TPIC43T01

Precision Phase Lock Loop Motor RPM Control With Embedded DSP Filter Algorithm for Loop Compensation
EEPROM Registers for User Adjustment of PLL Loop Gain and DSP Filter Coefficients (Pole/Zero)
Crystal Oscillator With EEPROM Adjustable Divide-By for Versatile PLL Timebase
Standalone Operation With No Host Processor Needed
RPM Lock Detection/Reporting  (±5% Window)
Synchronous Rectification Enabled (TPIC43T01) Disabled (TPIC43T02)
Stalled Motor Timer/Shutdown
High-Side Current Limiting
 High-Side Over-Current Shutdown
 Differential Hall Effect Position Sensor Inputs/Decode Provide Commutation Control 
Differential Variable Reluctance Speed Sensor Inputs
Gate Drive for Six External N-Channel Power FETs in Three Half-H Configuration
Charge Pump to Develop High-Side Gate Drive Voltage
5 V Regulator Designed for 10 mA External Current
8 to 28 V Supply Voltage
Small Outline Surface-Mount Package

The TPIC43T01/02 is a monolithic motor control integrated circuit designed to provide RPM control to a 3-phase brushless dc motor. The device provides two analog sensor input ports which include a speed sensor interface and a Hall effect position interface. The speed feedback interface consists of an FG amplifier to receive an external sinusoidal signal from a variable reluctance pickup and convert TPIC43T01/02 to a digital speed signal for the control circuit. When the motor speed is outside a ±5% window of the reference signal, an out-of-lock condition is declared. The Hall ffect sensor input section receives low-level differential voltages from external naked Hall elements and converts them to digital position reference signals for the control circuit for commutation control.

The core of the control circuit implements a digital signal processing algorithm consisting of a digital integrator and filter with user adjustable parameters to optimize the closed loop performance of the control system. The device contains an internal EEPROM to set integrator gain and digital filter coefficients. In addition, Texas Instruments provides a PC based WindowsE compatible software package to input the motor and system characteristics and convert them to control parameters for the TPIC43T01/02. The software generates a JEDEC compatible file to program the device through a third party device programmer.