... , BTN7971B default for BTS7960B several models directly have a little difference, if you need other models need ... of the relationship between the chip with 43 A~ 70 A smart car and a is enough; 3, and single ... sink; 6, single chip microcomputer to drive module with four with line can (GND, 5 v, PWM1, PWM2); ... power; 8, isolation chip 5 v power supply (with single-chip microcomputer Shared 5 v); 9, power ...