TA7712F Datasheet | Toshiba

FEATURES l FG is not required. (System for obtaining rotation signal through position sensing) l Start / stop, CW / CCW and brake functions are provided. l Gain of position sensing circuit is high, and hysteresis is provided. l Rotation signal output is provided. (Frequency signal of three times the position sensing output (hall sensor output) can be obtained.) l External transistor type. Weight DIP20- P- 300- 2.54A : 2.25 g (Typ.) SSOP24- P- 300- 1.00 : 0.32 g (Typ.) 1 2001-06-13 BLOCK DIAGRAM TA7712P/F TA7712P / TA7712F 2 2001-06-13 PIN FUNCTION PIN No. PF 11 22 33 45 56 67 78 8 10 9 11 10 12 11 13 12 14 13 ― 14 17 15 18 16 19 17 20 18 22 19 23 20 24 SYMBOL FUNCTION DESCRIPTION La+ a- phase upper drive output terminal La- a- phase lower drive output terminal Lb+ b- phase upper drive output terminal Lb- b- phase lower drive output terminal Lc+ c- phase upper drive output terminal Lc- c- phase lower drive output terminal GND terminal START / STOP START / STOP switch terminal CW / CCW Forward rotation / Reverse rotation switch terminal BRAKE Break terminal FGOUT N. C. Hc- Hc+ Hb- Hb+ Ha- Ha+ FG signal output terminal C, R connection terminal Non connection c- phase Hall Amp. negative c- phase Hall Amp. positive input terminal b- phase Hall Amp. negative input terminal b- phase Hall Amp. positive input terminal a- phase Hall Amp. negative input terminal a- phase Hall Amp. positive input terminal Power supply input terminal F: (4), (9), (15), (16), (21) pin: non connection TA7712P/F 3 2001-06-13 TIMING CHART Forward rotation (Position sensing signal advances Ha → Hb → Hc.) TA7712P/F Reverse rotation (Position sensing signal advances Ha → Hc → Hb.) 4 2001-06-13 TA7712P/F APPLICATION OF TA7712P, TA7712F Like a video disk player, TA7712P, TA7712F is provided with the stopping function which in a short time, stops the motor having a large inertia, and makes the quick disk- change possible. To make the frequency generator (FG) unnecessary which was...