TB6588FG中文资料.doc

TOSHIBA Bi-CMOS Integrated Circuit Silicon Monolithic东芝Bi-CMOS集成电路硅单片TB6588FGPWM Sensorless Driver for 3-Phase Full-Wave BLDC Motors 无刷无霍尔电机三相全波驱动器The TB6588FG provides sensorless commutation and PWM current control for 3-phase full-wave BLDC motors. It controls rotation speed by changing a PWM duty cycle by analog voltage. （tb6588fg可实现无位置传感器换相及PWM三相全波直流无刷电机的电流控制。它通过模拟电压改变脉宽调制占空比来控制旋转速度。） Features 功能3-phase full-wave sensorless drive （三相全波无传感器驱动） PWM chopper drive （PWM斩波驱动）PWM duty cycle control by analog input (7-bit AD converter) （通过模拟量输入控制 PWM占空比（7位AD转换器）Output current: Iout 2.5 A (max), 1.5 A (typ.) （输出电流：电流输出2.5（最大），1.5（典型）Overcurrent protection 过电流保护Forward/reverse rotation 正向/反向旋转Lead angle control (00, 7.50, 150 and 300) 超前角控制（00 ，7.50 , 150,和300）Overlap commutation 重叠换相Rotation speed detecting signal 转速检测信号DC excitation mode to improve startup characteristic 直流励磁方式改善启动特性Adjustable DC excitation time and forced commutation time for startup operation可调直流励磁时间和启动操作的强制换向时间Forced commutation frequency control capability (fosc/(6x216 ), fosc/(6x217 ), fosc /(6x218), fosc /(6x219 )强制换向频率控制功能(fosc/(6x216 ), fosc/(6x217 ), fosc /(6x218), fosc /(6x219 ) Pin Description引脚描述Pin No引脚号Symbol 符号I/O进/出Description描述SGNDSignal ground pin 信号地引脚SC|Connection pin for a capacitor to set a startup commutation time and ramp-up period during duty-cycle operation用于占空比操作期间设置启动换向时间和斜坡上升时间的电容连接引脚FPWM|PWM frequency select input (This pin has a pull-down resistor.) PWMPWM频率选择输入引脚（有下拉电阻）High : fPWM=fosc /128 高电平 ：fPWM=fosc /128Low,open : fPWM= fosc /256 低电平或开路：fPWM= fosc /256FMAX|Set an upper limit of the maximum commutation frequency. (This pin has a pull-up resistor.) 设置最大换相频率上限（有上拉电阻）High, Open : Maximum commutation frequency fMAX=fOsc/(6x28 ) Low : Maximum commutation frequency fMAX=fOsc/(6x29 )VSP|Duty cycle/motor speed control input (This pin has a pull-up resistor.)占空比/电机速度控制输入引脚（有下拉电阻）0VSPVAD(L): Output off （输入电压小于输入下限，输出关闭）VAD(L)VSPVAD(H): Set the PWM duty cycle according to the analog input. （输入电压大于等于下限，小于等于上限时PWM占空比随输入电压变化） VAD(H)VSP1 V (typ.), the START pin goes low to start DC excitation. After the IP pin reaches VREF/2, the TB6588FG moves from DC excitation to forced commutation mode. 当VSP1 V（典型值），START引脚变为低电平开始直流励磁。当IP引脚电压达到Vref / 2后从直流励磁转换为强迫换相模式。IP|OSC_CConnection pin for an oscillator capacitor振荡电容连接引脚OSC_RConnection pin for an oscillator resistor振荡电阻连接引脚LA1|Lead angle control input (These pins have pull-up resistors.)提前角控制脚（有上拉）LA2: LA1=High, Open：High, Open=Lead angle of 300都为高或悬空：提前角为300LA2: LA1=High, Open : Low =Lead angle of 150高或悬空低 ：提前角为150LA2: LA1=Low : High, Open =Lead angle of 7.50低高或悬空：提前角为7.50LA2: LA1=Low : Low =Lead angle of 00 都为低 ：提前角为00LA2|UOPhase-U output 相线U输出VOPhase-V output 相线V输出WOPhase-W output 相线W输出IROConnection pin for an output shunt resistor分流电阻连接引脚OC|Overcurrent detection input (This pin has a pull-up resistor.)过流检测输入（有上拉）The all PWM output signals are stopped when OC0.5 (V).输入0.5V时，输出全关闭WAVEOPosition signal output ，Generate a majority logic signal of 3-phase terminal voltage. 位置信号输出，产生三相终端电压的多数逻辑信号SEL_LAP|Overlap commutation select pin (This pin has a pull-up resistor.)