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A3957SLB

A3957SLB
型号:A3957SLB
品牌:ALLEGRO ALLEGRO
批号:13+
封装:SOP24
原价:3.5
数量:85230
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订购电话:86755-83294757
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备注:100% brand new and original (100% 全新原装)
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详细描述
The A3957SA and A3957SLB are designed for driving one winding of a
bipolar stepper motor in a microstepping mode. The outputs are rated for
continuous output currents to ±1.5 A and operating voltages to 50 V. Internal
pulse-width modulated (PWM) current control combined with an internal
four-bit nonlinear digital-to-analog converter allows the motor current to be
controlled in full-, half-, quarter-, eighth-, or sixteenth-step (microstepping)
modes. Nonlinear increments minimize the number of control lines necessary
for microstepping. Microstepping provides for increased step resolution, and
reduces torque variations and resonance problems at low speed.
Internal circuitry determines whether the PWM current-control circuitry
operates in a slow (recirculating) current-decay mode, fast (regenerative)
current-decay mode, or in a mixed current-decay mode in which the off time
is divided into a period of fast current decay with the remainder of the fixed
off time spent in slow current decay. The combination of user-selectable
current-sensing resistor and reference voltage, digitally selected output
current ratio; and slow, fast, or mixed current-decay modes provides users
with a broad, variable range of motor control.
Internal circuit protection includes thermal shutdown with hysteresis,
transient-suppression diodes, and crossover current protection. Special
power-up sequencing is not required.
The A3957S— is supplied in a choice of two power packages; a 16-pin
dual-in-line plastic package (suffix ‘A’), and a 24-lead plastic SOIC with
copper heat-sink tabs (suffix ‘LB’). The power tab is at ground potential and
needs no electrical isolation.
FEATURES
■ ±1.5 A Continuous Output Current
■ 50 V Output Voltage Rating
■ Internal PWM Current Control
■ 4-Bit Non-Linear DAC for 16-Bit Microstepping
■ Satlington™ Sink Drivers
■ Fast, Mixed Fast/Slow, and Slow Current-Decay Modes
■ Internal Transient-Suppression Diodes
■ Internal Thermal-Shutdown Circuitry

■ Crossover-Current and UVLO Protection

由于客户采购批量与样品的价格不同,网上无法统一注明,请您把采购型号通过邮件或客服QQ:2850151585 发给我们,也可以拨打明佳达国内销售部电话:0755-83957301,由客服人员为您报价;有时元件厂商价格稍许变动,本公司未能及时调整,如您觉得售价稍高,请与我们说明并适当议价,感谢支持!

 

 

MJD is a corporation which engaged in agency electronic components. MJD Through seventeen years unrimitting efforts,  aspire to provide our customers with world-leading products and service. Now already became a one of the most famous electronic components distributor in China.

 

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PAYMENTS:

 

We support the following payment methods:

 

1. Paypal

2. Western Union 

3. Bank Wire (TT)

4. MoneyGram

 

Shipping:

 

1. MJD needs about 3 BUSINESS DAY to handle the order after received payment. after receiving your payment. Otherwise, we will state it in the invoice in advance.

 

2. MJD can Ship via your shipping account (DHL / FEDEX / UPS / TNT or others) as your instruction. Or Ship via our shipping account (We have a very good relationship with DHL and FEDEX with very special freight).

 

3. Regarding the declared value on the package for customs clearance, we are pleased to follow your wishes, just feel free to inform us when ordering.

 

4. Any import fees or charges are the buyer's responsibility.

 

REFUNDS & RETURN:

 

We offer a warranty on all items that we sold. Item will be tested before ship,it will be in good condition,if there are some problems with the item,feel free to contact us.Please Email us to notify a defective item. Unless otherwise specified, this item comes with 30 days warranty from the shipment date.

 

You must contact us before returning any product. All returns must be made within 30 days from this shipment date.Return must be in new condition(the SAME CONDITION as it was sent to you)

 

Because of wholesale price is different from sample price, our website can not state. Please send your required part number via email Sales@hkmjd.com or skype id mjdccm898 to us.  As well as welcome you call us : 0755-83957301  We will send offer for you; Sometimes manufacturer's price is unstable, so we don't adjust price in time. if you feel price is a little high for you, just feel free to contact us for consultation. Thank you for your support ! 

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