US semiconductor producer Diodes has launched 4 new automotive-compliant asynchronous buck converters for 48 V low-voltage rail point-of-load purposes.
The AP68255Q/AP68355Q and AP6A255Q/AP6A355Q incorporate 500 m? energy MOSFETs to ship high-efficiency step-down DC-DC conversion and as much as 3.5 A of steady output present. The converters cowl the complete automotive battery vary from 5.5 V to 80 V/100 V, together with load dump eventualities. They can be utilized in purposes together with 48 V motor management, superior driver help methods (ADAS), telematics, infotainment, physique management, instrument clusters and lighting methods.
The buck converters make use of fixed on-time (COT) management to take care of a virtually fixed switching frequency of 300 kHz. This system ends in quick load/line transient response, straightforward loop stabilization and low output voltage ripple, in keeping with the corporate, making it simpler to include the gadgets by requiring fewer exterior elements.
The gate-driver association within the gadgets reduces swap node ringing results with out sacrificing the turn-on and turn-off occasions of the N-channel MOSFET swap. That is designed to assist cut back the high-frequency radiated electromagnetic interference noise sometimes related to MOSFET switching.
The AP68255Q/355Q and AP6A255Q/355Q asynchronous buck converters can be found within the thermally enhanced SO-8EP bundle and assist an working temperature vary of -40° C to 125° C.
Constructed-in overcurrent safety (OCP) incorporating a frequency foldback mode offers excessive load-current assist whereas decreasing junction temperature beneath fault situations. The overtemperature safety (OTP) circuit instantly shuts down the controller’s output voltage at 160° C. The converter robotically restarts when the temperature drops under the 140° C security threshold to forestall controller harm or malfunction.
Supply: Diodes
