A3977SEDTR datasheet, PDF - EEWORLD Datasheet

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A3977SEDTR: DescriptionIC motor driver par 44plcc; CategoryOther integrated circuit (IC) The signal circuit; File Size571KB，19 Pages; ManufacturerAllegro; Websitehttp://www.allegromicro.com/

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A3977SEDTR Overview

IC motor driver par 44plcc

A3977SEDTR Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Allegro
Parts packaging code	LCC
package instruction	QCCJ, LDCC44,.7SQ
Contacts	44
Reach Compliance Code	compli
ECCN code	EAR99
Analog Integrated Circuits - Other Types	STEPPER MOTOR CONTROLLER
JESD-30 code	S-PQCC-J44
JESD-609 code	e0
length	16.585 mm
Number of functions	1
Number of terminals	44
Maximum operating temperature	85 °C
Minimum operating temperature	-20 °C
Maximum output current	2.5 A
Package body material	PLASTIC/EPOXY
encapsulated code	QCCJ
Encapsulate equivalent code	LDCC44,.7SQ
Package shape	SQUARE
Package form	CHIP CARRIER
Peak Reflow Temperature (Celsius)	240
power supply	3.3/5,35 V
Certification status	Not Qualified
Maximum seat height	4.57 mm
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	3 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
technology	NMOS
Temperature level	OTHER
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	J BEND
Terminal pitch	1.27 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	30
width	16.585 mm

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A3977

Microstepping DMOS Driver with Translator

Features and Benefits

▪

±2.5 A, 35 V output rating

▪

Low r

DS(on)

outputs, 0.45

source, 0.36

sink typical

▪

Automatic current decay mode detection/selection

▪

3.0 to 5.5 V logic supply voltage range

▪

Mixed, fast, and slow current decay modes

▪

Home output

▪

Synchronous rectification for low power dissipation

▪

Internal UVLO and thermal shutdown circuitry

▪

Crossover-current protection

Description

The A3977 is a complete microstepping motor driver, with built-

in translator. It is designed to operate bipolar stepper motors in

full-, half-, quarter-, and eighth-step modes, with output drive

capability of 35 V and ±2.5 A. The A3977 includes a fixed

off-time current regulator that has the ability to operate in

slow-, fast-, or mixed-decay modes. This current-decay control

scheme results in reduced audible motor noise, increased step

accuracy, and reduced power dissipation.

The translator is the key to the easy implementation of the

A3977. Simply inputting one pulse on the STEP input drives the

motor one step (two logic inputs determine if it is a full-, half-,

quarter-, or eighth-step). There are no phase-sequence tables,

high-frequency control lines, or complex interfaces to program.

The A3977 interface is an ideal fit for applications where a

complex microprocessor is unavailable or over-burdened.

Internal synchronous-rectification control circuitry is provided

to improve power dissipation during PWM operation.

Internal circuit protection includes thermal shutdown with

hysteresis, undervoltage lockout (UVLO) and crossover-current

protection. Special power-up sequencing is not required.

The A3977 is supplied in a choice of two power packages, a

44-pin plastic PLCC with 3 internally-fused pins on each of

four sides (suffix ED), and a thin (<1.2 mm), 28-pin TSSOP

with an exposed thermal pad (suffix LP). Both packages are

lead (Pb) free, with 100% matte tin leadframe plating.

Packages:

