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High Reliability Phase Shift Driver TLC6A598

for Avionic Applications

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Texas Instruments TLC6A598 8-Bit Phase-Shift Driver is a monolithic, high-voltage, high-current power 8-bit shift register designed for use in systems that require relatively high load power such as LEDs. The Texas Instruments TLC6A598 characterization is for operation over the operating ambient temperature range of −55°C to 125°C.

High Reliability:

High reliability refers to the perfection and excellence in a device or it can be used for the long term without any fault. In this article, a High-reliability driver is a driver that is protected from the damages like overcurrent, short circuits, high currents, and overheating and can be used in large-scale applications like avionics.

Phase Shift in Avionics:

Avionics refers to the electronic systems designed for use in aviation. It is a combination of both aircraft and electronic systems. It includes navigation, flight control, engine control system, fault or damage detection, and communication. Applications of avionics are in Commercial airliners, helicopters, military fighter jets, and spacecraft. They use avionics to provide services, track and identify performance measures, and operate within established safety parameters.

In avionics, communication through RADAR is very crucial. The TLC6A598 is responsible for communication and safety in avionics. They control the phase of elements in a phased array antenna in communication, especially in RADAR. This is how communication is possible in avionics.

Introduction to TLC6A598:

The TLC6A598 device is a monolithic, high-voltage, high-current power 8-bit shift register designed for use in systems that require relatively high load power, such as LEDs. This device has built-in voltage clamps on the output side for inductive transient protection, so it can also drive relays, solenoids, and other low-current or high-voltage loads. They can limit the current level to avoid any short circuits in the device. This device is highly reliable and robust for avionic applications.

It contains an 8-bit serial-in, parallel-out shift register that is used to provide an 8-bit D-type storage register. Outputs are low-side, open-drain DMOS transistors with output ratings of 50 V and 350-mA continuous sink-current capabilities. The current limit decreases as the junction temperature increases for additional device protection. A built-in load open or load short diagnostic mechanism provides enhanced safety protection. The device provides a cycle redundancy check to verify register values in the shift registers. This chip has a range of operating voltage i.e. -55◦C to 125◦C.

Board Design:

I have designed a board using a TLC6A598 device. The purpose of designing this board is to provide an example of the solution of controlling 8 channel relays. This board helps users evaluate the operation and performance of the TLC6A598. It operates with two power supplies i.e. 5V DC and 24V DC. One of them is used to control TLC6A598 and the other one is used to provide power to relays.

Design files:

I have uploaded the schematic file of this board online on Inventhub. The viewers can visually view and download it to implement my design.

For a better view of my PCB design board in different layers, I have uploaded the PCB file of my design on Inventhub. The manufacturer can easily download this file and implement my design on a board without any error.

For fabrication of this board, I have created a release file of the project which is a ZIP file containing all schematic, PCB, routing layers, and 3D model of the chip. To fabricate my PCB, I will send this release file to my manufacturer instead of visiting him, he can download the file and fabricate my board.

Bill of Materials:

I also have created an online Bill of Material on Inventhub. Sometimes, it becomes difficult to order the component with the same footprint and dimensions as per design requirements. This BOM file contains the details of the dimensions of each component. The component provider can export the file in CSV format and can deliver my components easily. I can calculate the total cost of my project according to the components and manufacturer I have chosen for my design. By clicking on ‘Edit BOM’ I can select the ‘supply chain’ button to calculate the cost of my product....

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