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TB6588FG Dataheets PDF



Part Number TB6588FG
Manufacturers Toshiba
Logo Toshiba
Description 3-Phase Full-Wave PWM Driver
Datasheet TB6588FG DatasheetTB6588FG Datasheet (PDF)

TB6588FG TOSHIBA BiCD Integrated Circuit Silicon Monolithic TB6588FG 3-Phase Full-Wave PWM Driver for Sensorless DC Motors The TB6588FG is a three-phase full-wave PWM driver for sensorless brushless DC (BLDC) motors. It controls rotation speed by changing the PWM duty cycle, based on the voltage of an analog control input. Features • • • • • • • • • • • • • Sensorless drive in three-phase full-wave mode PWM chopper control Controls the PWM duty cycle, based on an analog input (7-bit ADC) Outpu.

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TB6588FG TOSHIBA BiCD Integrated Circuit Silicon Monolithic TB6588FG 3-Phase Full-Wave PWM Driver for Sensorless DC Motors The TB6588FG is a three-phase full-wave PWM driver for sensorless brushless DC (BLDC) motors. It controls rotation speed by changing the PWM duty cycle, based on the voltage of an analog control input. Features • • • • • • • • • • • • • Sensorless drive in three-phase full-wave mode PWM chopper control Controls the PWM duty cycle, based on an analog input (7-bit ADC) Output current: IOUT = 1.5 A typ. (2.5 A max) Power supply: VM = 7 to 42 V (50 V max) Overcurrent protection Forward and reverse rotation Lead angle control (0°, 7.5°, 15°, 30°) Overlapping commutation Rotation speed detecting signal DC excitation mode to improve starting characteristics Adjustable DC excitation time and forced commutation time for a startup operation Forced commutation frequency control: fosc/(6 × 216), fosc/(6 × 217), fosc/(6 × 218), fosc/(6 × 219) Weight: 0.79 g (typ.) 1 2008-4-25 Free Datasheet http://www.datasheet4u.com/ TB6588FG Pin Assignment VM1 U V CW_CCW EN N.C. FMAX SEL_LAP IR1 1 2 3 4 5 6 7 8 9 Fin 36 35 34 33 32 31 30 29 28 Fin 27 26 25 24 23 22 21 20 19 VM3 N.C. LA1 LA2 FPWM FST1 FST2 FG_OUT IR3 IR2 N.C. W PGND OC WAVEP WAVEM VM2 SGND1 10 11 12 13 14 15 16 17 18 OSC_R OSC_C IP START SC VSP VREF WAVE SGND2 2 2008-4-25 Free Datasheet http://www.datasheet4u.com/ TB6588FG Pin Description Pin No. 1 2 3 4 Symbol VM1 U V CW_CCW I/O ⎯ O O I Description Motor power supply pin (VM = 7 to 42 V). VM1, VM2 and VM3 are connected together inside the IC. U-phase output V-phase output Rotation direction select input (This pin has a pull-up resistor.) H or open: Clockwise (U → V → W) L: Counterclockwise (U → W → V) Protection enable input (This pin has a pull-up resistor.) This input determines whether or not to enable the protection functionality when either of the following conditions is true: a) the maximum commutation frequency is exceeded. b) the rotation speed falls below the forced commutation frequency. H or open: Protection functionality enabled L: Protection functionality disabled No-connect Selects the upper limit of the maximum commutation frequency. (This pin has a pull-up resistor.) Maximum commutation frequency (fMAX): cycles per second equivalent to an electrical degree 11 H or open: fMAX ∼ Example: fMAX ∼ − fosc/3 × 212 − 0.8 kHz @ fosc = 5 MHz L: fMAX ∼ Example: fMAX ∼ − fosc/3 × 2 − 0.4 kHz @ fosc = 5 MHz Overlapping commutation select pin (This pin has a pull-up resistor.) H or open: 120°commutation L: Overlapping commutation Connection pins for an output shunt resistor (IR1 and IR2 are connected together inside the IC. However, IR3 is not connected to IR1 or IR2 inside the IC; these three pins must be connected together externally.) No connect W-phase output Power ground pin Overcurrent detection input (This pin has a pull-down resistor.) All PWM output signals are stopped when OC ≥ 0.5 V (typ). Positive (+) position signal input Negative (−) position signal input Motor power supply pin (VM = 7 to 42 V). VM1, VM2 and VM3 are connected together inside the IC. Signal ground pin (SGND1 and SGND2 are connected together inside the IC.) Position signal output Provides a majority of the voltages of the three phase signals. Reference voltage output; VREF = 5 V (typ.) Duty cycle/motor speed control input (This pin has a pull-down resistor.) Duty = 0% 0 ≤ VSP < VAD (L): VAD (L) ≤ VSP ≤ VAD (H): Sets the PWM duty cycle, based on the analog input. VAD (H) < VSP ≤ VREF: ≈100% duty cycle (127/128) Connection pin for a capacitor to set the startup commutation time and the ramp-up time for the on state. DC excitation time setting pins When VSP ≥ 1 V (typ.), START is driven low, starting DC excitation. When the IP voltage has reached VREF/2, the TB6588FG switches to forced commutation mode. OSC_C: Connection pins for the oscillator capacitor OSC_R: Connection pins for the oscillator resistor Example: Internal oscillating frequency (fosc) ∼ − 5.25 MHz (typ.) when OSC_C = 100 pF and OSC_R = 20 kΩ Connection pin for an output shunt resistor (IR1 and IR2 are connected together inside the IC. However, IR3 is not connected to IR1 or IR2 inside the IC; these three pins must be connected together externally.) 5 EN I 6 N.C. ⎯ 7 FMAX I 8 9 10 11 12 13 14 15 16 17 18 19 20 21 SEL_LAP IR1 I O IR2 N.C. W PGND OC WAVEP WAVEM VM2 SGND1 SGND2 WAVE VREF O O ⎯ O ⎯ I I I ⎯ ⎯ 22 VSP I 23 24 25 26 27 SC START IP OSC_C I O I ⎯ OSC_R 28 IR3 O 3 2008-4-25 Free Datasheet http://www.datasheet4u.com/ TB6588FG Pin No. Symbol I/O Description Rotation speed output pin (open-drain) This output is held low at startup and when an abnormality is detected. In sensorless mode, pulses are generated at 3 ppr according to the back-EMF. Note: 3 ppr = 3 pulses per electrical degree (With a four-pole motor, six pulses are generated per revolution.) Forced commutation frequency select inputs (These pins have .


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