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L6227Q Fiches technique(PDF) 11 Page - STMicroelectronics |
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L6227Q Fiches technique(HTML) 11 Page - STMicroelectronics |
11 / 27 page L6227Q Circuit description 11/27 4.2 Logic inputs Pins IN1A, IN2B, IN1B and IN2B are TTL/CMOS and microcontroller compatible logic inputs. The internal structure is shown in Figure 6. Typical value for turn-on and turn-off thresholds are respectively Vthon = 1.8 V and Vthoff = 1.3 V. Pins ENA and ENB have identical input structure with the exception that the drains of the Overcurrent and thermal protection MOSFETs (one for the bridge A and one for the bridge B) are also connected to these pins. Due to these connections some care needs to be taken in driving these pins. The ENA and ENB inputs may be driven in one of two configurations as shown in Figure 7 or Figure 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 R EN and the capacitor CEN are connected as shown in Figure 8. The resistor R EN should be chosen in the range from 2.2 k Ω to 180 kΩ. Recommended values for R EN and CEN are respectively 100 kΩ and 5.6 nF. More information on selecting the values is found in the overcurrent protection section. Figure 6. Logic inputs internal structure Figure 7. ENA and ENB pins open collector driving Figure 8. ENA and ENB pins push-pull driving 5V D01IN1329 ESD PROTECTION 5V 5V OPEN COLLECTOR OUTPUT REN CEN EN D01IN1330 ESD PROTECTION 5V PUSH-PULL OUTPUT REN CEN EN D01IN1331 ESD PROTECTION |
Numéro de pièce similaire - L6227Q |
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Description similaire - L6227Q |
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