The Planted Tank Forum - View Single Post - Built another DIY led driver!
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Old 10-28-2011, 02:00 PM   #3
evilc66
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In it's most basic sense, it is a PWM driver, but it really is a lot more than that. The LM3409HV is an external FET LED driver. Functions just the same as an internal FET driver, like an LM3404 (very common NI driver). The external FET allows much higher current and voltages. The driver IC still has all the smarts for current sensing, frequency adjustment, and fault monitoring.
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