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Switching ICs optimise smart mobile device charging

Posted: 18 Jan 2016     Print Version  Bookmark and Share

Keywords:Power Integrations  mobile device  switch  adaptive charging 

Power Integrations has introduced a line-up of off-line CV/CC flyback switching ICs that feature a constant power output profile which, when paired with an adaptive-voltage protocol such as Qualcomm Quick Charge 3.0 or USB-PD, allows smart mobile device makers to optimise charging time. The InnoSwitch-CP ICs use Power Integrations' innovative FluxLink technology that enables high-performance secondary-side control to be implemented with the simplicity and low component count usually associated with primary-side regulation, the company stated.

Developers employing adaptive charging technology achieve dramatically faster charge times, improved charging efficiency and backward compatibility with the popular 5V USB BC 1.2 specification, all while minimising overall thermal management and battery charging system cost.

InnoSwitch-CP ICs

FluxLink technology also optimises the effectiveness of output synchronous rectification, resulting in extremely high efficiency across the full load range. For example, no-load consumption at 230VAC is less than 10mW, while full-load efficiency exceeds 90 per cent. InnoSwitch-CP devices easily meet all global energy efficiency regulations, the company added.

InnoSwitch-CP ICs incorporate a comprehensive suite of advanced protection features including: OVP; output OCP with 3V auto restart; hysteretic thermal shutdown and line input overvoltage protection with accurate brown-in/brown-out thresholds. Devices are fully compliant with safety and regulatory standards, including: 100 per cent production HIPOT compliance testing equivalent to 6kV DC/1s; reinforced insulation; and isolation voltage testing to above 3.5kVAC. They are UL1577 and TUV (EN60950) safety approved and EN61000-4-8 (100A/m) and EN61000-4-9 (1000A/m) compliant.

Two devices are available. The INN2214K IC delivers 15W output power for universal voltage chargers and adapters, while the larger INN2215K part delivers up to 22W for similar applications. InnoSwitch-CP samples are available. Devices are priced at $0.90 in 10,000-piece quantities.

InnoSwitch-CP block diagram

InnoSwitch-CP block diagram


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