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L6460 数据表(PDF) 22 Page - STMicroelectronics |
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L6460 数据表(HTML) 22 Page - STMicroelectronics |
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22 / 139 page  Electrical specifications L6460 22/139 Doc ID 17713 Rev 1 tdelay Current limit delay time 5 μs tOC_off Over current Off time MtrXIlimitOffTimeY[1:0]=00 MtrXIlimitOffTimeY[1:0]=01 MtrXIlimitOffTimeY[1:0]=10 MtrXIlimitOffTimeY[1:0]=11 (19) 60 120 240 480 µs µs µs µs tr1_2 Output rise time bridges 1 and 2 VSupply = 36V, resistive load between outputs: R= 25 Ω(20) 100 180 250 ns tr3_4 Output rise time bridges 3 and 4 VSupply = 36V, resistive load between outputs: R= 36 Ω(20) 50 100 200 ns tf1_2 Output fall time bridges 1 and 2 VSupply = 36V, resistive load between outputs: R= 25 Ω(20) 100 180 250 ns tf3_4 Output fall time bridges 3 and 4 VSupply = 36V, resistive load between outputs: R= 36 Ω(20) 50 125 250 ns tdeadRise Anti crossover rising dead time 100 300 450 ns tdeadFall Anti crossover falling dead time 100 300 450 ns FPWM Operating frequency Fosc/51 2 kHz tresp Delay from PWM to output transition 500 ns Bipolar stepper circuitry VSTEPREF Reference voltage SelStepRef =0 SelStepRef =1 0.48 0.72 0.50 0.75 0.52 0.78 V Voffset Sense comparator offset -12 12 mV tblk Blanking time StepBlkTime = ‘00’ (8) 0.65 0.95 1.25 µs StepBlkTime = ‘01’ 1 1.45 1.9 µs StepBlkTime = ‘10’ 1.5 2.25 3 µs StepBlkTime = ‘11’ 3 4.25 5.5 µs Synchronous buck regulator (bridge 3) VAUX_SW Output pin voltage range (DC3x) (26) -1 VSupply V IQ Output leakage current Tjunction = 125°C -50 +50 µA IQLP Output leakage current in “Low Power Mode” VSupply = 36V Tjunction = 125°C -10 +10 µA Table 5. Electrical characteristics (continued) Parameter Description Test condition Min Typ Max Unit |
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