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Industry’s First EEPROM Programmable Three-Phase DC Brushless Motor Controller Chipset Well-Suited for Office Products

Free Software Program Adds to Ease of Design

DALLAS (April 27, 1998) -- Leveraging its mixed-signal design expertise, Texas Instruments (TI) introduces the first three-phase direct current (DC) brushless motor (BLM) controller chipset to offer EEPROM programmable capability. This is the first phase-locked-loop (PLL) motor control device to implement the PLL digitally utilizing a DSP filter algorithm. This chipset offers designers the flexibility to program pole/zero digital filter coefficients to optimize compensation of the system, and is well-suited in applications such as printers, copiers and scanners.

The new chipset for three-phase DC BLM is made up of a motor controller, designated the TPIC43T01, and a motor driver, designated the TPIC1310. The TPIC43T01 is a monolithic motor control integrated circuit designed to provide precision RPM (revolutions per minute) control to a three-phase DC BLM. The TPIC1310 is a monolithic gate-protected power DMOS array configured as a three-half-H-bridge. When combined, the TPIC43T01 controller and the TPIC1310 Power+ Array™ give the motor system designer the ability to optimize the current switching capability of the output stage through the employed pulse-width modulation techniques.

Additionally, TI provides a PC-based Windows® compatible software package allowing users to input the motor and system characteristics, optimizing the control loop response with continuous-time parameters, and the program selects the required digital filter coefficients. Once the PLL parameters are finalized, the software program outputs the resulting EEPROM settings to a Joint Electron Device Engineering Committee (JEDEC) compatible file to program the TPIC43T01 through a third party device programmer. This software package is available by request, at no charge.

"TI's software support for the TPIC43T01 is just as unique as the device. It provides designers with an easy-to-use, graphic-based tool to help them quickly design their motor systems using our new chipset," said Steven Jones, Systems Engineering Manager. "Using this program will help significantly reduce our customers' time to market."

Features/Benefits

TPIC43T01 motor controller

Digital Control:

Crystal oscillator based PLL	Provides precision RPM control.
Elimination of external control     loop compensation     components	Reduces accommodation of discretes.
Noise-immune digital filter	Improves reliability.
Continuous up/down PWM	Enhances RPM regulation.

User Programmable:

Crystal oscillator frequency     divider select	Increases flexibility.
Digital filter pole and zero	Optimizes system response.
Coast mode	Reduces time for motor to reach stable RPM.
Synchronous rectification     mode.	Reduces power dissipation and increases system efficiency.
EEPROM programmability	Optimizes system before or after system assembly.

TPIC1310 motor driver

Low on-resistance DMOS     FETs	Increases reliability through minimized power dissipation.
Current re-circulation through     DMOS FET body diodes	Eliminates external diodes required by bipolar devices, reducing external components and system cost.
High continuous current	Improves drive capability to suit a wide range of applications.
PowerFLEX™ packaging	Reduces printed board space with a low cost, small package outline.
Input transient and ESD     protection	Reduces cost and increases reliability due to enhanced and simplified gate drive circuitry.

End Equipment Applications

Applications for the TPIC43T01 motor controller and the TPIC1310 motor driver include:

Electronic Data Processing (EDP)

• Printers
• Copiers
• Fax Machines
• Scanners
• Plotters

Industrial

• Fans
• RPM control applications

Availability, Packaging and Pricing

The TPIC43T01 motor controller and the TPIC1310 motor driver are available now through Texas Instrument and its authorized distributors. The TPIC43T01 motor controller is available in a 38-pin thin small outline surface-mount package with suggested pricing at $2.08 in quantities of 1,000. The TPIC1310 motor driver is available in a 15-pin PowerFLEX through-hole and surface-mount packages with suggested pricing at $1.98 in quantities of 1,000.

More information regarding TI's Power+ products is available on the World Wide Web at http://www.ti.com/sc/docs/msp/msphome.htm.

Trademarks:
Power+ Array and PowerFLEX are trademarks of Texas Instruments, Incorporated.
Windows is a registered trademark of Microsoft Corporation.