A2550 Allegro MicroSystems, Inc., A2550 Datasheet - Page 3

• Manufacturer Part Number: A2550
• Description: Relay Driver With 5 V Regulator For Automotive Applications
• Manufacturer: Allegro MicroSystems, Inc.

A2550
Component Selection Table
CWD, CPOR
Controller
Micro
CREG5
Name
CBB
CBB
Hi-V
Enable
ENBAT
Suitable Characteristics
A
0.47 μF, 25 V, X7R ceramic
0.22 μF, 16 V, X7R ceramic
A
CREG5
0 . 47 μF
X7R
VREG5
PGND
LGND
33 μF, 63 V electrolytic
NPOR
LGND and PGND must be connected externally.
WDI
EN
IN1
IN2
IN3
Functional Block Diagram
Protection
200 k
200 k
200 k
Hi-V
Fault
Logic
TSD
Overcurrent
Overcurrent
Overcurrent
Protection
Protection
Protection
VBB
Watchdog
Regulator
Linear
5V
Relay Driver with 5 V Regulator
Enable
United Chemi-Con EGXE630E--330MH12D
VREG5 UVLO
TSD
Reference
for Automotive Applications
Internal
Representative Device
Adjustable
Delay
V
ref
A2550
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
CWD
OUT1
OUT2
OUT3
CPOR
VBAT
Coil 1
Vdc
Relays or Other
Inductive Loads
Coil 2
Coil 3
3