Tuesday, June 25, 2024
HomeElectronicsSTMicroelectronics reveals monolithic automotive synchronous buck converters for light-load, low-noise, and remoted...

STMicroelectronics reveals monolithic automotive synchronous buck converters for light-load, low-noise, and remoted purposes

Save area and ease integration in automobile physique electronics, audio methods, and inverter gate drivers

STMicroelectronics has launched new automotive-qualified step-down synchronous DC/DC converters that save area and ease integration in purposes together with physique electronics, audio methods, and inverter gate drivers.

The A6983 converters provide versatile design selections, comprising six non-isolated step-down converters in low-consumption and low-noise configurations and the A6983I remoted buck converter. With compensation circuitry on-chip, these extremely built-in monolithic units want solely minimal exterior parts together with filtering, suggestions, and a transformer with the A6983I.

The non-isolated A6983 converters can provide as much as 3A load present and obtain 88% typical effectivity at full load. The low-consumption variants (A6983C) are optimized for light-load operation, with excessive effectivity and low output ripple, to attenuate drain on the car battery in purposes that stay energetic when parked. The low-noise A6983N variants function with fixed switching frequency and decrease output ripple throughout the load vary for optimum efficiency in purposes comparable to audio-system energy provides. Each sorts provide a selection of three.3V, 5.0V, and adjustable output voltage from 0.85V to VIN.

The A6983I is a 10W iso-buck converter with primary-side regulation that eliminates the necessity for an optocoupler. Very best to be used as an remoted gate driver for IGBTs or silicon-carbide (SiC) MOSFETs in traction inverters and on-board chargers (OBCs), this converter permits correct adjustment of the first output voltage. The transformer turns ratio determines the secondary voltage.

All remoted and non-isolated variants have a low quiescent working present of 25µA and a power-saving shutdown mode that pulls lower than 2µA. The input-voltage vary from 3.5V to 38V, and load-dump tolerance as much as 40V, forestall disruption as a result of transients on the principle provide bus. There’s additionally output overvoltage safety, thermal safety, and inner gentle begin. As well as, optionally available spread-spectrum operation helps decrease electromagnetic interference (EMI) for noise-sensitive purposes, and a power-good pin that permits energy sequencing. The A6983I and A6983 enable synchronization to an exterior clock.

The converters are provided in a 3mm x 3mm QFN16 bundle. Pricing begins at $1.75 for the A6983 and $1.81 for the A6983I, for orders of 1000 items, and free samples of the A6983 and A6983I can be found from the ST eStore. The STEVAL-A6983CV1 and STEVAL-A6983NV1 A6983 analysis boards and STEVAL-L6983IV for the A6983I can be found to kickstart improvement and speed up undertaking completion.



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