A3980KLP datasheet(6/18 Pages) ALLEGRO

6 / 18 page

Automotive DMOS Microstepping Driver

with Translator

A3980

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Characteristics

Symbol

Test Conditions

Min.

Typ.1

Max.

Units

Current Control

Blank Time

tBLANK

RT = 56 K , CT = 680 pF

700

950

1200

Fixed Off Time

tOFF

RT = 56 K , CT = 680 pF

μs

Mixed Decay Trip Points

PFDH

PFDL

––

0.60 VDD

0.21 VDD

–

Crossover Dead Time

tDT

–

100

475

800

Recommended Reference Input Voltage

VREF

–

0.8

–

Reference Input Current2

IREF

–

–3

μA

Current Trip-Level Error3

errI

2 V < VREF < 4 V, %ITripMAX = 38%

2 V < VREF < 4 V, %ITripMAX = 70%

2 V < VREF < 4 V, %ITripMAX = 100%

––

±15

±10

±5

Thermal Protection

Thermal Shutdown

TSD

–

160

170

180

ºC

Thermal Shutdown Hysteresis

TSDH

––

–

ºC

Diagnostics

Max VDS on High-Side Bridge FETs

VDSHT

Sampled after tBLANK + tSCT

–

1.5

–

Max VDS on Low-Side Bridge FETs

VDSLT

Sampled after tBLANK + tSCT

–

1.5

–

VDS Fault Measurement Delay

tSCT

––

700

–

Minimum Load Current

IOC

w.r.t. ITRIPMAX at Home position

–

VBB Overvoltage Lockout

VOVB

VBB rising

VBB Overvoltage Lockout Hysteresis

VOVBH

–

VREG Undervoltage Lockout

VUVR

VREG falling

5.3

5.7

6.0

VDD Enable Threshold

VUVD

VDD rising

2.45

2.7

2.95

VDD Enable Threshold Hysteresis

VUVDH

–

100

–

ELECTRICAL CHARACTERISTICS (continued) at TJ = –40°C to +150ºC, VBB = 14 V, VDD = 3.0 to 5.5 V (unless otherwise noted)

1Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary

for individual units, within the speciﬁed maximum and minimum limits.

2Negative current is deﬁned as coming out of (sourcing from) the speciﬁed device pin.

3errI = (ITrip – IProg) ⁄ IProg, where IProg = %ITripMAX

×ITripMAX.

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