AN6657 schematic block diagram and basic application circuit
Source: InternetPublisher:fish001 Keywords: Application circuit BSP electric motor Updated: 2021/12/02
AN6657 is a 16-pin dual in-line plastic package, and AN 6657S is a 16-pin dual-in-line
flat plastic package.
1. Working principle of steady speed control: There is an H-bridge drive circuit inside the chip.
Pins 5 and 8 are the H-bridge drive outputs and are connected to the controlled motor . When pin 5 is positive, the motor rotates forward;
when pin 8 is positive, the motor rotates reversely. The positive power supply of H bridge is pin 9 and pin 11, which
is connected to vcc through external resistor r. The lower arm of the H bridge is connected to pin 6 and connected to the ground via an external NPN transistor.
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