Switching ICs improve smart devices performance

25th April 2016

Mick Elliott

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Datasheet

The InnoSwitch-CP switching ICs, part of the InnoSwitch family from Power Integrations have been introduced by Mouser Electronics. These new offline constant-current/constant-voltage flyback switching ICs incorporate a constant power output profile which, when paired with an adaptive-voltage protocol such as USB-PD, helps designers of smart devices achieve faster charge times, improved charging efficiency, and backward compatibility with the popular 5V USB BC 1.2 specification.

This occurs while minimising overall thermal management and battery charging system cost.

The switching ICs are available in two models — the 15W-output INN2214K and 20W-output INN2215K — both of which incorporate a flyback controller, 650V MOSFET, secondary-side sensing, and synchronous rectification driver to provide extremely high efficiency across the full load range.

TheICs use Power Integrations’ FluxLink technology, which enables high-performance secondary-side control to be implemented with the simplicity and low component count usually associated with primary-side regulation.

FluxLink enables feedback information to be delivered across an isolation barrier without the use of magnetic materials, and delivers a very high communication bandwidth, which enables a much faster load-transient response.

Additionally, the minimal DC bias requirements of the integrated communication link, enable the system to achieve less than 10 mW (no-load).

The InnoSwitch-CP family of ICs dramatically simplify the development and manufacturing of low-voltage, high-current power supplies, particularly in compact enclosures or with high efficiency requirements.

The ICs incorporate a comprehensive suite of advanced protection features including overvoltage protection, output overcurrent protection with 3V auto restart, hysteretic thermal shutdown, and line input overvoltage protection with accurate brown-in/brown-out thresholds.