A3980 Datasheet PDF - Allegro MicroSystems
| Part Number | A3980 | |
| Description | Automotive DMOS Microstepping Driver with Translator | |
| Manufacturers | Allegro MicroSystems | |
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A3980
Automotive DMOS Microstepping Driver with Translator
Package LP
SENSE1 1
SR 2
DIR 3
OUT1A 4
PFD 5
RC1 6
AGND 7
REF 8
÷8
RC2 9
VDD 10 VDD
OUT2A 11
MS2 12
MS1 13
SENSE2 14
VBB1 28 VBB1
27 SLEEP
26 ENABLE
25 OUT1B
24 CP2
23 CP1
22 VCP
21 PGND
Reg 20 VREG
19 STEP
18 OUT2B
17 FF2
16 FF1
VBB2 15 VBB2
Approximate Scale 1:1
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage, 500 ms,VBB .....................50 V
Logic Supply Voltage, VDD................................7.0 V
Logic Input Voltage
VIN ................................. –0.3 V to VDD + 0.3 V
(tW < 30 ns) ....................... –1.0 V to VDD + 1 V
Sense Voltage, VSENSE .......................................0.5 V
Reference Voltage, VREF ……….. ........... 0 V to VDD
Package Power Dissipation (TA = +25ºC), PD
"High-K" PCB1 ..............................RθJA28ºC/W
Typical PCB2..................................RθJA38ºC/W
Operating Temperature Range
Junction Temperature, TJ ...........–40°C to +150°C
Storage Temperature, TS ..........–55°C to +150°C
1Measured on a JEDEC-standard "High-K" 4-layer PCB.
2Measured on a typical two-sided PCB with 3 in.2 copper
ground area.
The A3980 is a complete microstepping motor driver with built-in
translator for easy operation. It is designed to operate bipolar stepper
motors in full-, half-, eighth-, and sixteenth-step modes, at up to 35 V
and ±1 A. The A3980 includes a fixed off-time current regulator which
has the ability to operate in slow, fast, or mixed decay modes. This
results in reduced audible motor noise, increased step accuracy, and
reduced power dissipation.
The translator is the key to the easy implementation of the A3980.
Simply inputting one pulse on the step input drives the motor one
microstep. There are no phase sequence tables, high frequency control
lines, or complex interfaces to program. The A3980 interface is an ideal
fit for applications where a complex µP is unavailable or overburdened.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation.
Internal circuit protection includes: thermal shutdown with hysteresis,
overvoltage lockout (OVLO), undervoltage lockout (UVLO), and
crossover current protection. Special power-up sequencing is not
required. In addition, two diagnostic fault flags provide indication of
shorts or opens on the motor windings.
The A3980 is supplied in a low-profile (1.1 mm) 28L TSSOP with
exposed thermal pad (part number suffix LP).
FEATURES
Typical application up to ±1 A, 35 V output rating
Low RDS(ON) outputs, 0.67 Ω source, 0.54 Ω sink typical
Automatic current decay mode detection/selection
3.0 V to 5.5 V logic supply voltage range
Mixed, fast, and slow current decay modes
Synchronous rectification for low power dissipation
Internal OVLO, UVLO, and thermal shutdown circuitry
Crossover current protection
Short to supply/ground and short/open load diagnostics
APPLICATIONS
Automotive stepper motors
Engine management
Headlamp positioning
Use the following complete part number when ordering:
Part Number
Package
Description
A3980KLP
28-pin, TSSOP
Exposed thermal pad
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A3980
Automotive DMOS Microstepping Driver with Translator
Logic Interface Timing Diagram
tSTPH
STEP
MS1, MS2,
or DIR
tSU tH
tEN
SLEEP
tSTPL
Table 1. Microstep Resolution Truth Table
MS1 MS2
Microstep Resolution
LL
Full Step
HL
Half Step
LH
HH
Eighth Step
Sixteenth Step
Table 2. Fault Report by Fault Flags
FF1 FF2
Fault
L
L
UVLO, OVLO, Overtemperature,
Open Load, or Shorted Load
HL
Short to Ground
LH
Short to Supply
HH
None
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A3980 electronic component. |
| Information | Total 18 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ A3980.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
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| A3980KLP | The function is Automotive DMOS Microstepping Driver with Translator. Allegro MicroSystems | |
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