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Home Semiconductor News

Mode-Programmable Synchronous Boost Converter from Diodes Incorporated Raises Power Efficiency Levels in Consumer Devices

Semiconductor For You by Semiconductor For You
July 26, 2022
in Semiconductor News
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Plano, Texas – July 26, 2022 – Diodes Incorporated (Diodes) (Nasdaq: DIOD) has introduced a high-efficiency synchronous boost converter. The DIODES™ AP72250 is targeted at step-up conversion in consumer and industrial applications where small form factors are a priority. These include battery-powered devices, USB power supply units, power banks, supercapacitor charging equipment, and metering systems.

The AP72250 supports a 900kHz switching frequency with a 20µA quiescent current (IQ). It covers a wide input voltage range between 0.6V and 5.5V, with a minimum 1V input startup, and has a 1.7V to 5.5V output voltage range. Integrated into this boost converter are a 20mΩ high-side power MOSFET and a 26mΩ low-side power MOSFET.

Several different operating modes can be selected for the AP72250, and these can be programmed according to users’ needs. They are: pulse frequency modulation (PFM), ultra-sonic mode (USM), and forced pulse width modulation (FPWM) mode. This choice of modes allows engineers to adjust operation under either heavy or light load conditions in order to maximize efficiency. As a result, even when in light load situations, up to 89% efficiency can be attained. Through its USM mode, switching in the audible frequency range is prevented.

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The AP72250 has excellent line and load transient responses, and delivers a seamless transition between boost and pass-through operation (in applications where this is required). The peak current mode control scheme of the AP72250 allows it to handle a wide variety of input-to-output ratios. Consequently, the number of external components needed to support it are significantly less than for competing solutions, and this keeps the bill-of-materials (BOM) costs down. Undervoltage lockout, thermal shutdown, peak current limit, negative current limit, and output short-circuit protection functions are also included.

The AP72250 is supplied in a WLCSP-12 package (measuring 1.75mm x 1.35mm x 0.45mm). It is available at $0.31 in 1000 piece quantities.

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