A6211 ALLEGRO [Allegro MicroSystems], A6211 Datasheet - Page 4

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

A6211
ELECTRICAL CHARACTERISTICS
otherwise noted
BOOT Undervoltage Lockout Threshold
BOOT Undervoltage Lockout Hysteresis V
Input Supply Voltage
V
V
VIN Pin Supply Current
VIN Pin Shutdown Current
BOOT Switch Current Limit Threshold
Buck Switch On-Resistance
Switching Minimum Off-Time
Switching Minimum On-TIme
Selected On-Time
Regulation Comparator and Error Amplifier
Load Current Sense Regulation
Threshold
Load Current Sense Bias Current
Internal Linear Regulator
VCC Regulated Output
VCC Current Limit*
Enable Input
Logic High Voltage
Logic Low Voltage
EN Pin Pull-down Resistance
Maximum PWM Dimming Off-Time
Thermal Shutdown
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
*The internal linear regulator is not designed to drive an external load
IN
IN
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
Characteristics
V
V
Symbol
BOTUVHYS
V
UVLO_HYS
T
t
I
R
R
V
I
BOOTUV
t
CSBIAS
I
t
OFFmin
SWLIM
I
ONmin
CCLIM
CSREG
PWML
SDHYS
DS(on)
V
T
V
INSD
V
UVLO
t
V
ENPD
I
ON
Valid at V
IN
CC
SD
IN
IH
IL
Constant-Current 3-Ampere PWM Dimmable
T
V
V
V
EN shorted to GND
V
V
V
V
V
V
V
0 mA < I
V
V
V
V
Measured while EN = low, during dimming
control, and internal references are powered-on
(exceeding t
A
IN
IN
CS
BOOT
BOOT
BOOT
CS
IN
CS
CS
IN
EN
EN
EN
= 25°C
IN
increasing
decreasing
= 24 V, V
= 24 V, V
decreasing, SW turns on
= 0.5 V, EN = high
= 0 V
= 0.2 V, EN = low
increasing
decreasing
= 5 V
= 24 V, for T
= V
to V
to V
CC
IN
SW
SW
< 5 mA, V
PWML
+ 4.3 V, T
OUT
CC
increasing
decreasing
Test Conditions
= 0 V
= 12 V, R
results in shutdown)
A
= –40°C to 105°C, typical values at T
IN
A
= 25°C, I
> 6 V
ON
= 137 kΩ
SW
Buck Regulator LED Driver
= 1 A
187.5
Min.
800
3.0
1.7
5.0
1.8
10
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
6
–
–
–
–
–
–
–
–
–
5
–
–
–
–
A
= 25°C; unless
1000
Typ.
0.25
150
370
110
110
200
100
165
5.3
4.0
2.9
0.9
5.3
20
17
25
–
5
1
–
–
Max.
1200
150
150
210
5.0
0.4
4.3
5.6
0.4
48
10
–
–
–
–
–
–
–
–
–
–
–
Unit
mV
mV
mA
mV
mA
kΩ
ms
μA
ns
ns
ns
μA
°C
°C
Ω
V
V
A
V
V
V
V
4