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STA6940M Arkusz danych(PDF) 3 Page - Allegro MicroSystems |
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STA6940M Arkusz danych(HTML) 3 Page - Allegro MicroSystems |
3 / 19 page Brushed DC Motor Driver IC With PWM Control STA6940M 3 ELECTRICAL CHARACTERISTICS valid at TA = 25°C, VBB = 24 V, VDD = 5 V; unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. Max. Unit Main Supply Current IBB Operating – – 20 mA Logic Supply Current IDD – – 5 mA Charge Pump Voltage Vcp VBB = 10 to 40 V – VBB + 5 – V Charge Pump Switching Frequency fcp – 360 – kHz Main Supply Undervoltage Protection* VUVBL –7 – V VUVBH – 7.8 – V Logic Supply Undervoltage Protection* VUVDL – 2.3 – V VUVDH – 2.5 – V Charge Pump Undervoltage Protection* VUVCL – 3.8 – V VUVCH –4 – V MOSFET On Resistance RDS(on) ID = 4 A – 0.1 0.13 Ω MOSFET Body Diode Forward Voltage VF IF = 4 A – 0.95 – V MOSFET Breakdown Voltage VDSS 53 – – V Logic Input Voltage VIL – – 0.25 × VDD V VIH 0.75 × VDD –– V Logic Input Current IIL – ±1 – μA IIH – ±1 – μA Maximum Input Frequency fclk Clock duty cycle = 50% 100 – – KHz PWM_REF Pin Input Voltage VPREF PWM_REF terminal 0.1 – 1.0 V PWM_REF Pin Input Current IPREF – ±10 – μA OCP_REF Pin Input Voltage VOREF OCP_REF terminal 0.1 – 2.0 V OCP_REF Pin Input Current IOREF – ±10 – μA PWM Sensing Voltage VPSEN Sense1, Sense2 terminals VPREF – 0.045 VPREF – 0.015 VPREF + 0.015 V OCP Sensing Voltage VOSEN Sense1, Sense2 terminals VOREF – 0.045 VOREF – 0.015 VOREF + 0.015 V Sense1, Sense2 Pin Input Current ISENSE Sense1, Sense2 terminals – ±20 – μA Diag Pin Output Voltage VDIAGL IDIAGL = 1.25 mA – – 1.25 V VDIAGH IDIAGH = –1.25 mA VDD– 1.25 – – V Diag Pin Output Current IDIAGL VDIAGL = 0.5 V – – 1.25 mA IDIAGH VDIAGH = VDD – 0.5 V –1.25 – – mA Diag Pin Output Frequency fDIAG During PWM off-time – 90 – kHz PWM Minimum On-Time (Blanking Time) ton(min) –5 – μs PWM Off-Time tPOFF PWM operating – 35 – μs OCP Minimum On-Time tOON OCP operating – 5 – μs OCP Off-Time tOOFF OCP operating – 142 – μs Crossover Current Delay Timing tCOCD 150 – 750 ns Switching Time tcon Measured from input to output on – 3.0 – μs tcoff Measured from input to output off – 2.7 – μs Thermal Shutdown Activation Temperature Ttsdon Package back side surface temperature after case permeated with heat from operation – 140 – ºC Thermal Shutdown Release Temperature Ttsdoff – 115 – ºC *The outputs will be disabled if any of the three undervoltage protection circuits are operating. Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com |
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