ACQUISITION:

On May 1, 2012, the Company, through its subsidiaries Power Integrations Netherlands B.V., a Dutch company, and Power Integrations Limited, a Cayman Islands company, completed the acquisition of CT Concept Technologie AG ("Concept" or "Concept Group"), a Swiss company, by acquiring all of the outstanding shares of its Swiss parent companies Concept Beteiligungen AG and CT-Concept Holding AG (the “Acquisition”), pursuant to the Share Purchase Agreement ("Purchase Agreement").

The acquisition has been accounted for using the acquisition method of accounting in accordance with ASC 805 - Business Combinations. Under the acquisition method of accounting, the total purchase consideration of the acquisition is allocated to the tangible assets and identifiable intangible assets acquired and liabilities assumed based on their relative fair values. The excess of the purchase consideration over the net tangible and identifiable intangible assets is recorded as goodwill, and was derived from expected benefits from technology, cost synergies and knowledgeable and experienced workforce who joined the Company after the acquisition. Goodwill is not expected to be deductible for tax purposes.

The acquisition furthers the Company's strategic aim to offer highly integrated high-voltage power-conversion products across the widest possible range of power levels and applications. While Power Integrations has historically focused on power supplies up to 500 watts of output, Concept products address higher-power applications, such as industrial motors and renewable energy systems. As such, the combination is complementary to Power Integrations' existing business. Furthermore, Concept also has an expanding addressable market and a growing, profitable revenue stream that are consistent with Power Integrations' financial goals/targets.

The following table summarizes the purchase price and estimated fair values of the assets acquired and the liabilities assumed as of May 1, 2012, the completion of the acquisition of Concept ("Closing Date").



		Total Amount
Assets Acquired		(in thousands)
	Cash	$	14,933
	Accounts receivable	3,220
	Inventories	10,631
	Prepaid expenses and other current assets	2,777
	Property and equipment, net	2,310
	Intangible assets:
	Developed technology	23,750
	Trade name	3,600
	Customer relationships	16,700
	Goodwill	65,813
	Total assets acquired	143,734
Liabilities assumed
	Current liabilities	4,587
	Deferred tax liabilities	7,860
	Other liabilities	634
	Total liabilities assumed	13,081
	Total purchase price	$	130,653

The fair value of intangible assets of $44.1 million has been allocated to the following three asset categories: 1) developed technology, 2) trade name and 3) customer relationships. The first two will be amortized on a straight line basis over the estimated useful life of the assets. The third intangible asset, customer relationships, will be amortized on an accelerated basis over the estimated life of the asset. The following table represents details of the purchased intangible assets as part of the acquisition:



	Fair Value Amount		Estimated Useful Life
	(in thousands)		(in years)
Developed technology	$	23,750	4 - 12
Trade name	3,600		2
Customer relationships	16,700		10
Total Concept intangibles	$	44,050

The fair value of the identifiable intangible assets: developed technology, trademark and customer relationships were determined based on the following approach.

Developed Technology: The value assigned to the acquired developed technology was determined using the income approach. The royalty savings were estimated by applying an estimated royalty rate to the projected revenues for Concept for each developed technology. The selected royalty rate for the developed technology was based on the Company's analysis of comparable technology, royalty rate indications, and licensing agreements for comparable technologies. The royalty savings were then adjusted for taxes and discounted to present value. The fair value of developed technology was capitalized as of the acquisition date and is being amortized using a straight-line method to cost of revenues over the estimated life of 4 - 12 years.

Trade Name: The value assigned to Concept's trade name was determined using the income approach. The present value of the expected after-tax royalty savings was added to the sum of the expected amortization tax benefit. The royalty rate was selected based on an analysis of comparable trade name agreements. In addition, the rate was adjusted based on an analysis of Concept's projected performance and the importance of the trade name to the industry. The selected royalty rate was then applied to the projected revenues for the trade name. The fair value of the trade name was capitalized as of the acquisition date and is being amortized using a straight-line method to sales and marketing expenses over the estimated period of use of 2 years.

Customer Relationships: An intangible customer relationship asset was recognized to the extent that the Company was expected to benefit from future revenues reasonably anticipated given the history and operating practices of Concept. The value assigned to customer relationships was determined using the income approach. Forecasted cash flows derived from the acquired customer relationships, net of returns on contributory assets, were discounted to present value. Expectations related to future customer retention were based on historical data and a long-term forecast that was constructed based on the Company's financial projections and expectations. The associated income taxes were based on an assumed tax rate of a hypothetical buyer. The net income was then charged for the required returns of debt-free working capital, net fixed and other assets, developed technology and trade name to derive the residual cash flows related to the customer relationships acquired. The residual cash flows were then discounted to present value. The fair value of customer relationships was capitalized as of the acquisition date and is being amortized on an accelerated basis to sales and marketing expenses over the estimated life of 10 years.