重叠换向选择（上拉）High, Open : 120!a commutation 为高或开路：120度换相Low : Overlap commutation 为低 ：重叠换相VREF5-V power supply pin 5V基准电压引脚WAVEP|Position signal input (+) 位置信号输入（+）WAVEM|Position signal input (-) 位置信号输入（-）FST1|Forced commutation frequency select pin (These pins have pull-down resistors.)强制换相频率选择（内有下拉电阻）FST2: FST1=High : High=Forced commutation frequency fST=f osc /(6x216 )FST2: FST1=High : Low, Open=Forced commutation frequency fST=f osc /(6x217 )FST2: FST1=Low, Open : High=Forced commutation frequency fST=f osc /(6x218 )FST2: FST1=Low, Open:Low,Open=Forced commutation frequency fST=f osc /(6x219 )FST2|VMMotor power supply pin 电机驱动电源输入引脚PGNDPower ground pin 电源地引脚EN|Fault protection operation select input (This pin has a pull-up resistor.)故障保护功能选择引脚（内有上拉）High, Open : Protection operation is ON. （为高或开路：保护功能开启）Low : Protection operation is OFF. （为低 ：保护功能关闭）Functional Description 功能描述 1. Sensorless drive 无传感器驱动 Upon receiving an analog voltage signal input for startup, the rotor is aligned to a known position in DC excitation mode, and then the rotation is started in forced commutation mode by applying a PWM signal to the motor. As the rotor moves, the back-EMF is acquired in each phase of the coil. 在接收到启动电压信号后，转子在直流励磁模式下对准一个已知位置，然后通过施加一个PWM信号，在强制换向模式下旋转电机。在转子的转动的同时获取在每相线圈的反电动势。When a signal indicating the polarity of each phase terminal voltages including back-EMF is applied to the position signal input, automatic switching occurs from the forced commutation PWM signal to the normal commutation PWM signal based on the position signal input (detected back-EMF) to drive a BLDC motor in sensorless mode.当一个信号，表明每个相终端电压的极性，包括反电动势被施加到位置信号输入，自动切换发生从强制换向的脉宽调制信号到正常基于位置信号输入整流PWM信号（检测反电动势）来驱动无刷直流电机在无传感器模式。2. Startup operation 启动运行At startup, there is no back-EMF due to the stationary motor, and the motor position cannot be detected in sensorless mode. To avoid this, the TB6588FG rotor is first aligned to a known position in DC excitation mode for a certain period of time, and then the motor is started in forced commutation mode. Each period of DC excitation and forced commutation drives is set with an external capacitor. These time settings vary depending on the motor type and motor loading, so that they should be adjusted experimentally.在启动时，没有反电动势，在无传感器模式下电机的位置不能检测到。为了避免这种情况，在一定的时间内利用DC激励转子对齐一个已知的位置，然后电机启动，强制换向。直流励磁时间和强制换向时间都由一个外部电容设定。根据电机的类型和电机的负载不同设定时间也不同，通过进行实验进行调整。The rotor is aligned to a certain position specified in DC excitation mode for the period of (a), during which the IP pin voltage decreases from VREF to VREF/2 level. The time constant for the period is determined by C and R . After that, operation mode is switched to forced commutation mode (b) as shown above. The duty cycles for DC excitation and forced commutation modes are determined according to the SC pin voltage. When the rotational frequency exceeds the forced commutation frequency specified with the status of the FST pins, the operation mode is switched to the sensorless mode. The duty cycle for sensorless mode is determined by the VSP value.在IP引脚电压从VREF降低至VREF / 2期间，在阶段（a）转子在直流励磁模式下对准某一指定的位置。这个相关时间常数是由C和R确定的。之后，操作模式切换到强制换向模式（b）如上所示。直流励磁和强制换向模式的占空比根据引脚SC的电压确定。当转动频率超过FST引脚状态指定的强制换向频率后，运行模式切换到无传感器运行模式。无传感器模式的PWM占空比是由VSP电压值设定。