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Sine-Wave PWM Drive Controllers that Allow Low Noise/High Efficiency Drive for Three-Phase Brushless DC Motors
Toshiba Electronic Devices & Storage Corporation ("Toshiba") has launched the sine wave PWM drive controllers "TC78B043FNG" and "TC78B043FTG," for three-phase brushless DC motors, which can control both SPM[1] and IPM[2] motors with low noise and high efficiency.
In recent years, there has been an increasing trend in three-phase brushless DC motors used in home appliances and industrial equipment, such as air conditioners and air purifiers to adopt IPM motors instead of SPM motors, with the aim of achieving low cost, high output, and high torque.
However, since IPM motors are prone to generating noise, there is a growing demand for motor controllers that enable low noise and high efficiency operation.
The new products enable low noise motor drive through high-resolution sine-wave drive and sine-wave startup control.
In addition, they have built-in NVM[3], and by writing settings to the NVM using SPI[4] communication, various parameters can be adjusted according to the characteristics and usage of the motor. This allows highly efficiency motor control through parameter adjustment such as lead angle control.
Additionally, the NVM built into the TC78B043FNG has initial settings pre-written for typical motors used in applications such as air conditioners and air cleaners, allowing motor operation without writing via SPI communication. Moreover, TC78B043FNG is equipped with various motor control setting terminals[5] (FGC, LATYPE, LAOFS, and LA,) and by adjusting the voltage setting of these terminals, some parameters such as lead angle control can also be modified[6].
TC78B043FNG adopts the widely used HTSSOP28 package in the industry, making it easy to mount on the board due to its lead package. On the other hand, TC78B043FTG adopts a small WQFN20 package, enabling miniaturization of the circuit board and making it suitable for mounting in limited spaces.
Toshiba will continue to expand our lineup of controllers for three-phase brushless DC motors and help advance home appliances and industrial equipment in terms of high performance and energy efficiency, aiming to realize a more comfortable and sustainable society.
Notes:
[1] Surface Permanent Magnet (SPM) Motor: Motor with a permanent magnet attached to the surface of the rotor.
[2] Interior Permanent Magnet (IPM) Motor: Motor with a permanent magnet embedded inside the rotor.
[3] Non-volatile memory (NVM)
[4] Serial Peripheral Interface: Synchronous serial communication. A protocol for synchronously sending and receiving data.
FGC terminal: Input for setting rotation pulse/sine-wave reset method
LATYPE terminal: Input for setting lead angle control type/with or without stop sequence
LAOFS terminal: Input for setting lead angle value/SPD value offset
LA terminal: Input for setting maximum lead angle value/fixed lead angle value
[6] TC78B043FNG allows more detailed readjustment of motor control parameters through NVM writing via SPI communication than is possible using the various control setting terminals.
特点
- Low-noise motor operation through high-resolution sine-wave drive and sine-wave startup control
- Various settings according to motor characteristics and usage can be configured with NVM and SPI communication.
- High-efficiency motor control through parameter adjustments such as lead angle control
应用
Various fans
- Consumer equipment (air conditioners, air cleaners, water heaters, ventilation fans, fans, etc.)
- Industrial equipment (refrigerated showcases, etc.)
Main Specifications
| Part number | TC78B043FNG | TC78B043FTG | |||||
|---|---|---|---|---|---|---|---|
| Supported motors | Three-phase brushless motor | ||||||
| Absolute maximum ratings |
Power supply voltage MVCC (V) | 25 | |||||
| Output voltage MIOUT (mA) | 2 | ||||||
| Operating temperature Topr (°C) | -40 to 115 | ||||||
| Operating ranges |
Power supply voltage VCC (V) | 6 to 23 | |||||
| Drive method | High-resolution sine-wave drive[7] | ||||||
| Startup method | Sine-wave drive (forced commutation)[7] | ||||||
| Input method | Selectable analog voltage input/PWM Duty input/SPI speed control input | ||||||
| Other features | Supports various settings with NVM and SPI communication | ||||||
| Automatic lead angle control/fixed lead angle control | |||||||
| Selectable number of pulses for rotation pulse signal output | |||||||
| Hall element input/Hall IC input available | |||||||
| Selectable stop sequence | |||||||
| Forward/reverse switchable | |||||||
| External terminal parameter adjustment | Available | - | |||||
| Motor control initial settings | Yes | No | |||||
| Fault detection functions | Thermal shutdown, under voltage lockout, current limiter, over current detection, lock protection | ||||||
| Package | Name | P-HTSSOP28-0510-0.65-001 | P-WQFN20-0303-0.50-002 | ||||
| Size (mm) | Typ. | 6.4×9.7 | 3.0×3.0 | ||||
| Sample check & availability |  |
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Note:
[7] It allows settings such as a square wave drive via SPI communication.
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