME FUNCTION
1 3 DIM1
D i m m i ng Inp ut 1. D IM 1 i s a l ow - fr eq uency d i m m i ng i np ut for channel 1. A l og i c- l ow tur ns off
O U T1 and a l og i c- hi g h tur ns on O U T1.
2 4 DIM2
D i m m i ng Inp ut 2. D IM 2 i s a l ow - fr eq uency d i m m i ng i np ut for channel 2. A l og i c- l ow tur ns off
O U T2 and a l og i c- hi g h tur ns on O U T2.
3 5 DIM3
D i m m i ng Inp ut 3. D IM 3 i s a l ow - fr eq uency d i m m i ng i np ut for channel 3. A l og i c- l ow tur ns off
O U T3 and a l og i c- hi g h tur ns on O U T3.
4 6 LEDGOOD
Open LED Output. LEDGOOD is an open-drain output. A logic-high indicates the LED
connection i s g ood i n al l thr ee channel s. A l og i c- l ow i nd i cates an op en LE D connecti on. S ee the
LE D GO OD secti on.
5, 6, 7 7, 8, 9 IN
P osi ti ve Inp ut S up p l y. Byp ass w i th a 0.1µF ( m i n) cap aci tor to G N D . C onnect al l IN
p i ns tog ether .
810LGC
LE D D etecti on- Ti m i ng S etti ng . C onnect a cap aci tor fr om LGC to g r ound to set the d el ay ti m e
for LE D G OO D .
9 11 REG 3.4V V ol tag e Reg ul ator . C onnect a 0.1µF cap aci tor fr om RE G to G N D .
10 12 GND G r ound
11 13 CS3
C hannel 3 S ense Am p l i fi er P osi ti ve Inp ut. C onnect the cur r ent- sense r esi stor b etw een C S 3
and G N D to p r og r am the outp ut cur r ent l evel for channel 3.
12 14 CS2
C hannel 2 S ense Am p l i fi er P osi ti ve Inp ut. C onnect the cur r ent- sense r esi stor b etw een C S 2
and G N D to p r og r am the outp ut cur r ent l evel for channel 2.
13 15 CS1
C hannel 1 S ense Am p l i fi er P osi ti ve Inp ut. C onnect the cur r ent- sense r esi stor b etw een C S 1
and G N D to p r og r am the outp ut cur r ent l evel for channel 1.
14 16 OUT3 C ur r ent Reg ul ator O utp ut 3
15 1 OUT2 C ur r ent Reg ul ator O utp ut 2
16 2 OUT1 C ur r ent Reg ul ator O utp ut 1
EP EP EP
E xp osed P ad . C onnect E P to a l ar g e- ar ea g r ound p l ane for effecti ve p ow er d i ssi p ati on. D o not
use as the IC g r ound connecti on.
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