BA6444FP

Motor driver ICs 3-phase motor driver BA6444FP The BA6444FP is a 3-phase, full-wave, pseudo-linear motor driver suited for VCR capstan motors. The IC has a torque ripple cancellation circuit to reduce wow and flutter, and a forced brake circuit that allows abrupt change of operational mode. The output transistor saturation prevention circuit provides superb torque control over a wide range of current. FG and hysteresis amplifiers are also built in. FApplications VCR capstan motors, DAT capstan motors FFeatures 1) 3-phase, full-wave, pseudo-linear drive system. 2) Torque ripple cancellation circuit. 3) Forced brake circuit. 4) Output transistor (high- and low-sides) saturation prevention circuit. 5) FG and hysteresis amplifiers. 6) Thermal shutdown circuit. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions 634 Motor driver ICs FBlock diagram BA6444FP 635 Motor driver ICs FPin descriptions BA6444FP 636 Motor driver ICs FInput / output circuits (1) I / O circuit interface Resistances, in Ω, are typical values. Note that the resistance values can vary "30%. 1) ED / S pin (2 pin) 2) BRK pin (3 pin) BA6444FP 3) Motor output (A1: 5 pin, A2: 6 pin, A3: 9 pin) 4) EC and ECR pins (10 pin, 11 pin) 5) TL pin (12 pin) 6) Hall signal input pins (H1): 27 pin, H1*: 26 pin, H2): 25 pin, H2*: 24 pin, H3): 23 pin, H3): 22 pin) 637 Motor driver ICs 7) Schmitt trigger amplifier I / O pins (17 pin, 16 pin) BA6444FP 8) Amplifier I / O pins (20 pin, 19 pin,...