Pulser Eighth Brick

The P0824120 converter delivers 12V/25A output from 18~36V input with industry standard 1/8-Brick pin assignment. The converter core is designed with patented “Buck-Reset Forward” topology and proprietary “Partial-Resonant-Synchronous-Rectifier“ rectification stage switching at 450kHz frequency to efficiently deliver 300 watts of power, achieving 94% of conversion efficiency and 248W/in3 of power density. By employing Glary’s latest proprietary wide-band Pulsed-load-signal-estimator (Pulser) circuit technology, its step load performance has been optimized to suppress the peak deviation well under ±8% of its rated output voltage within 40us caused by high ratio pulsed-load, which sinks 0~90% or 0~100% of the rated output current. A ±5% or ±3% of peak deviation can be easily achieved by adding a 470uF or 2200uF of external output capacitor with the pulsed-load respectively. In order to protect the converter and its load from the risk of over power caused by very low impedance short circuit on output terminal pins, a proprietary UltraFast i-Limit technology is also embedded to eliminate the “Short-Circuit-Current-Runaway” phenomenon, which induces a very high output current in proportion to its minimum duty cycle limited by the propagation delay of the current controlling loop. With the UltraFast i-Limit, the propagation delay of the current loop can be largely reduced from 350us to 60nS, effectively limiting the output current to 1/3 of that from conventional converters, without reliability impact when powering ultra-low impedance loads, the P0824120 converter provides superior driving capability to motors and capacitive loads. All the power semiconductor chips of the P0824120 converter are attached onto the inner surface of a low profile six-sided metallic case to spread heat to the outer surface homogeneously, and further result in lower thermal resistance for better cooling. External cooling means can be attached on its top or bottom sides by using four M2 screws, which provide sufficient mechanical strength for application of vehicles with harsh vibration. In order to to help the heat transfer, the cavity of the metal case is vacuum potted by using thermal conductive silicone, which also maintains hydrostatic pressure balance to secure the operating across 1mBar~100Bar of pressure range. The P0824120 converter can effectively simplify the system power design of critical pulsed-load applications in extreme environments such as deep-water probes, pulsed-laser equipments, pulsed emitters, RF amplifiers, high altitude instruments and similar equipments that other power converter designs cannot serve.