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VND670SP датащи(PDF) 12 Page - STMicroelectronics |
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VND670SP датащи(HTML) 12 Page - STMicroelectronics |
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12 / 20 page ![]() Application information VND670SP 12/20 Figure 8. Typical application circuit for a 20 KHz PWM operation Note: 1 Reverse battery protection: series relay in VCC line: Rgnd = 0 Ohms; series fuse in VCC line with antiparallel diode between ground and VCC: Rgnd=10 Ohms. 3.1 Normal operating conditions Note: 1 In normal operating conditions the DIAGX/ENX pin is considered as an input pin by the device. This pin must be externally pulled high. 2 PWM pin usage: In all cases, a “0” on the PWM pin will turn-off both GATEA and GATEB outputs. When PWM rises back to “1”, GATEA or GATEB turn on again depending on the input pin state. M UP DOWN OUTA OUTB GATEB GATEA External VND670SP VCC PWM Power Mos A External Power Mos B DIAGB/ENB R1 +5V Rprot Rprot INB 1K 1K Rprot INA 1K DIAGA/ENA R1 +5V Rprot 1K Rprot 1K Rgnd(*) D1 D2 27 Ω 27 Ω Table 11. Truth table in normal operating conditions INA INB DIAGA/ENA DIAGB/ENB OUTA OUTB GATEA GATEB Comment 1 1 1 1 H H L L Brake to VCC 1 0 1 1 H L L H Clockwise 0 1 1 1 L H H L Counter cw 0 0 1 1 L L H H Brake to GND X X 0 0 L L L L Stand by 1X 1 0 H L L L HSA only 0X 1 0 L L H L MOSA only X1 0 1 L H L L HSB only X0 0 1 L L L H MOSB only |
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