BA6402F
Motor driver ICs
2-phase half-wave motor predriver
The BA6402F is a 2-phase, half-wave motor predriver suitable for fan motors. FFeatures 1) Lock detection and rotational speed sensing mechanisms are built in. 2) Hall constant current source is built in. FBlock diagram and application example
3) pact 8-pin SOP package reduces the number of external ponents required.
FAbsolute maximum ratings (Ta = 25_C)
FRemended operating conditions
Motor driver ICs
FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 12V)
FRotational speed sensing and lock detection (6 pin) The circuit around pin 6 is described in Fig. 1. Normally, the C6 external capacitor is charging or discharging around the Hall signal when the motor is running. When the motor is locked, discharging does not occur at C6 because the Hall signal stops switching. Charging continues at C6 until the voltage increases to the pin-6 clamp voltage, and then Q1 turns ON to turn OFF the...