Package ED, 44-pin PLCC

with internally fused pins

Package LP, 28-pin TSSOP

with exposed thermal pad

Not to scale

Pin-out Diagram

LOAD

SUPPLY

SENSE

ENABLE

OUT

HOME

GND

DIR

SLEEP

OUT

BB1

PFD

CHARGE PUMP

39 NC

38 CP

37 CP

36 V

35 GND

34 GND

33 GND

REG

PWM

TIMER

GND 11

GND 12

GND 13

REF 14

LOGIC

SUPPLY 16

NC 17

BB2

OUT

TRANSLATOR

& CONTROL LOGIC

÷8

31 STEP

30 NC

29 NC

SENSE

GND

SUPPLY

LOAD

RESET

OUT

Dwg. PP-075-1

26184.22K

A3977SEDTR Related Products

	A3977SEDTR	A3977KEDTR	A3977KLPTR	A3977KED	A3977KEDTR-T	A3977KLPTR-T	A3977SEDTR-T	A3977KED-T
Description	IC motor driver par 44plcc	IC motor driver par 44plcc	IC motor driver par 28tssop	IC motor driver par 44plcc	IC motor driver par 44plcc	IC motor driver par 28tssop	IC motor driver par 44plcc	IC motor driver par 44plcc
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible	conform to	conform to	conform to	conform to
Maker	Allegro	Allegro	Allegro	Allegro	Allegro	Allegro	Allegro	Allegro
Parts packaging code	LCC	LCC	SSOP	LCC	LPCC	TSSOP	LPCC	LCC
package instruction	QCCJ, LDCC44,.7SQ	QCCJ, LDCC44,.7SQ	HTSSOP, TSSOP28,.25	QCCJ, LDCC44,.7SQ	QCCJ, LDCC44,.7SQ	HTSSOP, TSSOP28,.25	LEAD FREE, PLASTIC, MS-018AC, LCC-44	QCCJ, LDCC44,.7SQ
Contacts	44	44	28	44	44	28	44	44
Reach Compliance Code	compli	compli	compli	compli	unknow	unknow	unknow	compli
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER	STEPPER MOTOR CONTROLLER
JESD-30 code	S-PQCC-J44	S-PQCC-J44	R-PDSO-G28	S-PQCC-J44	S-PQCC-J44	R-PDSO-G28	S-PQCC-J44	S-PQCC-J44
JESD-609 code	e0	e0	e0	e0	e3	e3	e3	e3
length	16.585 mm	16.585 mm	9.7 mm	16.585 mm	16.59 mm	9.7 mm	16.59 mm	16.585 mm
Number of functions	1	1	1	1	1	1	1	1
Number of terminals	44	44	28	44	44	28	44	44
Maximum operating temperature	85 °C	125 °C	125 °C	125 °C	125 °C	125 °C	85 °C	125 °C
Minimum operating temperature	-20 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-20 °C	-40 °C
Maximum output current	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	QCCJ	QCCJ	HTSSOP	QCCJ	QCCJ	HTSSOP	QCCJ	QCCJ
Encapsulate equivalent code	LDCC44,.7SQ	LDCC44,.7SQ	TSSOP28,.25	LDCC44,.7SQ	LDCC44,.7SQ	TSSOP28,.25	LDCC44,.7SQ	LDCC44,.7SQ
Package shape	SQUARE	SQUARE	RECTANGULAR	SQUARE	SQUARE	RECTANGULAR	SQUARE	SQUARE
Package form	CHIP CARRIER	CHIP CARRIER	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	CHIP CARRIER	CHIP CARRIER	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	CHIP CARRIER	CHIP CARRIER
Peak Reflow Temperature (Celsius)	240	240	240	240	NOT SPECIFIED	260	NOT SPECIFIED	260
power supply	3.3/5,35 V	3.3/5,35 V	3.3/5,35 V	3.3/5,35 V	3.3/5,35 V	3.3/5,35 V	3.3/5,35 V	3.3/5,35 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	4.57 mm	4.57 mm	1.2 mm	4.57 mm	4.57 mm	1.2 mm	4.57 mm	4.57 mm
Maximum supply voltage (Vsup)	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V
Minimum supply voltage (Vsup)	3 V	3 V	3 V	3 V	3 V	3 V	3 V	3 V
Nominal supply voltage (Vsup)	5 V	5 V	5 V	5 V	5 V	5 V	5 V	5 V
surface mount	YES	YES	YES	YES	YES	YES	YES	YES
Temperature level	OTHER	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	AUTOMOTIVE	OTHER	AUTOMOTIVE
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	J BEND	J BEND	GULL WING	J BEND	J BEND	GULL WING	J BEND	J BEND
Terminal pitch	1.27 mm	1.27 mm	0.65 mm	1.27 mm	1.27 mm	0.65 mm	1.27 mm	1.27 mm
Terminal location	QUAD	QUAD	DUAL	QUAD	QUAD	DUAL	QUAD	QUAD
Maximum time at peak reflow temperature	30	30	30	30	NOT SPECIFIED	40	NOT SPECIFIED	40
width	16.585 mm	16.585 mm	4.4 mm	16.585 mm	16.59 mm	4.4 mm	16.59 mm	16.585 mm
technology	NMOS	NMOS	NMOS	NMOS	NMOS	NMOS	NMOS	-

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