Linear Current Regulator and Controller

for Automotive LED Arrays

A6274, A6274-1

A6284, A6284-1

7

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

LOGIC SIGNAL SPECIFICATIONS

FFn Output (Open Drain)

–

–

0.4

V

–1

–

1

µA

PWMIN, ENx Low Voltage

●

–

–

0.8

V

PWMIN, ENx High Voltage

●

2

–

–

V

FFn Input Low Voltage

MODE = 1; FFn pin acts as bidirectional

pin when MODE = 1

●

–

–

0.8

V

FFn Input High Voltage

●

2.1

–

–

V

PWMIN Input Hysteresis

150

270

–

mV

ENx Input Hysteresis

40

–

–

mV

ENx Internal Pull-Down Resistance

−

200

−

kΩ

COMP SPECIFICATIONS

COMP Source Current

−

320

−

µA

−

–320

−

µA

COMP Startup Sinking Current

−

2

−

mA

1

For input and output current specifications, negative current is defined as coming out of the node or pin (sourcing), and positive current is defined as going into the node

or pin (sinking).

2

Ensured by design and characterization, not production tested.

2a

Max limit ensured by design and characterization, not production tested.

3

4