Toshiba introduced brushless motor pre-driver integrated circuits for automotive applications

Toshiba Corporation has announced the TB9080FG, a three-phase brushless motor pre-driver integrated circuit for general automotive applications, that allows the motor to operate with low noise and high efficiency through sine wave drive and advance angle control1. The product is scheduled to put into mass production in September this year.

For vehicles equipped with an idling reduction system, the engine noise of the vehicle disappears when the system is activated, while the noise of the car air conditioner is more audible. Despite the urgent need in the market for a method of reducing air conditioning noise, mechanical solutions such as optimizing the main source of noise - the blade shape of the blower fan and the noise reduction material in air ducts fail to achieve low noise goals.

The TB9080FG replaces 120 degree square wave control with sine wave control, which electronically reduces the noise of the blower fan motor. Optimized advance angle control also helps improve motor operation.

Product main features

1. Sine wave control to reduce noise

Sine wave control with third harmonic helps the motor run more quietly.

2. Digital filter to prevent over-the-counter motor 2

The digital filter circuit controls the external PWM3 signal, ensuring the motor starts slowly and avoids overshooting.

3. Built-in 16 kinds of rotation of the datasheet

The built-in datasheet supports the use of motors of all poles (from 4 poles to 12 poles).

4. Optimized advance angle control to achieve high efficiency

The motor current is measurable and the advance angle is automatically controlled in increments of 1 degree to help increase the motor's rotational efficiency.

5. Motor speed feedback control can increase speed accuracy

The motor speed is controlled by comparing the target value with the signal from the external Hall element sensor 4.

The main specifications

Product Type: TB9080FG

Sample price: 400 yen (tax included)

Production plan: September 2013

Production volume: 3 million / year

Channels: 6 channels (boost DCDC high: 3 channels, low: 3 channels)

Standby current: 50μA (sleep mode, Ta = 25 ° C)

Operating voltage range: +7, -18V

Operating temperature range: -40, -125 ° C

Speed ​​Input Signal: The external PWM ratio or DC input voltage value is used as the target speed and the integrated circuit compares the speed (Hall element signal) accordingly and controls the motor speed.

Drive Control: Drive the sine wave by generating the third harmonic

Detection circuit: overcurrent detection, overheating detection, overvoltage detection, VCC low voltage detection, internal and external temperature detection, external temperature limit circuit and motor lock detection

Diagnostic circuit: Uses the 10Hz signal and the PWM duty ratio previously determined according to various abnormal modes to output the error message.

Package: LQFP64 (12mmx12mmx1.4mm)