Power Integrations unveils 1,250-V GaN switcher IC

Power Integrations has expanded its InnoSwitch family of off-line CV/CC QR flyback switcher ICs, featuring a 1,250-V PowiGaN switch. Claimed as the industry’s highest-voltage, single-switch gallium-nitride (GaN) power supply IC, the InnoSwitch3-EP 1,250-V GaN switcher IC extends the efficiency of GaN to a wider range of applications, many of which are now served using silicon-carbide (SiC) technology.

The InnoSwitch family of flyback switcher ICs feature synchronous rectification and FluxLink safety-isolated feedback. The family also offers several switch options including 725-V silicon, 1700-V SiC, and PowiGaN in 750-V, 900-V and now 1,250-V versions.

(Source: Power Integrations)

Switching losses for the 1,250-V PowiGaN technology are less than a third of silicon devices at the same voltage. This delivers power conversion efficiency as high as 93 percent for highly compact flyback power supplies that can deliver up to 85 W without a heat sink.

Designers using the new 1,250-Volt GaN switcher IC can specify an operating peak voltage of 1,000 V, enabling industry-standard 80 percent de-rating from the 1,250-V absolute maximum. This delivers headroom for industrial applications and meets challenging power grid environments.

Power Integration also offers a reference design (DER-1025) for a 60-W isolated flyback adapter that targets general use in appliances or industrial applications using a 1,250-V InnoSwitch3-EP 1250-V PowiGan switcher IC (INN3629C-H606). It is available for free download.

Pricing for the InnoSwitch3-EP 1,250-V switcher IC in the INSOP-24D package starts at $3.00 in quantities of 10,000. Samples are available and lead time for volume shipments is 16 weeks.