LSI Computer Systems LS7561
The LS7560/LS7561 are CMOS integrated circuits designed to control three or four phase brushless DC motors in a closed or open loop configuration. The IC consists of a decoder which provides proper commutation sequencing, a frequency-topulse width converter and error amplifier for closed loop motor speed control, a PWM comparator and sawtooth oscillator for external driver power control and a 5.5V reference generator for supplying power to motor sensors. The overcurrent sense condition will disable all output drivers when using the LS7560 and only the bottom drivers when using the LS7561.| Part No. | LS7561 |
|---|---|
| Datasheet | LS7561 Download |
| Manufacturer |  LSI Computer Systems |
| Description | BRUSHLESS DC MOTOR CONTROLLER |
| Buy | Stock & Price |
FEATURES
● Open loop motor control● Tachometer output for closed loop motor control
● Error Amplifier and PWM Speed Comparator with full accessibility
● High noise immunity Schmitt Triggers on Sensor inputs
● 5.5V Reference Supply for external sensors
● Cycle-by-cycle current sensing
● Static, or current limited dynamic, motor braking
● Output enable delay on speed direction reversal
● Enable input with fault sensing capability
● Fault Indicator output
● 60°/300° or 120°/240° electrical sensor spacing selection
● Selectable PWM of top and bottom drivers or bottom drivers only
● CMOS compatible motor outputs with drive capability
● Selectable top driver polarity
● Low power dissipation
● +10V to +18V operation (VDD-Vss)
● LS7560, LS7561 (DIP); LS7560-SD, LS7561-SD (Skinny DIP); LS7560-S, LS7561-S (SOIC); LS7560-TS, LS7561-TS (TSSOP) See Figure 1
GENERAL DESCRIPTION
Also included is Fault detection and indication, overcurrent sensing, dynamic motor braking, forward/reverse input, sensor spacing selections and an enable input control.
