Application Note Summary This application note explains how to specify arc protection and fast recovery for X-ray high voltage power supplies and other demanding high-voltage systems. It covers arc detection latency, event-energy limiting, controlled voltage recovery, retry logic, fault reporting, and verification methods for real high-voltage loads. The note helps engineers define practical RFQ requirements and select HVPS solutions that can detect arcs quickly, limit damage, recover cleanly, r...(more)
How to protect a high voltage power supply from spark and arc loads — three topology modes, the self-firing relaxation-oscillator waveform, arc-starving resistor sizing, and safe-access bleeder design....(more)
A practical design guide to constant-current charging of capacitor banks: CC/CV sizing equations, the CC-to-CV transition, stored-energy hazard, and bleeder discharge for safe access....(more)
Specifying an X-ray high voltage power supply is more than a kV number — define ripple, regulation, stability, arc recovery, operating mode, and filament/mA control to keep the beam steady....(more)
High-Voltage Power-SupplyOutput Spark ProtectionHow to Limit Fault Current When Sparks Are Unwanted,and How to Generate Energetic Sparks Safely When They Are WantedSizing the Series Current-Limiting Resistor and the Parallel Storage CapacitorAnalog Technologies, Inc. | Technical Note ATNHVPS-08 | May 9, 20221. IntroductionHigh-voltage power supplies - those operating at hundreds or thousands of volts - face a problem that low-voltage designers rarely think about: sparking at the output. When the...(more)
Laser driver placed in front of the optical emission is designed for biasing and modulating laser, i.e. it converts high speed voltage signal into high speed current signal to modulate laser. In order to meet different design requirements, our company (ATI) has released many kinds of laser drivers, such as ultra-low noise laser driver, high efficiency laser driver, dual mode laser driver and so on. Next, dual mode laser driver will be introduced in details. Figure 1. The photo of LDA1-CP1 LDA1-C...(more)
When designing a laser system, the first thing needed is to make decision: design a laser driver or use an off-the-shelf laser driver. Which way is better? Design a Laser Driver vs. Using an Off-the-shelf Laser Driver It is apparent that designing a laser driver will save money in the long run for high volume production laser systems. But the cost for this route is not low: high design cost, long design time, high risk to fail or result in sacrificed performance because designing a good laser dr...(more)
This technical note derives the theoretical relationship between the hot-side temperature (Th) and the maximum achievable temperature difference (DTmax) of thermoelectric cooler modules from first principles. It explains why higher Th produces a larger DTmax, provides the closed-form equation DTmax = Th + 1/Z - sqrt(2Th/Z + 1/Z^2), and includes numerical predictions for Bi2Te3 from -20 C to 120 C....(more)