3. Operating delay under rotational speed control 转速控制模式下的操作延时 Rotation speed of the motor, including rotation startup and stop, is controled by applying the speed command voltage to the VSP pin. However, the operation of the device is actually determined by applied voltage to the SC pin. The voltage on the SC pin is the charging voltage of a capacitor C, which is determined by the charging/discharging time of C. This induces an operating delay. When the applied voltage on the VSP pin is varied from 1 to 4V, the operating delay occurs as shown below.电机的转速，包括启动和停止，通过应用速度指令电压的VSP引脚控制。然而，实际上的操作是由SC引脚的电压确定的。SC引脚的电压是电容C电压，它受C充电/放电时间影响导致反应延迟。当在VSP引脚施加的电压从14V变化时，反应延迟如下图所示。Charging time of C1 (when accelerating): TUP (typ.)=C1x(VSPU- VSPL)/3.8uA (s) c1的充电时间 Discharging time of C1 (when decelerating): TDOWN (typ.)=C1x(VSPU-VSPL)/36uA (s) 放电时间Note: When the motor is stopped (VSP1 V), the SC pin capacitor C is instantly discharged. (Discharging time of C1 is the time C1 is discharged through 2 k (typ) to GND) 注意：当电机停止时(VSP1 V),SC引脚电容C会立即放电（放电时间是由一个2K电阻对地）4. Forced commutation frequency 强制换相频率The forced commutation frequency at startup is set as follows. 启动时强制换相频率如下设置The optimal frequency varies depending on the motor type and motor loading, so that they must be adjusted experimentally. 最佳频率取决于电机类型和负载，因此，必须进行实验调整。The forced commutation frequency is determined by the value of external capacitor and resistor, and also the logic level of FST1 and FST2 pins (These pins have pull-down resistors). 强制换相频率由外部振荡电阻及电容确定，同样也与FST1和FST2引脚的设置有关（这俩引脚已下拉）FST2: FST1=High : High=Forced commutation frequency fST=f osc /(6x216 )FST2: FST1=High : Low, Open=Forced commutation frequency fST=f osc /(6x217 )FST2: FST1=Low, Open : High=Forced commutation frequency fST=f osc /(6x218 )FST2: FST1=Low, Open:Low,Open=Forced commutation frequency fST=f osc /(6x219 )5.PWM frequency PWM的频率The PWM frequency is determined by the value of external capacitor and resistor, and the logic level of the FPWM pin (This pin has a pull-down resistor). PWM的频率取决于外部振荡电容和电阻，以及FPWM引脚的设置 （该引脚已下拉）High : fPWM=fosc /128 Low,open : fPWM= fosc /256The PWM frequency must be sufficiently high, compared to the electrical frequency of the motor. It also must be within the allowable range of switching performance of the driver circuit.PWM的频率相对于电机的频率必须足够高，当然，也必须在驱动电路允许的范围之内6. Speed control pin (VSP) 速度控制引脚An analog voltage applied to the VSP pin is converted by a 7-bit AD converter to control the duty cycle of the PWM.这个模拟电压通过一个7位的AD转换器去控制PWM的占空比0VSPVAD(L): Output off （输入电压小于输入下限，输出关闭）VAD(L)VSPVAD(H): Set the PWM duty cycle according to the analog input. （输入电压大于等于下限，小于等于上限时PWM占空比随输入电压变化） VAD(H)VSP VREF: Duty cycle 100% (127/128)7. Fault protection operation 故障保护设置The logic level of the EN pin determines whether to activate the protection operation. (This pin has a pull-up resistor.) 引脚EN的逻辑电平决定是否启动故障保护（该引脚已上拉） High, Open : Protection operation On 高电平或悬空：保护功能启动 Low : Protection operation Off 低电平 ：保护功能关闭When a signal indicating the following faults is detected at the WAVEP,WAVEM pin, the output transistors are disabled by determining that the motor is in the abnormal state. About one second later, the motor is restarted. This operation is repeated as long as a fault is detected. The maximum commutation frequency is exceeded. The rotation speed falls below the forced commutation frequency.当检测到wavep，wavem引脚出现故障信号，则认为电机处于异常，此时将关闭功率输出晶体管。大约一秒钟后，电机重新启动。只要检测到其中任意一个故障存在，就重复启动此过程。最大换相频率超出。