LV5026MC-AH Datasheet, PDF (10/16 Pages) ON Semiconductor – LED Driver IC

LV5026MC
Bleeder current cuircuit for TRIAC dimmer
1. Operating voltage setting
ACS pin voltage set operating voltage at OUT2. ACS pin threshold volage is 3V typ.
OUT2 operating voltage is set by R1 and R2. R1 and R2 is determined below.
ACS
=
Vac
×
R2
R1+R2
2. Bleeder current setting
Rd set hold current at Triac dimmer.
Bleeder current is set at Rd depending on Triac dimmer.
a blockdiagram in outline
a blockdiagram in outline
R1
ACS
-
R2
+
VACS
(3V typ)
Rd
OUT2
VAC voltage is Low,
OUT2 is High voltage
Vac
Triac dimmer, OFF
Bleeder circuit, ON (OUT2; high)
ACS
OUT2
OUT
VACS (3V typ)
off on off on off
on min on min on
on
on
No.A2042-10/16