Save area and ease integration in automotive physique electronics, audio programs, and inverter gate drivers
STMicroelectronics has launched new automotive-qualified step-down synchronous DC/DC converters that save area and ease integration in functions together with physique electronics, audio programs, and inverter gate drivers.
The A6983 converters supply 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 gadgets 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 automobile battery in functions that stay lively when parked. The low-noise A6983N variants function with fixed switching frequency and reduce output ripple throughout the load vary for optimum efficiency in functions corresponding to audio-system energy provides. Each varieties supply a alternative 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. Splendid 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, stop disruption resulting from transients on the primary provide bus. There may be additionally output overvoltage safety, thermal safety, and inside tender begin. As well as, optionally available spread-spectrum operation helps decrease electromagnetic interference (EMI) for noise-sensitive functions, and a power-good pin that allows energy sequencing. The A6983I and A6983 enable synchronization to an exterior clock.
The converters are provided in a 3mm x 3mm QFN16 package deal. 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 growth and speed up mission completion.