ATA6838C-PXQW

Overview

The ATA6838C-PXQW is a hex half-bridge gate driver manufactured by Microchip Technology, designed for controlling up to six independent loads in automotive and industrial applications. It features a serial data interface compatible with standard microcontrollers, supporting clock frequencies up to 2 MHz. The device operates within a supply voltage range of 4.75V to 5.25V for logic and handles load voltages from 5.5V to 40V. Key electrical parameters include an output current capability of 950mA per channel, a typical on-resistance (RDSon) of 1.0Ω at 25°C, and a maximum of 1.8Ω at 150°C. It utilizes a 24-VQFN package with dimensions of 5x5 mm.

Feature Summary

• Integrates six half-bridges formed by high-side and low-side drivers for versatile load control including DC motors, bulbs, and inductors.
• Features comprehensive protection mechanisms including short-circuit protection, overtemperature prewarning, and undervoltage lockout.
• Supports various diagnosis functions such as open load detection, shorted output identification, and power supply failure monitoring.
• Enables daisy-chaining capabilities and offers very low quiescent current consumption in standby mode.

Applications

• Automotive lighting systems
• Brushed DC motor control
• Industrial load switching
• Actuator driving

Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified agents. Confirm the specific suffix PXQW matches the required 24-VQFN package and tape-and-reel quantity. Check for AEC-Q100 qualification status if automotive grade compliance is mandatory. Ensure ESD handling protocols are followed during storage and assembly due to moisture sensitivity classification.

Selection Notes

Select this component when a multi-channel half-bridge solution with integrated diagnostics is required. Consider the 950mA output current limit and 40V maximum load voltage constraints. Evaluate thermal performance given the RDSon specifications at elevated temperatures. Verify SPI compatibility with the host microcontroller's serial interface speed and pin configuration requirements.

Part Context

The ATA6838C belongs to Microchip's ATA68xx series of smart power devices based on SOI technology. This series is engineered for robust automotive environments, offering high integration levels to reduce system complexity. The C variant typically denotes specific commercial or extended temperature ranges compared to other suffixes. It serves as a bridge between low-voltage logic controllers and higher-voltage power loads.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Microchip technical support for direct replacements or obsolescence management strategies.