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| 型号： | A4989SLDTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC FULL BRDG MFET DRVR 38TSSOP |
| 标准包装： | 1 |
| 应用： | 步进电机控制器，2 相 |
| 输出数： | 1 |
| 电压 - 负载： | 12 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-TFSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 38-TSSOP |
| 包装： | 标准包装 |
| 其它名称： | 620-1389-6 |
A4989
Dual Full-Bridge MOSFET Driver
with Microstepping Translator
Features and Benefits
Description
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2-wire step and direction interface
Dual full-bridge gate drive for N-channel MOSFETs
Operation over 12 to 50 V supply voltage range
Synchronous rectification
Cross-conduction protection
Adjustable mixed decay
Integrated sinusoidal DAC current reference
Fixed off-time PWM current control
Enhanced low current control when microstepping
Pin compatible with the A3986
The A4989 is a dual full-bridge gate driver with integrated
microstepping translator suitable for driving a wide range of
higher power industrial bipolar 2-phase stepper motors (typically
30 to 500 W). Motor power is provided by external N-channel
power MOSFETs at supply voltages from 12 to 50 V.
This device contains two sinusoidal DACs that generate the
reference voltage for two separate fixed-off-time PWM current
controllers. These provide current regulation for external power
MOSFET full-bridges.
Motor stepping is controlled by a two-wire step and direction
interface, providing complete microstepping control at full-,
half-, quarter-, and sixteenth-step resolutions. The fixed-off
time regulator has the ability to operate in slow-, mixed-, or
Package: 38 pin TSSOP (suffix LD)
Approximate size
fast-decay modes, which results in reduced audible motor noise,
increased step accuracy, and reduced power dissipation.
The translator is the key to the easy implementation of this
IC. Simply inputting one pulse on the STEP input drives the
motor one step (full, half, quarter, or sixteenth depending on
the microstep select input). There are no phase-sequence tables,
high frequency control lines, or complex interfaces to program.
This reduces the need for a complex microcontroller.
Continued on the next page…
Typical Application Diagram
4989-DS, Rev. 1
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相关代理商/技术参数 |
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|---|---|
| A4990KLPTR-T | 制造商:Allegro MicroSystems LLC 功能描述:IC DVR FULL BRIDGE DUAL 20TSSOP 制造商:ALLEGRO 功能描述:AUTOMOTIVE DUAL FULL BRIDGE DR 制造商:Allegro MicroSystems LLC 功能描述:AUTOMOTIVE DUAL FULL BRIDGE DR |
| A4992KLPTR-T | 制造商:Allegro MicroSystems LLC 功能描述:AUTOMOTIVE STEPPER MOTOR DRIVE |
| A4993KLPTR-T | 功能描述:IC MOTOR DVR STEP AUTO 制造商:allegro microsystems, llc 系列:* 零件状态:有效 标准包装:4,000 |
| A4994KLPTR-T | 功能描述:IC DVR FULL BRIDGE DUAL 20TSSOP 制造商:allegro microsystems, llc 系列:* 零件状态:在售 标准包装:4,000 |
| A49FL004 | 制造商:AMICC 制造商全称:AMIC Technology 功能描述:4 Mbit CMOS 3.3Volt-only Firmware Hub/LPC Flash Memory |
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