Microchip Technology ATA6829-T3QY-44

Overview

ATA6829-T3QY-44 from Microchip Technology (formerly Atmel) is a dual triple DMOS high- and low-side driver IC designed for automotive and industrial load control. It integrates three independent high-side and three low-side drivers, each rated for up to 1.5A output current, with R_DS(on) ≤ 1.1Ω at 150°C, 40V supply capability, and serial daisy-chain interface up to 2MHz - used to drive DC motors, bulbs, solenoids, and inductive loads in body control modules and chassis electronics.

For engineers reviewing the ATA6829-T3QY-44 datasheet, ATA6829-T3QY-44 pinout, ATA6829-T3QY-44 application, or ATA6829-T3QY-44 equivalent, this page delivers verified technical context, validated pin functions, real-world diagnostic capabilities (open-load, short-circuit, overtemperature prewarning), PWM-controlled switching per channel, and precise alternative part guidance - all grounded in the official 4531H–BCD–04/12 datasheet.

Technical Context

The ATA6829-T3QY-44 implements six independently configurable DMOS power switches - three high-side (open-source) and three low-side (open-drain) - each with integrated reverse diodes, current limiting, and thermal shutdown. Its serial interface uses a 16-bit input register for output control and a 16-bit status register for diagnostics including TP (thermal prewarning), OVL (overload), PSF (power-supply fail), and open-load detection per channel.

Control logic supports simultaneous standalone or half-bridge operation, with external PWM inputs enabling duty-cycle modulation per selected output. Protection architecture includes undervoltage lockout (V_UV = 7.0V), selective overtemperature shutdown (T_{jSWITCH OFF} = 175°C), and shoot-through prevention via hardware-enforced dead time (≤1µs).

Key Specifications

Pinout & Package

ATA6829-T3QY-44 is housed in a PSO16 (Power Small Outline) package with exposed thermal pad (ePAD), optimized for PCB heat dissipation. Pin 1 is GND (heat slug connection); pins 1, 9, and 16 are internally tied to ground and must be soldered to a large copper pour for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-/low-side driver applications.

Compared with BTS724G and MC33883, the ATA6829-T3QY-44 uniquely combines six integrated DMOS switches, full diagnostic visibility, and daisy-chain serial control in a single PSO16 package - making it optimal for cost-sensitive, space-constrained automotive body electronics where functional safety reporting is mandatory.

Availability

ATA6829-T3QY-44 is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drives, commercial lighting systems, and chassis electronics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ATA6829-T3QY-44 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

Microchip Technology acquired Atmel in 2016 and maintains full product support, documentation, and qualification for legacy Atmel automotive ICs including the ATA6829 series.

The ATA6829-T3QY-44 belongs to Microchip's automotive-grade power driver portfolio, engineered specifically for ASIL-B–capable load control in body electronics, chassis systems, and industrial automation where robustness, diagnostics, and serial configurability are critical.

FAQ

What is the maximum junction temperature rating for the ATA6829-T3QY-44?

The ATA6829-T3QY-44 has a maximum junction temperature of +150°C, with thermal shutdown triggered at T_{jSWITCH OFF} = 175°C (typical) and thermal prewarning at T_{jPW SET} = 145°C (typical). These thresholds are individually monitored per output stage and reported via the TP bit and status register bits 1–6 in the ATA6829-T3QY-44 output data protocol.

Does the ATA6829-T3QY-44 support half-bridge operation for DC motor control?

Yes, the ATA6829-T3QY-44 supports half-bridge operation by pairing one high-side and one low-side driver per motor winding. Its block diagram and functional description confirm dedicated H-bridge support, and the absence of shoot-through current is enforced by hardware-level dead time control - a key requirement for reliable DC motor commutation in the ATA6829-T3QY-44.

How does open-load detection work on the ATA6829-T3QY-44?

Open-load detection on the ATA6829-T3QY-44 activates when the OLD bit (bit 13) in the input register is set low, applying a test current (±0.2–2.5mA) to each high-/low-side output. If no return current is sensed, the corresponding status bit (e.g., bit 1 for LS1) in the output register goes high - indicating an open circuit. This function is disabled when the output is actively switched on.

Can multiple ATA6829-T3QY-44 devices be connected in series using the serial interface?

Yes, the ATA6829-T3QY-44 supports daisy-chain configuration: the DO (data out) pin of one device connects to the DI (data in) pin of the next, with shared CLK and CS lines. Each device shifts its 16-bit input register on the same clock, enabling coordinated control of up to 6×N outputs using only four MCU pins - a documented capability confirmed in the ATA6829-T3QY-44 datasheet Figure 3-1 and Table 3-1.

What protection features are integrated into the ATA6829-T3QY-44?

The ATA6829-T3QY-44 integrates short-circuit protection (current-limited outputs with OCS-enabled shutdown), undervoltage protection (PSF flag at V_VS < 7.0V), selective overtemperature protection per channel (with prewarning and shutdown thresholds), and open-load detection. All protections feed into the 16-bit status register for real-time fault diagnosis - no external components required for basic safeguarding in the ATA6829-T3QY-44.