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A3979 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. A3979
Description  Microstepping DMOS Driver with Translator
Download  15 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3979 Datasheet(HTML) 4 Page - Allegro MicroSystems

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DMOS Microstepping Driver with Translator
A3979
4
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ELECTRICAL CHARACTERISTICS at TA = 25°C, VBB = 35 V, VDD = 3.0 to 5.5 V (unless otherwise noted)
Characteristics
Symbol
Test Conditions
Min.
Typ.1
Max.
Units
Output Drivers
Load Supply Voltage Range
VBB
Operating
8
35
V
During Sleep mode
0
35
V
Output Leakage Current2
IDSS
VOUT = VBB
<1.0
20
μA
VOUT = 0 V
<1.0
–20
μA
Output On Resistance
RDS(On)
Source driver, IOUT = –2.5 A
0.28
0.335
Ω
Sink driver, IOUT = 2.5 A
0.22
0.265
Ω
Body Diode Forward Voltage
VF
Source diode, IF = –2.5 A
1.4
V
Sink diode, IF = 2.5 A
1.4
V
Motor Supply Current
IBB
fPWM < 50 kHz
8.0
mA
Operating, outputs disabled
6.0
mA
Sleep mode
20
μA
Control Logic
Logic Supply Voltage Range
VDD
Operating
3.0
5.0
5.5
V
Logic Supply Current
IDD
fPWM < 50 kHz
12
mA
Outputs off
10
mA
Sleep mode
20
μA
Logic Input Voltage
VIN(1)
0.7
× VDD
––
V
VIN(0)
––
0.3
×VDD
V
Logic Input Current2
IIN(1)
VIN = 0.7× VDD
–20
<1.0
20
μA
IIN(0)
VIN = 0.3× VDD
–20
<1.0
20
μA
Reference Input Voltage Range
VREF
Operating
0
VDD
V
Reference Input Current
IREF
–0
±3
μA
HOME Output Voltage
VHOME(1) IHOME(1) = –200 μA
0.7
× VDD
––
V
VHOME(0) IHOME(0) = 200 μA–
0.3
× VDD
V
Mixed Decay Mode Trip Point
VPFDH
0.6
×VDD
–V
VPFDL
0.21
×VDD
–V
Gain (Gm) Error3
EG
VREF = 2 V, Phase Current = 38.27%
±10
%
VREF = 2 V, Phase Current = 70.71%
±5.0
%
VREF = 2 V, Phase Current = 100.00%
±5.0
%
STEP Pulse Width
tW
1––
μs
Blank Time
tBLANK
RT = 56 kΩ, CT = 680 pF
700
950
1200
ns
Fixed Off-Time
tOFF
RT = 56 kΩ, CT = 680 pF
30
38
46
μs
Crossover Dead Time
tDT
Synchronous rectification enabled
100
475
800
ns
Continued on the next page...


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