First, the most used H-bridge driver chip: L928N
This chip is very simple, very cheap, and easy to buy, a chip inside the integration of 2 H-bridge circuit, also with PWM control and current acquisition. But it has two serious drawbacks:
1) The manual requires the motor drive voltage to be 2.5V higher than the control logic voltage. Not suitable for single power supply car.
2) The loss on the H-bridge circuit is too great.
Two, triode H bridge
The most simple and practical circuit, I have dismantled several toy cars, using the triode H bridge circuit.
The bridge with 8550 8050 for low power: When the 5V power supply is used to drive a small motor of about 100mA, the voltage drop on the bridge is less than 0.5V. The bridge of D772 D882 with large current: at 7.2V power supply, 200-300mA current, voltage drop is less than 1V. 3. MOS Tube bridge
MOS tube efficiency is definitely the highest. But there are two problems:
1) The MOS tube is relatively fragile, and it needs great attention when using, such as carefully studying the timing when switching on, otherwise it is easy to cause the bridge through and burn the MOS tube;
2) The high-power MOS gate requires a relatively high driving voltage, otherwise it can not be normally switched on, so when the battery is driven, it is also necessary to add a booster circuit.