A8503 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
A8503
Allegro MicroSystems
'A8503' PDF : 17 Pages View PDF
A8503
High Efficiency 6-Channel, 2 MHz, WLED/RGB Driver for
Medium Displays, with Integrated 55 V Power Switch
Functional Block Diagram
Vbat
5 to 22 V
Cbat
4.7 μF/35 V
R fset
FSET
OSC
OCP
Soft Start
Ref
COMP
C comp
1 μF
EN
ON/OFF
PWM
ISET
Vin
4.3 to 5.5 V
VIN
Cin
0.1μF
Rpullup
MODE
Internal
Power
UVLO
Shut
down
Latch
Reset
R
Flip-flop
S
FAULT
L
10 μH
ROVP
10 kΩ
SW
SW
OVP
VOUT
COUT
2.2 μF
Current Mode
Boost Controller
OVP
Co m pa ra tors
OVP
L ED 1
PG N D
Feedback
and
C o ntro l
R efer enc e
Cu rr ent
Generator
LED-select
Logic
Open and
Short LED
Detec t
OVP
OCP
TSD
L ED 2
LED3
LED4
LED5
LED6
FAULT
AGND
PGND PGND
DGND
LGND
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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