A6211 ALLEGRO [Allegro MicroSystems], A6211 Datasheet - Page 3

• Manufacturer Part Number: A6211
• Description: Constant-Current 3-Ampere PWM Dimmable Buck Regulator LED Driver
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A6211
V
IN
R
ON
TON
VIN
EN
0.2 V
C
COMP
+
V
V
–
IL
IH
= 0.4 V
= 1.8 V
Generator
On-Time
Current
+
–
+
–
PAD
V
REG
On-Time
Timer
Constant-Current 3-Ampere PWM Dimmable
5.3 V
Functional Block Diagram
IC and Driver
Control Logic
VCC
Off-Time
Timer
CVCC
Current Limit
UVLO
Level Shift
V
Off-Time
CC
Timer
Gate Drive
Average
UVLO
Shutdown
GND
V
Shutdown
Thermal
CC
BOOT
UVLO
Buck Regulator LED Driver
–
CBOOT
+
I
LIM
Current Sense
Buck Switch
SW
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
CS
D1
L1
RSENSE
LED String
3