A3977(2013) 查看數據表（PDF） - Allegro MicroSystems
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A3977 Datasheet PDF : 19 Pages
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A3977
Microstepping DMOS Driver with Translator
Selection Guide
Part Number
Packing
Package
Ambient Temperature, TA
(°C)
A3977KEDTR-T*
450 per reel
44-pin PLCC
–40 to 125
A3977SEDTR-T*
450 per reel
44-pin PLCC
–20 to 85
A3977SLPTR-T
4000 per reel
28-pin TSSOP
–20 to 85
*Variant is in production but has been determined to be LAST TIME BUY. This classification indicates that the
variant is obsolete and notice has been given. Sale of the variant is currently restricted to existing customer
applications. The variant should not be purchased for new design applications because of obsolescence in the
near future. Samples are no longer available. Status date change April 23, 2013. Deadline for receipt of LAST
TIME BUY orders is September 30, 2013.
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Logic Supply Voltage
Logic Input Voltage Range
Reference Voltage
Sense Voltage (DC)
Output Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
VBB
VDD
VIN
VREF
VSENSE
IOUT
TA
TJ(max)
Tstg
Notes
Pulsed, tw > 30 ns
Pulsed, tw < 30 ns
Output current rating may be limited by duty
cycle, ambient temperature, and heat sinking.
Under any set of conditions, do not exceed the
specified current rating or a junction temperature
of 150°C.
Range K
Range S
Rating
35
7.0
–0.3 to VDD+ 0.3
–1.0 to VDD+ 1
VDD
0.5
±2.5
–40 to 125
–20 to 85
150
–55 to 150
Units
V
V
V
V
V
V
A
ºC
ºC
ºC
ºC
Thermal Characteristics
Characteristic
Package Thermal Resistance
Symbol
RθJA
Test Conditions*
Package ED, on 4-layer PCB based on JEDEC standard
Package LP, on 4-layer PCB based on JEDEC standard
*Additional thermal information available on the Allegro website.
Value Units
22 ºC/W
28 ºC/W
Allegro MicroSystems, LLC
2
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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