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Frequently Asked Questions
1. Oscillation on A/TL431, TLV/H431, A/TL431LI
One common question always regards oscillation and stability of '431 like devices. The architecture of the TL431 was designed over 30 years ago. The architecture naturally has a instability region that should be avoided or else oscillation will occur. This is heavily dependent on the CLoad and Ika and thus choosing an appropriate CLoad will help '431 devices avoid oscillation.
Here is content over this subject
Understanding Stability Boundary Conditions Charts in TL431, TL432 DataSheet
Designing with the "Advanced" TL431, ATL431
Designing With the Improved TL431LI
Choosing the Right Voltage Reference for Your Automotive Application
Introduction: In automotive systems such as ADAS, body electronics, powertrain, etc. there is a need for precise data converters. For every data converter, a precise voltage reference (VREF) is often necessary to reach the lowest possible errors when measuring automotive signals. While many data converters can incorporate internal references, it is difficult to find a internal voltage reference in CMOS technology that can reach the high accuracy, low temperature drift, and low noise of a bipolar process. This is even more complicated in digital processes for MCUs as the internal reference can be noisy due to all the inherit clocking noise. Due to this, it is often desirable to use an external voltage reference to have more precise measurements.
Automotive LED Lighting With Adjustable Shunt References
Introduction: Automotive suppliers are developing innovative ways to further enhance the user experience within vehicles. For instance, the external rear lights have various functions such as sequential illuminating turn signal indicators, dynamic braking lights, and multiple design elements for aesthetics - all possible with the adoption of LED lighting. There are various methods to implement how these LEDs are powered, one discrete method is by using a simple voltage reference. This method could yield design advantages such as ease in design efforts and reduction in solution cost.
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