KA44171A-VB(T)

Product Description

KA44171A is Pre Driver IC for Single Phase Brushless Motor. DC or PWM signal can be applied for motor speed control input. It also has APRaS (Advance Phase and Rapid Soft switching) which optimizes high speed operation of the motor by reducing the noise and vibrations. It is a Pre Driver IC which means it will drive power transistors connected to the motor and not the phase windings of motor directly. It can also be called a gate driver which acts as an intermediary between controller and power MOSFETs. It is very versatile in the voltage ranges of the motor which can be connected to the IC as it can drive single phase motors at voltage level of 12V, 24V and 48V at a high efficiency of operation. It utilizes PWM soft switching function and motor current phase setting enables motor current direction to switch smoothly, achieve high efficiency and silent driving. Wide supply voltage range allows use of various external power MOSFET which can be selected according to motor intended to be used. The use of pre driver IC makes the control over BLDC motors even better as it gives the control in the hand of designer to use the external power MOSFET/transistors according to specified speed as per the demand of application.

Features

KA44171A is equipped with APRaS (Advanced Phase and Rapid Soft switching) to optimize high speed motor performance. With a wide input voltage range of 12V, 24V and 48V, this IC is most suitable for usage in data server, base station, home appliances, office automation and factory automation (for high speed fan motor < 100krpm) equipment.

• Supply voltage range: 5.0 V to 36 V
• Pre Driver for single phase Motor(Pch /Nch MOS FET driving)
• Phase shift function and Soft switching make high efficiency and silent driving.
• Some variable functions by A/D input ( 6ports 5bit) accept various applications.

           It has many selectable variable functions that can be controlled by A/D port. e.g. :Soft                         switching period, Phase shift, Minimum speed, Motor lock detection / release time, Soft start                 time, PWM output frequency.

• FG pulse or LD ( Motor lock detection ) output can be selected.  
• Various protection functions:

           Under Voltage Lock Out (UVLO),

           Thermal protection

           Current limiter

           Motor lock detection

• Small package: QFN 20L (3x3x0.8mm3, Lead Pitch 0.4mm)

Other features:

           QFN 20L

QFN (quad flat no lead) package is quite small in size and has leads at the edges making it easier to debug and use as well. QFN is one of the commonly used component package size used in portable electronics and its small size makes it perfect for applications where space constraint is very important.

          PWM and Linear DC

It has both PWM and Linear DC control options making it suitable for microcontroller based applications and manual control as well giving the user more flexibility in terms of speed control and product design.

          Under Voltage Lock Out (UVLO), Thermal protection GND short protection, and Over Current                Protection

The protections available in this motor controller make sure that the operations of the motor are always safe and there is no danger to the motor or the equipment.

          Soft Start available

The availability of Soft start in this pre driver will allow the customization of startup waveform to be customized according to requirement of motor to ensure highest efficiency is always achieved.

Basic Specification

Pin Out

Similar Products

If you need a gate driver IC for driving single phase BLDC motor then KA44171A is most suitable option from Nuvoton. It gives you the flexibility to connect external power MOSFETs to drive the motor at a desired speed and with greater control. But, if you need other single phase BLDC motor controller ICs then you can have a look at the table below and based on the motor type, its voltage and current ratings, select the most suitable product for the application.

Applications

Server, Cellular Base station, Factory automation, Home appliance

Application circuit

Note:

The application circuit is an example. The operation of the mass production set is not guaranteed. Sufficient evaluation and verification is required in the design of the mass production set. The Customer is fully responsible for the incorporation of the above illustrated application circuit in the design of the equipment.

Recommend circuit

Note:

The recommended circuit is an example. The operation of the mass production set is not guaranteed. Sufficient evaluation and verification is required in the design of the mass production set. Customer is fully responsible for the incorporation of the above illustrated application circuit in the production.

Reference Waveform

Condition: VCC = 12 V, PWMI = 100% duty , Cvcc = 10 μF