Datasheet > A3977XED

A3977XED

更新时间： 2024-11-24 23:26:43

品牌	Logo	应用领域
其他 - ETC		驱动器
页数	文件大小	规格书
18页	249K
描述
Microstepping DMOS Driver with Translator

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A3977XED 数据手册

3977

MICROSTEPPING DMOS DRIVER

WITH TRANSLATOR

PRELIMINARY INFORMATION

(Subject to change without notice)

February 27, 2003

The A3977xED and A3977xLP are complete microstepping motor

drivers with built-in translator. They are 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.

A3977xED

(PLCC)

BB1

PFD

RC1

VCP

GND

REF

GND

The translator is the key to the easy implementation of the A3977.

By simply inputting one pulse on the STEP input the motor will take

one step (full, half, quarter, or eighth depending on two logic inputs).

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 µP is unavailable or over-burdened.

REG

VREG

÷8

RC2

STEP

LOGIC

SUPPLY

VDD

BB2

Internal synchronous-rectification control circuitry is provided to

improve power dissipation during PWM operation.

Dwg. PP-075-1

Internal circuit protection includes thermal shutdown with hyster-

esis, under-voltage lockout (UVLO) and crossover-current protection.

Special power-up sequencing is not required.

ABSOLUTE MAXIMUM RATINGS

at T_A= +25°C

Load Supply Voltage, V_BB............. 35 V

Output Current, I_OUT.................. ±2.5 A^*

Logic Supply Voltage, V_DD........... 7.0 V

Logic Input Voltage Range, V_IN

The A3977 is supplied in a choice of two power packages, a 44-

lead plastic PLCC with copper batwing tabs (suffix ED), and a thin

(<1.2 mm), 28-lead TSSOP with an exposed thermal pad (suffix LP).

(t_w>30 ns) .... -0.3 V to V_DD+ 0.3 V

(t_w<30 ns) .......... -1 V to V_DD+ 1 V

Sense Voltage, V_SENSE................ 0.5 V

Reference Voltage, V_REF................. V_DD

Package Power Dissipation,

P_D................................ See page 3

Operating Temperature Range, T_A

(A3977Ex).............. -40°C to +85°C

(A3977Kx)............ -40°C to +125°C

(A3977Sx).............. -20°C to +85°C

Junction Temperature, T_J......... +150°C

Storage Temperature Range,

FEATURES

■ ±2.5 A, 35 V Output Rating

■ Low r_DS(on)Outputs, 0.45 Ω Source, 0.36 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

■ Home Output

■ Synchronous Rectification for Low Power Dissipation

■ Internal UVLO and Thermal Shutdown Circuitry

■ Crossover-Current Protection

T_S......................... -55°C to +150°C

* Output current rating may be limited by

duty cycle, ambient temperature, and heat

sinking. Under any set of conditions, do not

exceed the specified current rating or a

junction temperature of 150°C.

Always order by complete part number: the prefix ‘A’ + the basic part number

(3977) + a suffix letter to indicate operating temperature range + a two-letter

suffix to indicate package style, e.g., A3977SLP .

12 3 4 5 6 7...18

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与A3977XED相关器件

型号	品牌	获取价格	描述	数据表
A3977XLP	ETC	获取价格	Microstepping DMOS Driver with Translator
A3979	ALLEGRO	获取价格	Microstepping DMOS Driver with Translator
A3979_08	ALLEGRO	获取价格	Microstepping DMOS Driver with Translator
A3979_13	ALLEGRO	获取价格	Microstepping DMOS Driver with Translator
A3979SLP	ALLEGRO	获取价格	Microstepping DMOS Driver with Translator
A3979SLP-T	ALLEGRO	获取价格	Microstepping DMOS Driver with Translator
A3979SLPTR	ALLEGRO	获取价格	Stepper Motor Controller, 2.5A, BCDMOS, PDSO28, 1.2 MM HEIGHT, EXPOSED PAD, MO-153AET, TSS
A3979SLPTR-T	ALLEGRO	获取价格	Microstepping DMOS Driver with Translator
A397P	NJSEMI	获取价格	High Speed Fast Recovery Rectifier
A397PA	POWEREX	获取价格	Rectifier Diode, 1 Phase, 1 Element, 400A, 1100V V(RRM), Silicon, R62, 2 PIN

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