A3986SLDTR View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A3986SLDTR' PDF : 16 Pages View PDF
A3986
Dual Full-Bridge MOSFET Driver
with Microstepping Translator
ELECTRICAL CHARACTERISTICS, continued, at TA = 25°C, VDD = 5 V, VBB = 12 to 50V, unless noted otherwise
Characteristics
Symbol
Test Conditions
Min. Typ. Max. Units
Current Control
Blank Time
Fixed Off-Time
Reference Input Voltage
Internal Reference Voltage
Current Trip Point Error3
Reference Input Current1
Oscillator Frequency
Protection
tBLANK
tOFF
VREF
VREFInt
EITRIP
IREF
fOSC
ROSC = 10 kΩ,
ROSC = 10 kΩ, , SR= High
20 kΩ to VDD
VREF = 2 V
ROSC = 10 kΩ
1.2
1.5
1.8 μs
18.12
–
23.16 μs
0.8
–
2
V
1.9
2.0
2.1
V
–
–
±5
%
–3
0
3
μA
3.2
4
4.8 MHz
VREG Undervoltage Lockout
VREG Undervoltage Lockout
Hysteresis
VREGUV Decreasing VREG
VREGUVHys
7.5
8
8.5
V
100
200
–
mV
VDD Undervoltage Lockout
VDD Undervoltage Lockout
Hysteresis
VDDUV Decreasing VDD
VDDUVHys
2.45
2.7
2.95 V
50
100
–
mV
Overtemperature Shut Down
Overtemperature Shut Down
Hysteresis
TTSD
TTSDHys
Temperature increasing
Recovery = TTSD – TTSDHys
–
165
–
ºC
–
15
–
ºC
Control Timing
STEP Low Duration
STEP High Duration
Setup Duration
tSTEPL
tSTEPH
tSU
Input change to STEP pulse;
MS1, MS2, DIR
1
–
1
–
200
–
–
μs
–
μs
–
ns
Hold Duration
tH
Input change from STEP pulse;
MS1, MS2, DIR
200
–
–
ns
Wake Time Duration
tWAKE
1
–
–
ms
1For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2A RESET pulse of this duration will reset the translator to the Home position without entering Sleep mode.
3Current Trip Point Error is the difference between actual current trip point and the target current trip point, referred to full
scale (100%) current: EITRIP = 100 × (ITRIPActual – ITRIPTarget) / IFullScale %
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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