Product Summary

The A3979SLP is a complete microstepping motor driver with built-in translator, designed as a pin-compatible replacement for the successful A3977, with enhanced microstepping (1/16 step) precision. The A3979SLP is designed to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2.5 A. The A3979SLP includes a fixed off-time current regulator that has the ability to operate in Slow, Fast, or Mixed decay modes. This current-decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.

Parametrics

A3979SLP absolute maximum ratings: (1)Output Current IOUT: ±2.5A; (2)Logic Supply Voltage VDD: 7.0 V; (3)Logic Input Voltage Range VIN tW＞30 ns: –0.3 to VDD + 0.3 V; (4)tW＜30 ns: –1 to VDD + 1 V; (5)Sense Voltage VSENSE: 0.5 V; (6)Reference Voltage VREF: VDD V; (7)Package Power Dissipation PD: See page 5; (8)Operating Ambient Temperature TA Range S: –20 to 85℃; (9)Junction Temperature TJ (max): 150℃; (10)Storage Temperature Tstg:–55 to 150℃.

Features

A3979SLP features: (1)±2.5 A, 35 V output rating; (2)Low RDS(On)outputs: 0.28 Ω source, 0.22 Ω sink, typical; (3)Automatic current decay mode detection/selection; (4)3.0 to 5.5 V logic supply voltage range; (5)Slow, Fast or Mixed current decay modes; (6)Home output; (7)Synchronous rectification for low power dissipation; (8)Internal UVLO and thermal shutdown circuitry; (9)Crossover-current protection.

Diagrams

A3979SLP Pin Configuration

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
A3979SLP
A3979SLP

IC DRIVER MICROSTEPPING 28-TSSOP
Data Sheet
Negotiable 
A3979SLP-T
A3979SLP-T

IC MOTOR DRIVER MICROSTEP 28-TSS
Data Sheet
0-400: $2.66
A3979SLPTR-T
A3979SLPTR-T

IC DRIVER MICROSTEPPING 28-TSSOP
Data Sheet
0-4000: $2.16
4000-8000: $2.08
8000-12000: $2.04
12000-28000: $1.99
A3979SLPTR
A3979SLPTR

IC DRIVER MICROSTEPPING 28-TSSOP
Data Sheet
Negotiable