Texas Instruments TPIC43T02DA

Overview

TPIC43T02DA from Texas Instruments is a monolithic three-phase brushless DC motor RPM controller IC with embedded DSP-based PLL loop compensation, EEPROM-programmable filter coefficients and PLL timebase division, differential Hall position decoding, and FG speed sensor interface. It delivers ±5% RPM lock detection, high-side current limiting, and gate drive for six external N-channel FETs in half-H configuration. Used in precision industrial blowers, HVAC fan modules, and medical centrifuge drives.

For engineers reviewing the TPIC43T02DA datasheet, TPIC43T02DA pinout, TPIC43T02DA application, or TPIC43T02DA equivalent, key selection criteria include synchronous rectification disable (vs. TPIC43T01), 8–28 V supply range, 22.7 kHz PWM frequency, EEPROM-configurable digital filter, and differential Hall/FG sensor interface compatibility.

Technical Context

The TPIC43T02DA implements a digital integrator and programmable FIR/IIR filter for closed-loop RPM control, with user-adjustable pole/zero coefficients stored in on-chip EEPROM. Its PLL architecture compares FGSOUT (digitized variable-reluctance speed signal) against an EEPROM- and FSEL-adjustable reference derived from a 5–10 MHz crystal oscillator.

It integrates dual analog front-ends: one for differential Hall-effect position sensing (±7 mV threshold, 1.5–3.5 V common-mode range), and another for FG signal conditioning (200 kHz GBW, ±7 mV offset, 3 mV sensitivity at 2 kHz). Gate drive logic supports commutation sequencing per Gray-code Hall inputs and forward/reverse direction control via F/R pin.

Key Specifications

Pinout & Package

TPIC43T02DA is housed in a 38-pin DA package (small-outline surface-mount), with exposed thermal pad for enhanced power dissipation in motor drive applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-phase BLDC RPM control applications.

Compared with TPIC43T01DA, TPIC43T02DA trades synchronous rectification for simpler gate-drive timing and reduced EMI risk; compared with STSPIN32F0B, it eliminates firmware dependency and delivers deterministic ±5% RPM lock without code development or runtime calibration.

Availability

TPIC43T02DA is available at Aetrix Electronics and suitable for industrial blowers, HVAC fan modules, and medical centrifuge drives requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPIC43T02DA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in motor control ICs.

The TPIC43T02DA belongs to TI's precision RPM controller product line, designed specifically for standalone, sensor-based three-phase BLDC motor regulation in industrial and medical equipment where reliability and analog-loop determinism are critical.

FAQ

What is the key functional difference between TPIC43T02DA and TPIC43T01DA?

The primary functional difference is synchronous rectification: TPIC43T01DA enables it by default (EEPROM bit 0.3 = H), while TPIC43T02DA disables it (bit = L). This affects low-side FET turn-on timing during PWM off-cycles - TPIC43T02DA relies on body-diode conduction, simplifying layout and reducing shoot-through risk. All other electrical characteristics, pinout, and EEPROM programming interfaces remain identical for the TPIC43T02DA.

Does TPIC43T02DA require an external microcontroller to operate?

No, TPIC43T02DA operates as a fully standalone motor controller. It integrates Hall decoding, FG signal conditioning, digital PLL, EEPROM-programmable filter, PWM generation, gate drive logic, and fault protection - eliminating the need for host processor intervention. The S/S pin starts/stops operation, and F/R controls direction; no firmware or real-time OS is required for basic RPM lock functionality in the TPIC43T02DA.

How is the RPM reference frequency configured on TPIC43T02DA?

The RPM reference frequency is set using a combination of external crystal (5–10 MHz on OSC1/OSC2) and two EEPROM bits (address 1, bits 0–1) that select divide-by values from 3072 to 16384. An additional hardware pin, FSEL, provides on-the-fly ×2 frequency scaling. Table 1 in the SLIS098 datasheet defines all 8 resulting FG reference frequencies - e.g., 5 MHz crystal + EEPROM 00 + FSEL=0 yields 163 Hz reference, directly mapping to motor RPM via gear ratio in the TPIC43T02DA.

What protection features does TPIC43T02DA include?

TPIC43T02DA integrates multiple hardware-based protections: high-side current limiting (SENSE pin threshold = 0.5 V), overcurrent shutdown (OCSD threshold = 1.0 V), stalled motor timeout (1023-cycle lock timer), VDD undervoltage lockout (2.5–4.0 V threshold), charge-pump UVLO (VCP < VCC + 5 V), and power-up clear ensuring known gate states at startup. All protections latch until S/S pin is cycled or power is reset - critical for safety-critical motor applications using the TPIC43T02DA.

Can TPIC43T02DA interface directly with variable-reluctance (VR) speed sensors?

Yes, TPIC43T02DA includes a dedicated FG amplifier stage optimized for VR sensors: FGIN+ and FGIN− accept differential AC signals, with 3 mV sensitivity at 2 kHz, 200 kHz gain-bandwidth, and built-in biasing. The amplified output FGOUT feeds a comparator to generate FGSOUT - a clean digital square wave used by the internal PLL. No external op-amps, filters, or level shifters are needed, making VR sensor integration seamless in the TPIC43T02DA.