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A3977SLP-T converters with DMOS micro-stepping motor driver
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| Specifications |
A3977SLP-T |
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Feature
¡ñ¡À 2.5 Ma rate of 35 V output
¡ñLow rDS (ON) output (typically 0.45 EU source, 0.36 Euro sink)
¡ñSince the drive current decay mode ***ection / selection
¡ñ3.0 to 5.5 V logic supply voltage range
¡ñMixed fast and slow current - decay mode
¡ñAuto-oriented output
¡ñSynchronous rectification for low power dissipation
¡ñInternal under voltage lockout (UVLO) and thermal shutdown circuit
¡ñCross-current protection
Description
A3977SED and A3977SLP are two complete micro stepping motor driver with built-in converter. Both in whole, 1 / 2, 1 / 4 and 1 / 8 step modes operate bipolar stepper motors, the output drive capability of 35 V and ¡À 2.5 amps. A3977 includes a fixed off-time current regulator; the regulator is in low, fast or mixed decay modes. This current decay control scheme results in reduced audible motor noise, increased step accuracy and reduced power dissipation.
Converter is the key to the easy implementation of A3977. Simple in the "step" input, enter a pulse, the motor will have step (full, 1 / 2, 1 / 4 or 1 / 8 step, according to the two logic inputs of the case may be). There are no phase sequence tables, high frequency control lines or complex interfaces. A3977 interface is ideal for complex ¦ÌP is unavailable or is overburdened.
Internal synchronous rectification control circuitry is used to improve the pulse-width modulation (PWM) operation of the power consumption.
Internal circuit protection includes thermal shutdown with hysteresis, under voltage lockout (UVLO) and crossover current protection. No special power-up sequencing.
A3977 has two power packages to choose from, with a copper batwing that 44-pin plastic PLCC chip, and with an exposed thermal pad (suffix LP) of thin (<1.2 mm) 28-pin TSSOP. The SLP package is lead-free products, and the lead frame with 100% matte tin plating.
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| Company: |
Shenzhen Sumzi Elec Co., Ltd
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| Contact: |
Mr. Lei Liu |
| Address: |
27/F, Jia He Ge Unit, Jiahui Xincheng,Fuming Rd, Futian District |
| Postcode: |
518033 |
| Tel: |
86 755 83299282 |
| Fax: |
86 755 22645259 |
| E-mail: |
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