Datasheet > 3972

3972

更新时间： 2024-02-23 18:58:27

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器电机
页数	文件大小	规格书
12页	190K
描述
DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER

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3972 数据手册

3972

DUAL DMOS FULL-BRIDGE MICRO-

STEPPING PWM MOTOR DRIVER

Designed for pulse-width modulated (PWM) current control of

bipolar microstepping stepper motors, the A3972SB is capable of

continuous output currents to 1.5 A and operating voltages to 50 V.

Internal fixed off-time PWM current-control timing circuitry can be

programmed via a serial interface to operate in slow, fast, and mixed

current-decay modes.

VCP

CP1

CP2

OSC

23 SLEEP

VREG

OUT1B

LOAD

21 OUT2B

The desired load-current level is set via the serial port with two 6-bit

linear DACs in conjunction with a reference voltage. The six bits of

control allow maximum flexibility in torque control for a variety of step

methods, from microstepping to full-step drive. Load current is set in

1.56% increments of the maximum value.

LOAD

SUPPLY

BB1

BB2

GROUND

SENSE

Synchronous rectification circuitry allows the load current to flow

through the low r_DS(on)of the DMOS output driver during the current

decay. This feature will eliminate the need for external clamp diodes in

most applications, saving cost and external component count, while

minimizing power dissipation.

OUT2A

LOGIC

OUT1A

STROBE

VDD

SUPPLY

MUX

CLOCK

Internal circuit protection includes thermal shutdown with hyster-

esis, transient-suppression diodes, and crossover-current protection.

Special power-up sequencing is not required.

REF

DATA 12

Dwg. PP-069-3

The A3972SB is supplied in a 24-lead plastic DIP with a copper

batwing power tab (suffix ‘B’). The power tab is at ground potential and

needs no electrical isolation.

ABSOLUTE MAXIMUM RATINGS

at T_A= +25°C

Load Supply Voltage, V_BB................ 50 V

Output Current, I_OUT...................... 1.5 A

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

Logic Input Voltage Range,

V_IN................ -0.3 V to V_DD+ 0.3 V

Reference Voltage, V_REF..................... 3 V

Sense Voltage (dc), V_S................ 500 mV

Package Power Dissipation,

P_D.......................................... 3.1 W

Operating Temperature Range,

T_A.......................... -20°C to +85°C

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

Storage Temperature Range,

FEATURES

1.5 A, 50 V Continuous Output Rating

I Low r_DS(on)DMOS Output Drivers

I Optimized Microstepping via 6-Bit Linear DACs

I Programmable Mixed, Fast, and Slow Current-Decay Modes

I 4 MHz Internal Oscillator for Digital Timing

I Serial-Interface Controls Chip Functions

I Synchronous Rectification for Low Power Dissipation

I Internal UVLO and Thermal Shutdown Circuitry

I Crossover-Current Protection

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

I Precision 2 V Reference

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 tempera-

ture of 150°C.

I Inputs Compatible with 3.3 V or 5 V Control Signals

I Sleep and Idle Modes

Always order by complete part number: A3972SB .

12 3 4 5 6 7...12

中文翻译

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与3972相关器件

型号	品牌	获取价格	描述	数据表
3973	ALLEGRO	获取价格	DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER
397-3105MHZ	MTRONPTI	获取价格	Quartz Crystal,
397-3106MHZ	MTRONPTI	获取价格	Quartz Crystal,
397360009	MOLEX	获取价格	Barrier Strip Terminal Block,
3974	ALLEGRO	获取价格	DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
3974_1	ALLEGRO	获取价格	DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
397560011	MOLEX	获取价格	Headers and Edge Type Connector,
3976	ALLEGRO	获取价格	DUAL FULL BRIDGE PROTECTED MOTOR DRIVER
39761	SCHOTT	获取价格	TRANSFORMER,ADSL
3977	ALLEGRO	获取价格	MICROSTEPPING DMOS DRIVER WITH TRANSLATOR

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