A8509 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
A8509
Allegro MicroSystems
'A8509' PDF : 28 Pages View PDF
A8509
Wide Input Voltage Range, High Efficiency
4-Channel Fault Tolerant LED Driver
Functional Block Diagram
VDD VDR
GATE SENP SENN
Regulator
VIN
UVLO
1.25 V
Ref
VREF
Internal VDD
AGND
FSET/SYNC
COMP
MODE
EN
PWM
ISET
Oscillator
VREF2 +
FB –
∑
–
+
Driver
Circuit
Fault
Internal
Soft Start
ISS
70 kΩ
Current
Sense
Thermal
Shutdown
100 kΩ
100 kΩ
Enable
PWM
VREF1
ISS
ISET
FB
AGND
Fault
LED
Driver
OVP/UVP
Sense
VREF
Open/Short
LED Detect
OVP
50 μA
LED1
LED2
LED3
LED4
FAULT
PAD
LP Package Only
PGND
AGND
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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