TA7247AP Datasheet | Toshiba

FEATURES l Voltage Controlled 3 Phase Bi- Directional Motor Power Driver. l Output Current Up to 1.5 A. Weight: 8.19 g (Typ.) l High Sensitivity of Position Sensing Inputs : VH = 40 m V (Typ.) l Built in Over Current, Over Voltage, Low Voltage and Thermal Protect Circuit. l More Power- up Applications with Additional Power Transistors. l Remended Supply Voltage : VCC1 (opr.) = 0~30 V VCC2 (opr.) = 4.5~5.5 V 1 2001-08-27 BLOCK DIAGRAM PIN FUNCTION PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL VOUT VCC2 RSC La- La+ Lb- Lb+ Lc- Lc+ VCC1 GND Hc- Hc+ Hb- Hb+ Ha- Ha+ F/R CR C+ FUNCTIONAL DESCRIPTION PWM Output terminal Power supply input terminal Output current detection terminal a- phase lower drive output terminal a- phase upper drive output terminal b- phase lower drive output terminal b- phase upper drive output terminal c- phase lower drive output terminal c- phase upper drive output terminal Drive power supply input terminal GND terminal c- phase Hall amp negative input terminal 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 Normal rotation / reverse rotation switch terminal Capacitor connection terminal for reference oscillation parator reference voltage input terminal 2 2001-08-27 FUNCTION a) Forward rotation mode (Pin (18) open or 2.5 V Min.) 3 2001-08-27 b) Reverse rotation mode (Pin (18) GND or 0.4 V Max.) 4 2001-08-27 APPLICATION OF TA7247AP (1) Design method of switching regulator oscillation circuit (PWM generating circuit) The PWM wave generating circuit that controls the switching regulator output switching transistors is shown in Fig.2. The circuit consists of a triangular waveform generating circuit that generates a parison signal and a parator that pares the parison signal from the triangular waveform generating circuit with...