A8509 View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

Manufacturer

A8509

Wide Input Voltage Range, High Efficiency 4-Channel Fault Tolerant LED Driver

Allegro MicroSystems 

A8509

Wide Input Voltage Range, High Efficiency

4-Channel Fault Tolerant LED Driver

ELECTRICAL CHARACTERISTICS1 (continued) Valid at VIN = 12 V, TA = 25°C, indicates specifications guaranteed by design

and characterization over the full operating temperature range with TA = TJ = –40°C to 105°C; unless otherwise noted

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

¯F¯¯A¯¯U¯¯L¯¯T¯ Pin

¯F¯¯A¯U¯¯L¯¯T¯ Pin Pull-Down Voltage

VFAULT

IFAULT = 1 mA (400 Ω internal switch

resistance)

−

0.4

−

V

¯F¯¯A¯U¯¯L¯¯T¯ Pin Leakage Current

IFAULTLKG VFAULT = 5 V

−

−

1

μA

Thermal Protection (TSD)

Thermal Shutdown Threshold2

TSD Temperature rising

−

165

−

ºC

Thermal Shutdown Hysteresis2

TSDHYS

−

20

−

ºC

1For input and output current specifications, negative current is defined as coming out of the node or pin (sourcing), positive

current is defined as going into the node or pin (sinking).

2Ensured by design and characterization, not production tested.

654

653

652

651

650

649

648

647

646

645

644

643

-40

-20

0

20

40

60

Junction Temperature, TJ (°C)

80

100

Allegro MicroSystems, Inc.

7

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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