Datasheet A4988 (Allegro) - 2
| Manufacturer | Allegro |
| Description | DMOS Microstepping Driver with Integrated Translator, 1/16th Step Resolution, and Automatic Decay Selection in 28-QFN (4x5) package |
| Pages / Page | 20 / 2 — DMOS Microstepping Driver. A4988. with Translator and Overcurrent … |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
DMOS Microstepping Driver. A4988. with Translator and Overcurrent Protection. DESCRIPTION (continued). SELECTION GUIDE
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DMOS Microstepping Driver A4988 with Translator and Overcurrent Protection DESCRIPTION (continued)
Internal synchronous rectification control circuitry is provided to The A4988 is supplied in a surface-mount QFN package (ET), 5 mm improve power dissipation during PWM operation. Internal circuit × 5 mm, with a nominal overall package height of 0.90 mm and an protection includes: thermal shutdown with hysteresis, undervoltage exposed pad for enhanced thermal dissipation. It is lead (Pb) free lockout (UVLO), and crossover-current protection. Special power-on (suffix –T), with 100% matte-tin-plated leadframes. sequencing is not required.
SELECTION GUIDE Part Number Package Packing
A4988SETTR-T 28-contact QFN with exposed thermal pad 1500 pieces per 7-in. reel
ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Units
Load Supply Voltage VBB 35 V Output Current IOUT ±2 A Logic Input Voltage VIN –0.3 to 5.5 V Logic Supply Voltage VDD –0.3 to 5.5 V Motor Outputs Voltage –2.0 to 37 V Sense Voltage VSENSE –0.5 to 0.5 V Reference Voltage VREF 5.5 V Operating Ambient Temperature TA Range S –20 to 85 °C Maximum Junction TJ(max) 150 °C Storage Temperature Tstg –55 to 150 °C 2 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com
Internal synchronous rectification control circuitry is provided to The A4988 is supplied in a surface-mount QFN package (ET), 5 mm improve power dissipation during PWM operation. Internal circuit × 5 mm, with a nominal overall package height of 0.90 mm and an protection includes: thermal shutdown with hysteresis, undervoltage exposed pad for enhanced thermal dissipation. It is lead (Pb) free lockout (UVLO), and crossover-current protection. Special power-on (suffix –T), with 100% matte-tin-plated leadframes. sequencing is not required.
SELECTION GUIDE Part Number Package Packing
A4988SETTR-T 28-contact QFN with exposed thermal pad 1500 pieces per 7-in. reel
ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Units
Load Supply Voltage VBB 35 V Output Current IOUT ±2 A Logic Input Voltage VIN –0.3 to 5.5 V Logic Supply Voltage VDD –0.3 to 5.5 V Motor Outputs Voltage –2.0 to 37 V Sense Voltage VSENSE –0.5 to 0.5 V Reference Voltage VREF 5.5 V Operating Ambient Temperature TA Range S –20 to 85 °C Maximum Junction TJ(max) 150 °C Storage Temperature Tstg –55 to 150 °C 2 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com