Re: High brightness white LEDs damaged by custom switcher

From: Winfield Hill <hill@xxxxxxxxxxx>
Date: 4 May 2007 12:13:16 -0700

Paul E. Schoen wrote:

power is applied and removed. The PWM is controlled by the voltage
on a 1 ohm sense resistor, and it is designed to ramp up slowly and
cut back quickly. [ snip, or should I say snap? ]

Hmm, are you trying to maximize thermal-gradient stresses?

.

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