BA6871 Rohm, BA6871 Datasheet
BA6871
Available stocks
Related parts for BA6871
BA6871 Summary of contents
Page 1
... BA6871BS The BA6871BS 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 an output transistor saturation prevention circuit that provides superb motor control over a wide range of current. The built-in motor power series regulator allows applications with low power consumption ...
Page 2
... Motor driver ICs FBlock diagram 674 BA6871BS ...
Page 3
... Motor driver ICs FPin descriptions BA6871BS 675 ...
Page 4
... Motor driver ICs FInput / output circuits (1) Driver output (2) Hall input (4) Torque control input 676 ( (5) Torque limit and current sensing BA6871BS ...
Page 5
... Motor driver ICs (6) Series regulator (7) Amplifier BA6871BS 677 ...
Page 6
... Motor driver ICs FElectrical characteristics (unless otherwise noted 25_C, V 678 = 5V 12V, AMP*V CC1 M CC2 BA6871BS = 12V) CC ...
Page 7
... The output current (I ) under this condition is given by: MAX. *(TL* 12P ofs I = MAX. R 31P where R is the value of the resistor connected between 31P pin 31 and the ground the voltage applied to pin 12P 12, and (TL* the offset between the TL and CS ofs pins. BA6871BS 679 ...
Page 8
... Series regulator The BA6871BS has a series regulator output pin. The IC outputs a sink current according to the HIGH level output voltage detected. 680 As shown in Fig. 14, the regulator circuit reduces the power consumed by the IC by reducing the collector-to- emitter (C-E) voltage of the driver transistors ...
Page 9
... Motor driver ICs FApplication example BA6871BS 681 ...
Page 10
... Motor driver ICs FOperation notes The BA6871BS has two thermal shutdown circuits (TSD1 and TSD2) to protect the IC. The typical shutdown temperatures are 175_C for TSD1 and 215_C for TSD 2. When the TSD1 is activated at an elevated chip tempera- ture, the output pins (pins 1, 3, and 30) are set to the open state ...
Page 11
... Motor driver ICs FExternal dimensions (Units: mm) BA6871BS 683 ...