A2550KLPTR-T View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A2550KLPTR-T' PDF : 15 Pages View PDF
A2550
Relay Driver with 5 V Regulator
for Automotive Applications
Functional Block Diagram
CBB
Hi-V
Enable
ENBAT
VREG5
CREG5
0.47 μF
X7R
EN
VBB
Hi-V
Protection
TSD
5V
Linear
Regulator
Enable Internal
Reference
A2550
Vref
VBAT
Micro
Controller
NPOR
PGND
A
LGND
WDI
IN1
200 k7
Adjustable
Delay
VREG5 UVLO
TSD
Watchdog
Overcurrent
Protection
CPOR
Relays or Other
Vdc Inductive Loads
CWD
OUT1
Coil 1 Coil 2
Coil 3
OUT2
IN2
200 k7
Overcurrent
Protection
OUT3
IN3
200 k7
Overcurrent
Protection
Fault
Logic
A LGND and PGND must be connected externally.
Component Selection Table
Name
Suitable Characteristics
CBB
33 μF, 63 V electrolytic
CREG5
0.47 μF, 25 V, X7R ceramic
CWD, CPOR
0.22 μF, 16 V, X7R ceramic
Representative Device
United Chemi-Con EGXE630E--330MH12D
Allegro MicroSystems, Inc.
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Share Link: 
