A3977

Manufacturer Part NumberA3977
DescriptionMicrostepping DMOS Driver with Translator
ManufacturerAllegro MicroSystems, Inc.
A3977 datasheet
 
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V
BB1
NC
7
NC
8
PFD
9
RC
10
1
GND
11
GND
12
GND
13
REF
14
RC
2
15
LOGIC
16
V
DD
SUPPLY
NC
17
V
BB2
3977
MICROSTEPPING DMOS DRIVER
NC
39
CP
38
2
CP
37
1
V
36
CP
35
GND
GND
34
GND
33
V
32
REG
31
STEP
NC
30
NC
29
Dwg. PP-075-1
WITH TRANSLATOR
A3977SLP

A3977 Summary of contents

  • Page 1

    ... V BB1 PFD GND 11 GND 12 GND 13 REF LOGIC SUPPLY BB2 3977 MICROSTEPPING DMOS DRIVER GND GND 34 GND REG 31 STEP Dwg. PP-075-1 WITH TRANSLATOR A3977SLP ...

  • Page 2

    ... PWM LATCH BLANKING MIXED DECAY PWM TIMER DMOS H BRIDGE PWM TIMER PWM LATCH BLANKING MIXED DECAY + - 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2002, 2003 Allegro MicroSystems, Inc BB1 OUT 1A OUT 1B SENSE 1 ...

  • Page 3

    MICROSTEPPING DMOS DRIVER ...

  • Page 4

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ...

  • Page 5

    ELECTRICAL CHARACTERISTICS at T noted) Characteristic Control Logic (cont’d) Mixed Decay Trip Point Ref. Input Voltage Range Reference Input Current Gain (G ) Error m (note 3) Crossover Dead Time Thermal Shutdown Temp. Thermal Shutdown Hysteresis UVLO Enable Threshold UVLO ...

  • Page 6

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ...

  • Page 7

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 3977 ...

  • Page 8

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ...

  • Page 9

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 3977 ...

  • Page 10

    MICROSTEPPPING DMOS DRIVER WITH TRANSLATOR Full Step Half Step Table 2. Step Sequencing Home State = 45º Step Angle, DIR = H Phase 1 Current ¼ ...

  • Page 11

    STEP INPUT HOME OUTPUT 70.7% –70.7% 70.7% –70.7% www.allegromicro.com MICROSTEPPING DMOS DRIVER WITH TRANSLATOR Dwg. WK-004-15 3977 ...

  • Page 12

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR STEP INPUT HOME OUTPUT 100% 70.7% –70.7% –100% 100% 70.7% –70.7% –100% 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dwg. WK-004-14 ...

  • Page 13

    STEP INPUT HOME OUTPUT 100% 70.7% 38.3% –38.3% –70.7% –100% 100% 70.7% 38.3% –38.3% –70.7% –100% www.allegromicro.com MICROSTEPPING DMOS DRIVER WITH TRANSLATOR Dwg. WK-004-13 3977 ...

  • Page 14

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR STEP INPUT HOME OUTPUT 100% 70.7% 38.3% –38.3% –70.7% –100% 100% 70.7% 38.3% –38.3% –70.7% –100% 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dwg. WK-004-12 ...

  • Page 15

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 3977 ...

  • Page 16

    MICROSTEPPING DMOS DRIVER WITH TRANSLATOR 0.319 0.291 0.021 0.013 0.319 0.291 0.050 BSC 0.020 MIN 0.180 0.165 8.10 7.39 0.533 0.331 8.10 7.39 1.27 BSC 0.51 MIN 4.57 4.20 NOTES: 1. Exact body and lead configuration at vendor’s option ...

  • Page 17

    MAX 0.0059 0.00 28 4.50 4.30 0. 0.19 1.20 MAX 0.15 0.00 NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is ...

  • Page 18

    ... WITH TRANSLATOR The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current ...