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L6207Q Datasheet(PDF) 11 Page - STMicroelectronics |
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L6207Q Datasheet(HTML) 11 Page - STMicroelectronics |
11 / 27 page DocID018993 Rev 3 11/27 L6207Q Circuit description 27 5.2 Logic inputs Pins IN1A, IN2A, IN1B and IN2B are TTL/CMOS and µC compatible logic inputs. The internal structure is shown in Figure 6. Typical values for turn-on and turn-off thresholds are respectively Vth(ON) = 1.8 V and Vth(OFF) = 1.3 V. Pins ENA and ENB have identical input structures with the exception that the drains of the overcurrent and thermal protection MOSFETs (one for bridge A and one for bridge B) are also connected to these pins. Due to these connections, some care must be taken in driving these pins. Two configurations are shown in Figure 7 and 8. If driven by an open drain (collector) structure, a pull-up resistor REN and a capacitor CEN are connected, as shown in Figure 7. If the driver is a standard push-pull structure, the resistor REN and the capacitor CEN are connected, as shown in Figure 8. The resistor REN should be chosen in the range from 2.2 k to 180 k. Recommended values for REN and CEN are respectively 100 k and 5.6 nF. More information on selecting the values is found in Section 5.5. Figure 6. Logic inputs internal structure Figure 7. ENA and ENB pins open collector driving Figure 8. ENA and ENB pins push-pull driving |
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