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L6208PD Datasheet(PDF) 10 Page - STMicroelectronics |
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L6208PD Datasheet(HTML) 10 Page - STMicroelectronics |
10 / 27 page L6208 10/27 Figure 6. Charge Pump Circuit LOGIC INPUTS Pins CONTROL, HALF/FULL, CLOCK, RESET and CW/CCW are TTL/CMOS and uC compatible logic inputs. The internal structure is shown in Fig. 7. Typical value for turn-on and turn-off thresholds are respectively Vth(ON)= 1.8V and Vth(OFF)= 1.3V. Pin EN (Enable) has identical input structure with the exception that the drain of the Overcurrent and thermal protection MOSFET is also connected to this pin. Due to this connection some care needs to be taken in driving this pin. The EN input may be driven in one of two configurations as shown in Fig. 8 or 9. If driven by an open drain (collector) structure, a pull-up resistor REN and a capacitor CEN are connected as shown in Fig. 8. If the driver is a standard Push-Pull structure the resistor REN and the capacitor CEN are connected as shown in Fig. 9. The resistor REN should be chosen in the range from 2.2K Ω to 180KΩ. Recommended values for REN and CEN are respectively 100K Ω and 5.6nF. More information on selecting the values is found in the Overcurrent Protection section. Figure 7. Logic Inputs Internal Structure Figure 8. EN Pin Open Collector Driving Figure 9. EN Pin Push-Pull Driving D2 CBOOT D1 RP CP VS VSA VCP VBOOT VSB D01IN1328 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 |
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