Datasheet A4988 (Allegro) - 4
| 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 / 4 — 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. ELECTRICAL CHARACTERISTICS [1]:. Characteristics
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DMOS Microstepping Driver A4988 with Translator and Overcurrent Protection ELECTRICAL CHARACTERISTICS [1]:
Valid at TA = 25°C, VBB = 35 V (unless otherwise noted)
Characteristics Symbol Test Conditions Min. Typ. [2] Max. Units OUTPUT DRIVERS
Operating 8 – 35 V Load Supply Voltage Range VBB During Sleep Mode 0 – 35 V Logic Supply Voltage Range VDD Operating 3 – 5.5 V Source driver, I Output On-Resistance R OUT = –1.5 A – 320 430 mΩ ds(on) Sink driver, IOUT = 1.5 A – 320 430 mΩ Source diode, I Body Diode Forward Voltage V F = –1.5 A – – 1.2 V F Sink diode, IF = 1.5 A – – 1.2 V fPWM < 50 kHz – – 4 mA Motor Supply Current IBB Operating, outputs disabled – – 2 mA Sleep Mode – – 10 µA fPWM < 50 kHz – – 8 mA Logic Supply Current IDD Outputs off – – 5 mA Sleep Mode – – 10 µA
CONTROL LOGIC
V Logic Input Voltage IN(1) VDD × 0.7 – – V VIN(0) – – VDD × 0.3 V I Logic Input Current IN(1) VIN = VDD × 0.7 –20 <1.0 20 µA IIN(0) VIN = VDD × 0.3 –20 <1.0 20 µA RMS1 MS1 pin – 100 – kΩ Microstep Select RMS2 MS2 pin – 50 – kΩ RMS3 MS3 pin – 100 – kΩ Logic Input Hysteresis VHYS(IN) As a % of VDD 5 11 19 % Blank Time tBLANK 0.7 1 1.3 μs OSC = VDD or GND 20 30 40 μs Fixed Off-Time tOFF ROSC = 25 kΩ 23 30 37 μs Reference Input Voltage Range VREF 0 – 4 V Reference Input Current IREF –3 0 3 μA VREF = 2 V, %ITripMAX = 38.27% – – ±15 % Current Trip-Level Error [3] errI VREF = 2 V, %ITripMAX = 70.71% – – ±5 % VREF = 2 V, %ITripMAX = 100.00% – – ±5 % Crossover Dead Time tDT 100 475 800 ns
PROTECTION
Overcurrent Protection Threshold [4] IOCPST 2.1 – – A Thermal Shutdown Temperature TTSD – 165 – °C Thermal Shutdown Hysteresis TTSDHYS – 15 – °C VDD Undervoltage Lockout VDDUVLO VDD rising 2.7 2.8 2.9 V VDD Undervoltage Hysteresis VDDUVLOHYS – 90 – mV [1] For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin. [2] Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for indi- vidual units, within the specified maximum and minimum limits. [3] VERR = [(VREF/8) – VSENSE] / (VREF/8). [4] Overcurrent protection (OCP) is tested at TA = 25°C in a restricted range and guaranteed by characterization. 4 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com
Valid at TA = 25°C, VBB = 35 V (unless otherwise noted)
Characteristics Symbol Test Conditions Min. Typ. [2] Max. Units OUTPUT DRIVERS
Operating 8 – 35 V Load Supply Voltage Range VBB During Sleep Mode 0 – 35 V Logic Supply Voltage Range VDD Operating 3 – 5.5 V Source driver, I Output On-Resistance R OUT = –1.5 A – 320 430 mΩ ds(on) Sink driver, IOUT = 1.5 A – 320 430 mΩ Source diode, I Body Diode Forward Voltage V F = –1.5 A – – 1.2 V F Sink diode, IF = 1.5 A – – 1.2 V fPWM < 50 kHz – – 4 mA Motor Supply Current IBB Operating, outputs disabled – – 2 mA Sleep Mode – – 10 µA fPWM < 50 kHz – – 8 mA Logic Supply Current IDD Outputs off – – 5 mA Sleep Mode – – 10 µA
CONTROL LOGIC
V Logic Input Voltage IN(1) VDD × 0.7 – – V VIN(0) – – VDD × 0.3 V I Logic Input Current IN(1) VIN = VDD × 0.7 –20 <1.0 20 µA IIN(0) VIN = VDD × 0.3 –20 <1.0 20 µA RMS1 MS1 pin – 100 – kΩ Microstep Select RMS2 MS2 pin – 50 – kΩ RMS3 MS3 pin – 100 – kΩ Logic Input Hysteresis VHYS(IN) As a % of VDD 5 11 19 % Blank Time tBLANK 0.7 1 1.3 μs OSC = VDD or GND 20 30 40 μs Fixed Off-Time tOFF ROSC = 25 kΩ 23 30 37 μs Reference Input Voltage Range VREF 0 – 4 V Reference Input Current IREF –3 0 3 μA VREF = 2 V, %ITripMAX = 38.27% – – ±15 % Current Trip-Level Error [3] errI VREF = 2 V, %ITripMAX = 70.71% – – ±5 % VREF = 2 V, %ITripMAX = 100.00% – – ±5 % Crossover Dead Time tDT 100 475 800 ns
PROTECTION
Overcurrent Protection Threshold [4] IOCPST 2.1 – – A Thermal Shutdown Temperature TTSD – 165 – °C Thermal Shutdown Hysteresis TTSDHYS – 15 – °C VDD Undervoltage Lockout VDDUVLO VDD rising 2.7 2.8 2.9 V VDD Undervoltage Hysteresis VDDUVLOHYS – 90 – mV [1] For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin. [2] Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for indi- vidual units, within the specified maximum and minimum limits. [3] VERR = [(VREF/8) – VSENSE] / (VREF/8). [4] Overcurrent protection (OCP) is tested at TA = 25°C in a restricted range and guaranteed by characterization. 4 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com