The A5984 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors from full-step up to 1/32 step modes. Step modes are selectable by MSx logic inputs. It has an output drive capacity of up to 40 V and ±2 A.
A5984 introduces a proprietary QuietStepTMalgorithm to optimize the current waveform over a wide range of stepper speeds and stepper motor characteristics. QuietStepTMadjusts on-the-fly the amount of fast decay during a PWM cycle to keep current ripple at a low level over the various operating conditions. This adaptive feature improves performance of the system resulting in reduced audible motor noise, reduced vibration, and increased step accuracy.
翻译是A5984简单实现的关键。只需在步骤输入上输入一个脉冲驱动电动机一个MicroStep。没有阶段序列表，高频控制线或程序复杂接口。A5984接口是一个理想的适用于复杂微处理器不可用或负担过重的应用。雷竞技最新网址
The ET package meets customer requirements for no smoke no fire (NSNF) designs by adding no-connect pins between critical output, sense, and supply pins. So, in the case of a pin-to-adjacent-pin short, the device does not cause smoke or fire. Additionally, the device does not cause smoke or fire when any pin is shorted to ground or left open.
Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power-on sequencing is not required.
The A5984 is supplied in three surface mount packages: two QFN packages, the 4 mm × 4 mm, 0.75 mm nominal overall height ES package, and the 5vmm × 5 mm × 0.90 mm ET package. The LP package is a 24‑pin TSSOP. All three packages have exposed pads for enhanced thermal dissipation, and are lead (Pb) free (suffix –T), with 100% matte-tin-plated leadframes.
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