TB6575FNG TB6575FNG functional description The TB6575FNG provides sensorless commutation and PWM current control for 3-phase full-wave BLDC motors. 1. Power supply voltage Power supply voltage usage range Characteristic Symbol Operating voltage range Unit Power supply for control block V 4.5 to 5.5 V DD 2. Control inputs (LA, CW/CCW, SEL LAP, Fmax, Fst, OS, Vsp) 1) Input method When V is switched off, the LA, CW/CCW, SEL LAP, Fmax, Fst, OS, and V input signals should be open or low, DD SP until V has settled. DD 3. Oscillation circuit 1) Operating oscillation range Characteristic Symbol Operating voltage range Unit Oscillation frequency fosc 2 8 MHz 2) Recommended oscillator Ceramic Oscillator4.19MHz FCR4.19MC5 (TDK Corporation ) CSTLS4M19G56-B0 (Murata manufacturing Co. Ltd) 3) Connection Place the oscillators GND as close as possible to the ICs S-GND pin. 1 2008-03-25 TB6575FNG 4. Application circuit Example for ~30Vmax MCU 5 V Duty V M 1 2 2 7 Speed Starting 6 bit AD V OS FG OUT DD Command V Time Convertor SP (Liner Voltage) OUT UP PWM 5 1 Setting Control OUT VP M SC 1 2 OUT WP START 1 8 DC excitation PMW OUT UN IP 1 control circuit generator 9 V OUT VN DD Startup 1 F ST 2 commutation OUT WN 2 frequency 1 setting F Maximum MAX Timing commutation 5 frequency Controller setting OC Over V 2 DD LA Lead angle current 1 setting 1 CW CCW protection 6 SEL LAP 2 TA75393P Position Clock WAVE 2 recognition geberator X X GND Tout Tin 1 1 1 Crystal Oscillator 4 MHz 1) Capacitors for power supply and GND, and between VM and GND as near the IC as possible. Connect capacitors between V DD < Recommended values> Characteristic Recommended value Remarks V GND 10F 33F Electrolytic capacitor DD VMGND 0.001 0.22F Ceramic capacitor 2) Startup setting Please decide the value from the results of your evaluation because it depends on the motors. <Conditions of Toshibas Evaluation> Characteristic Value Remarks SCC1 0.47uF Ceramic capacitor Resistor STARTIPR1 220k 1uF Ceramic capacitor IPC2 Our fan motor for evaluation operates under these conditions. 2 2008-03-25 0.47 F 220 k 1 F 10 k 100 k 100 k 22 pF 1 100 k 3