Datasheet TB9062FNG (Toshiba) - 6
| Fabricante | Toshiba |
| Descripción | Pre-driver for automobile |
| Páginas / Página | 30 / 6 — 7. Function. Summery. Sensorless operation. 7.2.1. Start up sequence … |
| Formato / tamaño de archivo | PDF / 871 Kb |
| Idioma del documento | Inglés |
7. Function. Summery. Sensorless operation. 7.2.1. Start up sequence setting and sensorless operation
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TB9062FNG
7. Function Summery
TB9062FNG controls 3 phase BLDC motor by PWM duty based on input PWM signal. The input PWM signal requirement is as below. 【Input PWM signal】 ・Frequency：5Hz to 1.2kHz ・PWM duty：0% to 100% ・Voltage: 0V to VBAT The TB9062FNG generates 17kHz PWM output signal (@ 4MHz OSC frequency) based on input PWM signal by its on-chip logic. 【Output PWM signal】 ・Frequency：17kHz (at 4MHz Internal OSC) ・PWM duty：Compensated duty of input PWM (ref. 7.4.1) ・Voltage: 0V to VBAT TB9062FNG may not operate properly if the input PWM signal is out of this range.
Sensorless operation
When TB9062FNG detect 2nd rising edge of input PWM signal, internal counter is started to count the input PWM frequency and duty. Input PWM duty is compensated based on (7.3.3 input compensation circuit). When those frequency and PWM duty with the compensation is within spec., sensorless start up sequence is initiated. Sensorless start up sequence is firstly performed by DC excitation to set fixed position of the motor during the setting time period and after that setting time up, forced commutation is started by setting frequency. During forced commutation, if the motor position is detected by zero crossing, TB9062FNG sensorless operation shall commence.
7.2.1. Start up sequence setting and sensorless operation
The sensorless operation mode of TB9062FNG and start up sequence setting is as follows.
Fig. 7.2.1 Operation mode and start up setting
Operation mode 120 degrees Square Operation CW/CCW One direction (CW) PWM Upper PWM operation 7.5 ° Pin” SW_LA”= “L” Lead angle 15 ° Pin “SW_LA”= “H” Start up sequence 600 rpm Pin “SEL_BIT0” = “L”, pin “SEL_BIT1”= “L” setting Forced commutation 2400 rpm Pin “SEL_BIT0” = “L”, pin “SEL_BIT1”= “H” frequency 1200 rpm Pin “SEL_BIT0” = “H”, pin “SEL_BIT1”= “L” (electrical angle) 300 rpm Pin “SEL_BIT0” = “H”. pin “SEL_BIT1”= “H” （Note）Each pin “SW_LA”, “SEL_BIT0”, “SEL_BIT1” has built-in pull down resistor. Thus, in the case of each pin open, the setting is the same as the above setting “L”. Regardless, connection to “L” is recommended. © 2019 6 / 30 Toshiba Electronic Devices & Storage Corporation 2019-08-05
7. Function Summery
TB9062FNG controls 3 phase BLDC motor by PWM duty based on input PWM signal. The input PWM signal requirement is as below. 【Input PWM signal】 ・Frequency：5Hz to 1.2kHz ・PWM duty：0% to 100% ・Voltage: 0V to VBAT The TB9062FNG generates 17kHz PWM output signal (@ 4MHz OSC frequency) based on input PWM signal by its on-chip logic. 【Output PWM signal】 ・Frequency：17kHz (at 4MHz Internal OSC) ・PWM duty：Compensated duty of input PWM (ref. 7.4.1) ・Voltage: 0V to VBAT TB9062FNG may not operate properly if the input PWM signal is out of this range.
Sensorless operation
When TB9062FNG detect 2nd rising edge of input PWM signal, internal counter is started to count the input PWM frequency and duty. Input PWM duty is compensated based on (7.3.3 input compensation circuit). When those frequency and PWM duty with the compensation is within spec., sensorless start up sequence is initiated. Sensorless start up sequence is firstly performed by DC excitation to set fixed position of the motor during the setting time period and after that setting time up, forced commutation is started by setting frequency. During forced commutation, if the motor position is detected by zero crossing, TB9062FNG sensorless operation shall commence.
7.2.1. Start up sequence setting and sensorless operation
The sensorless operation mode of TB9062FNG and start up sequence setting is as follows.
Fig. 7.2.1 Operation mode and start up setting
Operation mode 120 degrees Square Operation CW/CCW One direction (CW) PWM Upper PWM operation 7.5 ° Pin” SW_LA”= “L” Lead angle 15 ° Pin “SW_LA”= “H” Start up sequence 600 rpm Pin “SEL_BIT0” = “L”, pin “SEL_BIT1”= “L” setting Forced commutation 2400 rpm Pin “SEL_BIT0” = “L”, pin “SEL_BIT1”= “H” frequency 1200 rpm Pin “SEL_BIT0” = “H”, pin “SEL_BIT1”= “L” (electrical angle) 300 rpm Pin “SEL_BIT0” = “H”. pin “SEL_BIT1”= “H” （Note）Each pin “SW_LA”, “SEL_BIT0”, “SEL_BIT1” has built-in pull down resistor. Thus, in the case of each pin open, the setting is the same as the above setting “L”. Regardless, connection to “L” is recommended. © 2019 6 / 30 Toshiba Electronic Devices & Storage Corporation 2019-08-05