LB1687M

The LB1687M is a 3-phase brushless motor driver IC ideally suited for use in VCR capstan motor, drum motor drive applications.

The LB1687M has the following features:(1)120°voltage liner type;(2)soft switching type eliminating noises caused by current swutching and making the values of externalcapacitors amaller(comparable to those of chip capacaitors)(3)on-chip FG amplifier;(4)on-chip thermal shutdown circuit;(5)FG signal can be used to detect the rotational speed of a motor so that the hall amp gain is changed in two steps,thus reducing torque ripple and noise;(6)motor drivable at voltage down to motor supply voltage 5V.

LB1687M also has some outstanding absolute maximun ratings(Ta=25°C) and electrical characteristics(Ta=25°C,VCC1=12 V,VCC2=5V).Absolute maximun ratings:(1):maximum supply voltage is 20 V;(2)output current is 1.5 A;(3)allowale po wer dissipation is 1.05 W;(4)operating temperature is -20 to+75;(5)storage temperature is -55 to +125;(6): output supply voltage is 22 V;electrical characteristics:(1):supply voltage is 5 V to 18 V;(2)supply current 1 is 17 mA typ and 30 mA max when VC is 0 and RL is ;supply current 2 is 6.5 mA typ and 9.5 mA max when VC is 0;(3):output saturation voltage is 1.6 V typ and 2.2V max when I out is 0.5 A sink and source;output saturation voltage is 2.0 V typ and 3.0 V max when I out is 1.0 A sink and source;output TRS withstand voltage is 20 V min when Iout is 20 mA;output static voltage is 5.8 V min,6.1 V typ and 6.4 V max when VC is 0;(4)hall Amp input offset voltage is -5 mV min and +5 mV max;hall Amp input bias current is 1 uA typ and 5 uA max;hall amp common-mode is 1.3 V min and 3.7 V max;hall input-output voltage gain is 56 dB typ;(5)control-output drive gain is 38 dB min,41 dB typ and 44 dB max;(6):open-loop voltage gain is 60 dB typ when f is 1kHz.etc.