A3992SBT-

更新时间： 2025-08-31 03:16:35

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
13页	477K
描述
DMOS Dual Full-Bridge Microstepping PWM Motor Driver

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A3992SBT- 数据手册

A3992

DMOS Dual Full-Bridge Microstepping PWM Motor Driver

Features and Benefits

Description

▪ ±1.5 A, 50 V continuous output rating

▪ Low R_DS(on)DMOS output drivers

Designed for pulse width modulated (PWM) current control of

bipolar microstepped stepper motors, the A3992 is capable of

continuous output currents to ±1.5 A and operating voltages to

50 V. Internalfixedoff-timePWMcurrentcontroltimingcircuitry

can be programmed via the serial interface to operate in slow, fast,

or mixed decay modes.

▪ Short-to-ground protection

▪ Shorted load protection

▪ Optimized microstepping via six bit linear DACs

▪ Programmable mixed, fast, and slow current decay modes

▪ 4 MHz internal oscillator for digital timing

▪ Serial interface controls chip functions

▪ Synchronous rectification for low power dissipation

▪ Internal UVLO and thermal shutdown circuitry

▪ Crossover-current protection

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

six 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.

▪ Inputs compatible with 5 or 3.3 V control signals

▪ Sleep and Idle modes

Synchronousrectificationcircuitryallowstheloadcurrenttoflow

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

decay. This feature eliminates the need for external clamp diodes

in most applications, saving cost and external component count,

while minimizing power dissipation.

Packages

24 pin batwing DIP (sufﬁx B) and 24 pin TSSOP with

exposed thermal pad (sufﬁx LP)

Internal circuit protection includes short-to-ground, shorted load,

thermalshutdownwithhysteresis,andcrossovercurrentprotection.

Special power up sequencing is not required.

TheA3992 is supplied in a thin profile (1.2 mm maximum height)

24 pin TSSOP (suffix LP) with exposed thermal pad and a 24 pin

plasticDIPwithdualcopper batwingtabs(suffixB).Theexposed

thermalpadontheLPisatgroundpotentialandneedsnoelectrical

isolation. Both packages are lead (Pb) free with 100% matte tin

leadframe plating.

LP package approximate scale

Typical Application

0.22 μF

VREG

VDD

0.22 μF

CP1

CP2

VCP

0.22 μF

10 μF

5 kΩ

VBB1

VBB2

ROSC

Microcontroller or

Controller Logic

A3992

100 μF

0.1 μF

CLOCK

DATA

OUT1A

OUT1B

SENSE1

STROBE

REF

OUT2A

OUT2B

SLEEP

SENSE2

0.1 μF

3992DS

12 3 4 5 6 7...13

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与A3992SBT-相关器件

型号	品牌	获取价格	描述	数据表
A3992SLP-T	ALLEGRO	获取价格	DMOS Dual Full-Bridge Microstepping PWM Motor Driver
A3992SLPTR-T	ALLEGRO	获取价格	DMOS Dual Full-Bridge Microstepping PWM Motor Driver
A3992_13	ALLEGRO	获取价格	DMOS Dual Full-Bridge Microstepping PWM Motor Driver
A3995	ALLEGRO	获取价格	DMOS Dual Full Bridge PWM Motor Driver
A3995SEV-T	ALLEGRO	获取价格	DMOS Dual Full Bridge PWM Motor Driver
A3995SEVTR-T	ALLEGRO	获取价格	DMOS Dual Full Bridge PWM Motor Driver
A3998	ALLEGRO	获取价格	Designed to provide the motor driver and power supply requirements for printers and office
A3998SETTR-T	ALLEGRO	获取价格	IC MTR DRVR BIPOLAR 3-5.5V 32QFN
A399A	POWEREX	获取价格	Rectifier Diode, 1 Element, 250A, 100V V(RRM),
A399B	POWEREX	获取价格	Rectifier Diode, 1 Element, 250A, 200V V(RRM),

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