旋转速度低于强制换向频率。8. Motor position detection error 电机位置检测错误The position detection is synchronized with the PWM signal generated in the IC. Thus, a position detection error related to the PWM signal frequency may occur. Caution is required when the TB6588FG is applied to a high-speed motor. The detection is performed on the falling edge of the PWM signal. An error is recognized when the terminal voltage exceeds the reference voltage. 位置检测与脉宽调制信号在IC内部是同步的，所以，与PWM信号相关的位置检测错误可能会发生。当应用于高速电机需要注意。检测是在PWM信号的下降沿进行的，当端口电压超过参考电压后就会产生一个错误。Detection lag1/fp fp : PWM frequency=fosc/256, fosc/128 fosc : CR (capacitor-resistor) frequency 9. Lead angle control 超前角控制The motor runs with a lead angle of 00 in forced commtation mode at startup. After switching to normal commutation mode, the lead angle is automatically changed to the value set by the LA1 and LA2 pins.在电机启动时的强制换相阶段，超前角为0，随后切换到正常换相模式后，其大小由LA1和 LA2决定10. Overlap commutation control 重叠换相控制When SEL_LAP High, the TB6588FG is configured to allow for 120commutation. When SEL_LAP Low, it is configured to allow for overlap commutation mode. In overlap commutation mode, there occurs an overlap period due to the lengthened commutation time from the zero cross point to the 120 commutation timing upon PWM signal switching as shown in the shaded areas. These periods vary depending on the lead angle setting.当SEL_LAP脚为高电平时，TB6588FG配置成120换相模式。当SEL_LAP脚为低电平时，其被配置成重叠换相模式。在重叠换相模式中，出现了一个重叠的周期，由于从零交叉点到120度换向时间的延长，使PWM在阴影区域进行切换。其周期大小取决于SEL_LAP脚的设置。Absolute Maximum Ratings (Ta=25C) 绝对极限参数Characteristics特性Symbol符号Rating极限Unit单位Power supply voltage电源电压VM50VInput voltage 输入电压Vin-0.3 to VREF+0.3VTurn-on signal output current启动电流Iout2.5(Note1)APower dissipation 耗散功率PD1.4(Note2)W3.2(Note3)Operating temperature 工作温度Topr-30 to 1050CStorage temperature 存储温度Tstg-55 to 1500CNote 1: Output current maybe controlled according to the ambient temperature or a heatsink. The maximum junction temperature should not exceed Tjmax=150 Note 2: Measured for the IC only. (Ta=25) Note 3: Measured when mounted on the board. (100X200X1.6 mm, Cu: 50%) 注1：输出电流与环境温度、散热情况有关。最高结温度不应超过TJMAX = 150注2：仅集成电路下测量。（TA = 25）注3：测量时安装在散热板上。（100x200x1.6毫米，铜：50%）Recommended Operating Conditions(Ta=-30 to 105 oC) 推荐工作条件Characteristics特性Symbol符号Min最小Typ典型Max最大Uint单位Power supply voltage电源电压VM102442VInput voltage 输入电压Vin-0.3-VDD+0.3VOscillation frequency振荡频率Fosc4.05.06.0MHzPackage Power Dissipation 封装的功率耗散(1) Rth(j-a) only (96OC/W) 仅芯片自身(96OC/W)(2) When mounted on the board (114mmX75mmX1.6mm, Cu 20%: 65OC/W) 当安装在散热板上(114mmX75mmX1.6mm, Cu 20%: 65OC/W)(3) When mounted on the board (140mmX70 mmX1.6 mm, Cu 50%: 39OC/W)当安装在散热板上(140mmX70 mmX1.6 mm, Cu 50%: 39OC/W)Electrical Characteristics (Ta=25oC, VM=24 V)电气特性（环境25摄氏度，电源24V条件下）Characteristics特性Symbol符号Test Condition测试条件Min最小Typ典型Max最大Uint单位Static power supply current at VMIMVSP=0V,XTin=H静态电流-0.51mADynamic power supply current at VMIM(opr)VSP=2.5 V, XTin=5 MHz, Output Open动态电流-12mAInput current输入电流IIN-1（H）VIN=5V,OC,SEL_LAP,FMAX,EN,CW_CCW,LA1,LA2-01uAIIN-1（L）VIN=0V,-75-50-IIN-2（H）Vin=5 V, FST1, FST2, FPWM-5075IIN-2（L）Vin=0V, FST1, FST2, FPWM-10-IIN-3（H）Vin=5 V, VSP -90150IIN-3（L）Vin=0V, VSP -10-Input voltage输入电压VIN-1（H）SEL_LAP,CW_CCW,LA1,LA2,FMAX, FST1, FST2, EN, FPWM3.5-5VVIN-1（L）GND-1.5Input hysteresis voltageVHI